• 中国中文核心期刊
  • 中国科学引文数据库(CSCD)核心库来源期刊
  • 中国科技论文统计源期刊(CJCR)
  • 第二届国家期刊奖提名奖

2007 Vol. 20, No. 1

Display Method:
Water Consumption ofEucalyptus urophy lla P lantations on the Leizhou Peninsula
ZHANG Ning-nan, XU Da-ping, JIM Morris, ZHOU Guang-yi, BAI Jia-yu, ZHOU Tao
2007, 20(1): 1-5.
Abstract:
T ree grow th, w ater consumption, clima te factors, availab lew ater in so il pro file as deep as 4 meters w eremon ito red for 1 year in 4-year-o ld Eucalyp tus urophy lla trees grow n in contrasting so il types at the Le izhou pen insula, southeastern China. The present experimental resu lts indica ted that the sapw ood area in Eucalyp tus urophyllatrees w as close ly re lated to d iameter at breast height ( DBH ) and itw as possible to use the sapw ood area in scalingup estimat ion o fw ater consumption from an ind iv idual tree to stand leve.l Themean daily sap flow density ( SFD) inHetou and Jijia, the study sites, w ere respective ly 2 772、1 839 L m-2 d-1; mean da ily w ater use w ere 1. 49、1??53mmd -1. Annualw ater use ofHetou and Jijia p lantations were 542 and 559mm, respective ly; wh ich w ereequ iva lent to 35% and 36% of annua l ra infal.l Low w ater use may have resulted from comb ined e ffects o f severalfacto rs, including open canopy and low leaf area index, soilw ater decline in the dry season, and low vapor pressuredef ic i,t which limited w ater consumption o f the trees.
Clon ing of fad2 Gene Fragments from Ca ragana in te rm edia, Constructing ofAn isence fad2 Expression Vector and Its Genetic Transforma tion in Tobacco
WANG Yang-dong, LI Chun-xiu, QI Li-wang, ZHANG Shou-gong
2007, 20(1): 6-9.
Abstract:
△-12 fatty acid desaturase is an important enzyme in the route of p roduction of polyunsaturated lip ids. Control the gene exp ression of △-12 fatty acid desaturase can change p lant fatty acid for good p lant biodiesel. Two cDNAfragments of fad2 gene were cloned using degenerate primers from Caragana interm edia, an important biodiesel plant.The DNA sequence analysis indicated that the fragments contained 452 and 480 bp respectively, and shared 88% ofhomology with Glycine max Gmfad2-2a in GenBank. Both of the gene fragments were registered in GenBank(AY957393). The fragment AY957394 (452 bp)was digested with the enzyme BamH I and Sac I, and ligated to thecorresponding sites of the pB I121 in the antisense orientation. The pB I121fad2 vectorwas introduced into Agrobacterium tum efaciens strain LB4404 by electroporation and transformed to leaves of tobacco via Agrobacterium tum efacienssystem. Plantletswere regenerated in vitro by resistance selection on medium containing Amp icillin and Kanamycin.PCR amp lification with p rimer designed according to the fad2 gene fragment and NPTII gene in pB I121 demonstratedthat antisense fad2 was integrated into tobacco genomes. The analysis of fatty acids of transgenic tobacco p lants withantisense fad2 showed that the content of linoleic acid was 10. 3% less than that of the un2transgenic tobacco plants.
Adaptability and Performance Test of Large BerryCultivars of Sea Buckthorn
ZHANG Jian-guo, DUAN Ai-guo, HUANG Quan, LUO Hong-mei, SHAN Jin-you, WU Yong-lin
2007, 20(1): 10-14.
Abstract:
Adap tability and comp rehensive evaluation of 12 Russian Cultivars and 1Mongolian Cultivar of Sea buckthorn (Hippophae rham noides) were studied at 3 sites, Shuiling of Heilongjiang, Dengkou of InnerMongolia andYongshou of Shaanxi. The results showed: (1) The main affection factorwas environmental factor for the adap tability of Large Berry Cultivars of Sea Buckthorn. In the development of Large Berry Cultivars of Sea Buckthorn, geographical location must be considered firstly; when the p lanting p lace determined, then the breed needed to be selected according to their adap tability. ( 2) The adap tability of Large Berry Cultivars of Sea Buckthorn originatedfrom high latitude had the decreasing trend with the decreasing of latitude in China. Trial p lots of Shuiling, Dengkouand Yongshou belonged to the best adap table introduction region, the adap table introduction region and theun2adap table introduction region. ( 3) In Shuiling trial p lot, the Large Berry Cultivars of Sea Buckthorn with thefruit p roduction above 4 500 kg·hm-2 were Chuyi, Hunjin, Yousheng, Chengse, Aertaixinwen, Wulangemu; In Dengkou trial plot, the Large Berry Cultivars of Sea Buckthorn with the fruit p roduction above 6 000 kg·hm-2 wereChuyi, J inse and Yousheng, these introduced breedswere worthy of vigorously develop ing. (4) The adap tability region ofLarge Berry Cultivars of Sea Buckthorn in China could be divided into 3 regions: the best adap table introduction region, such as Shuiling County, the adap table introduction region such asDengkou County and the cultivationtaming region such as Yongshou County.
Study on Eco-hydrolog ica l Function of Forest-litter and So il in the SouthSide of L iupan Mounta ins, Ningx ia Hui Autonomous Region, China
ZHANG Lei-yan, LIU Chang-fu, WANG Yan-hui, SHI Zhong-jie, HE Chang-qing, XIONG Wei, YU Peng-tao
2007, 20(1): 15-20.
Abstract:
To study the eco-hydrological function of litter and soil, a naturalmixed forest of oak (Quercus liaotungensis) and linden ( Tilia paucicostata) and a p lantation of larch (La rix principis-rupprech tii) in the smallwatershedof Xiangshuihe in south side of L iupan Mountains of Ningxia Hui Autonomous Region were selected as researchstands. The results showed that: the un2decomposed (Ol ) and semi2decomposed litter (Of ) had a water holding capacity of 5. 42 and 11. 28 t·hm-2 for the mixed stand, 5. 72 and 24. 51 t·hm-2 for the larch forest. The effectivewater holding dep th of litter layer of these two standswere 0. 56 and 1. 63 mm respectively. Itmeaned that the litter’s capability of water holding for larch p lantation was better than that of the mixed stand. The water holding capacities of non2cap illary pores and cap illary pores of 1 m soil layer were 108. 15 and 441. 02 mm for the mixedstand, obviously higher than those for the larch forest ( 65. 80 and 420. 00 mm). Moreover, the effective waterholding capacity of 1 m soil layer for growing season varied between 267. 77~327. 42 mm for the mixed stand, alsohigher than those for larch forest(133. 55~227. 23 mm). As a whole, the eco-hydrological function of forest soil ofmixed stand was better than that of the larch forest. In addition, itwas found that the non-cap illary ratio and cap illary ratio in the effective water holding capacity of 1 m soil layer were 36. 6% and 63. 5% for both stands. Thismeaned that the effective soil water holding capacity, non-capillary water holding capacity, cap illary water holdingcapacity had the equal power as indicator in evaluating the water holding capacity of a thicker soil layer.
Study on the Anamorph and Spec ies of Botryosphae ria,the Important Pathogen of Tree’s Canker
WANG Jin-li, HE Wei, QIN Guo-fu, TAO Wan-qiang, ZHAO Jun, TIAN Shu-min
2007, 20(1): 21-28.
Abstract:
The authors collected canker specimens on many trees in China and isolated the pathogen and inoculatedPopu lus ×beijingensis in order to confirm pathogenicity. The morphologic method and ISSR technique were app liedto analyze the phylogeny, and the resultwas compared to foreign’s. According to the morphologic character of conidiophore, The species collected was B otryosphaeria doth idea, whose morphological character of anamorph accordedwith Fusicoccum aescu li reported by foreign countries. According to the dendrogram generated byUPGMA cluster analysis of the ISSR fingerp rints from the cuthors’isolates and F. aesculi come from foreign countries, both were classified to one cluster by similarity 100%. So the authors concluded that the pathogen of canker collected wasB. doth idea, which anamorph was notDothiorella grega ria, but F. aesculi, and F. aesculi could be used as anamorph ofB. dothidea. Moreover, B. ribis was not obtained in the experiment, but itwas different from B. dothidea in China, according to the character ofB. ribis was republished abroad. The conidialwidth ofB. ribis was over 8. 0μm, but the conidialwidth ofB. dothidea was 6. 2~7. 6 μm. The ratio of conidial length and width ofB. dothidea wasover 2. 9, but B. ribis was below 2. 6. It could be concluded that B. ribis and B. dothidea were different speciesfrom the dendrogram generated by UPGMA cluster analysis of the ISSR fingerp rints. So, B. ribis and B. dothideawere different species, not synonym.
Studies on Introduction and Cultivation ofAesculus from North American
ZHOU Zhi-chun, JIN Guo-qing, ZHANG Jun-min, FEI Xue-qian, WU Yun-sheng
2007, 20(1): 29-34.
Abstract:
Aesculus pavia, A. g labra, A. octandra and A. hippocastanum from North America w ere introduced andcu ltivated in Tong lu o fZhejiang, China. A four-year introduction experiment show ed thatA esculus from North America g rew more slow ly than that o fZhejiang buckeye in early stage. O f the four introducedAesculus species, A. octandra, A. pavia. and A. glabra. show ed better grow th performance. Though the young seedlings and 2 years o ld sproutand leaf of in troduced A esculus w ere more sensitive to the in jury by high temperature in comparison w ith Chinesebuckeye , the ir adaptation to h igh temperature and grow th increm ent would increase cont inuously w ith age. Thus,they w ere fit to be introduced into E ast of China, while A. h ippocastanum, which w as sensit ive to low temperatureand g rew more slow ly, w as unf it fo r introduct ion. Observa tions show ed thatA. pavia and A. g labra could b loom at1 year and 3 years o ld respect ive ly, wh ileA. octandra had the fastest grow ing speed, wh ich w as no t less than tha t ofZhejiang buckeye. Seeds ofAesculus may easily rot and lose v igor, but timely harvest and sto ring in sand of green-house could contro l the ratio of rotting be ing low er than 10%. For long transportat ion o f seeds in w in ter, litt le pack-ing w ou ld be helpful for keep ing seed qua lity. The number of lateral root o fAesculusw as little, bu t st imu lating germ i-nation by sto ring seed in sand and transp lanting w ith cutting roo t m ight enhance root development and seedling grow th. In high-temperature summer at seedling stage, shad ing by black netw ith light transm ittance 50% was help-fu l for seedling s grow th. Cult ivat ion of good-sized seedling s in nursery require contro lled p lanting density, ample fert ilizer, plenty w ater and finemanagemen,t whichm ight promo te the form ation of plump top bud and would be goodfor the growth of next year.
Geographical Differentia tion for Seedling Growth and Morphology ofManglie tia yuyuanensis Provenances
LI Yin-gang, ZHOU Zhi-chun, JIN Guo-qing, FAN Hui-hua, WANG Yue-sheng
2007, 20(1): 35-39.
Abstract:
M ang lietia yuyuanensis p rovenance trails including twelve seed sources from p rimary natural distribution zone, located at Chun’an of Zhejiang and J ian’ou of Fujian, were used to study p rovenance variation forseedling characteristics such as seedling growth, seedling shoot elongation parameters, leaf morphology, rootcharacter and dry matter accumulation. The results indicated that there existed significant differences amongp rovenances for seedling traits including seedling growth, leaf morphology, dry matter accumulation, tap rootlength and root range. Owing to the relative poor lateral roots ofM ang lietia yuyuanensis, p rovenance variationof first2class lateral root amount and the longest lateral root length could not reach significant level in statistics,but the biggest value was 2. 8 times that of the smallest one. Provenance variation ofmost seedling growth andmorphology characteristics was under the double control of longitude and latitude and had higher height andbasal diameter growth, larger seedling shoot elongation of its seed source. Compared with the northern and eastern p rovenances, the southern and inland p rovenances had more branches, more and wider / longer leaves. According to the result of seedling provenances, five good p rovenances (Quannan and Longnan of J iangxi, L iancheng, Shaxian and Jiangle of Fujian) were selected whose seedling height growth was 8199% ~56. 28%higher than the control .
Study on Variations of Young Forest Growing Traits of Choerospondiasax illaris Geographic Provenances
HE Gui-ping, CHEN Yi-tai, YU Yuan-hua, JIN Qi-xiang
2007, 20(1): 40-44.
Abstract:
The affforestation provenance trial o fChoerospondias ax illaris containing 25 seedlots co llected from 8 provinces ( zone) w as conducted in Shaow u, Fu jian Prov ince. The results show ed that for 4 years o ld young stand, therew ere sign if icant differences in 4 traits: tree heigh,t breast he ight diamater, divarication height and d ivaricat ion nunber, and the broad heritability o f tree he ight and breast he ight d iamaterw ere high. Therew ere significan t differencesin tree heigh,t breast he ight d iam ater and d ivaricat ion height under d ifferen t site. The tree heigh,t breast height diamater and divarication height show ed significan t negat ive re lation to latitude of the seedlots, w hile they show ed nosignifican t negative relat ion to long itude o f the seedlots, the divaricat ion number show ed no significan t re lation to latitude and long itude of the seedlots and tree he igh,t breast height d iam ater, d ivaricat ion heigh.t Four qu ick-grow ingprovenances w ere se lected among young fo res,t .i e. Hezhou, Rongx ian in Guangx ,i Shangyou in Jiangx,i Lechang inGuangdong. Tw o provenance zonew ere districted as system cluster: qu ick-grow ing provenance zone fo rm iddle southsubtropica l and slow-grow ing provenance zone form idd le north-subtrop ica.l
Records of Bamboo Disea ses and the Taxonomyof The ir Pathogens in China( Ⅱ)
XU Mei-qing, DAI Yu-cheng, FAN Shao-hui, JIN Li-xin, LU Quan, TIAN Guo-zhong, WANG Lai-fa
2007, 20(1): 45-52.
Abstract:
208 pathogens, including 183 species of fungi, 1 bacteria, 2 fastidious prokaryotes, 1 virus, 3 nematodes and 18mites, on the 148 bamboo species, 10 genus, 1 subfamily were collected from the relevant references in the period from1975 to 2006. The name, bamboo hosts, pathogens, and provincial distribution of the disease were listed. The taxonomyposition of the pathogens was determined based on the newest taxonomy systems for each category of pathogens ( fungi,bacteria, viruses, nematodes,mites)which belongs to 5 Classes, 22 Orderes, 2 General families, 47 Families, 112 Genus. )Thiswill provide an important reference for understanding the consititutor of ecology system of the bamboo forest, biodiver2sity , prevent and control harmful exotic pests aswell as quarantine and control bamboo diseases.
Study on Techniques and Physiological Indexes ofWalnutGrafting w ith Young Seedling
ZHOU Hua, DONG Feng-xiang, CAO Yan-sheng, XU Ying-chun
2007, 20(1): 53-57.
Abstract:
The integrated exper iment of young w alnut seed ling g raft ing w as carried out in greenhouse to study thetechniques and change of physiolog ical indexes on graft ing uniting process o f walnu.t The result show ed that thetreatm ents of 2 000mg L-1GA3 and p inching enhanced ev ident ly the diameter o f stem of the seedling, the g raftingsurv iva l rate w as above 80% w ith temperature at 26 andmed ia moisture at 410 g?? kg-1 in box with holes. Theyoung seedling had the higher hormones content of IAA, GA3, ZR and IAA /ABA value dur ing the leaves expanded 1~ 10. The physio log ical indexes of stock changed w ith t ime in the process of healing , the content of solub le sugar,pro tein and IAA /ABA value went down at earlier stage, went up in them idd le, then w en t dow n aga in at la te stage,the PPO activ ity had a tendency of opposite, the content of IAA, GA3, ZR dec lined at earlier stage, then went up afterw ards, ABA content rose stead ily in the whole process.
Study on Volatile OilComponents and Activities of Restrainingand Eliminating Supper Oxygen Anion
HE Kai-yue, LI Xiao-chu, ZHANG Shuang-quan, FAN Ying-xin, QIU Jin- fen, BI Hiu-min
2007, 20(1): 58-62.
Abstract:
The vo latile oil from leaves o fT soong iodendron odorum w as iso lated by organic so lvent ex traction and itscomponen ts w ere ana lyzed and quantified by GC /MS /Computer. Meanwh ile, its activ ities of restra ining and elim ina??t ing ultra oxygen an ion w ere detected. The 38 compounds in T . odorum were identified and the m ain constituentsw ere ester ( 33. 396% ), terpeno ids ( 18. 313% ) , a lcohol ( 12. 065% ) and aromatic compounds ( 9. 484% ), Theresu lts show ed that therew ere strong functions of restraining and eliminating ultra oxygen an ion. When the vo latileo ilw as d iluted by 100 times, the act iv ity o f restraining ultra oxygen an ion reached max imum, and its activ ity w asstronger than that o f PG and PA . When d iluted 20 times, the act iv ity of to tal-SOD atta ined 495. 1U mL, amongw hich the CuZn-SOD w as 338. 50U mL-1, the 68. 36% of T-SOD; Mn-SOD w as 156. 70 U mL-1, the 31??64% ofT-SOD.
Primary Investigation of a Host Insect of Cordyceps milita ris andAna lysis of Its Main Ingredients
MA Tao, FENG Ying, WU Xing-ping, ZHANG Yi-hong, MA Yan, WANG Zi-li
2007, 20(1): 63-67.
Abstract:
The Cordyceps m ilitaris found in Zhaotong , Yunnan Province was investigated. The host insect isB iston falcata,which has one generation a year in Zhaotong and overwinters by pupae. The larvae eat the needles of Pinus armandiiFranch, and therefore is a harmful pest of the pine from mid September to earlyOctober. Cordyceps m ilitarismainly livesin armand pine forestwith the altitude of 2 200~2 400 m. Its fruit bodies occur from late July to late September, in themild,moist and rainy habitat. Analysis indicated that the fungus had rich nutrition ingredients including 646. 0 g·kg-1protein, 37. 0 g·kg-1 crude fat, 54. 3 g·kg-1 total sugar, 35 g·kg-1 ash , and 17 kinds of amino acids. Total quantity ofamino acids is 266. 3 g·kg-1. Many kinds of inorganic elements needed in human metabolism are included.
Fertilization of Juvenile Larix kaempferi for NorthernSub??tropicalA lpine Area
SUN Xiao-mei, ZHANG Shou-gong, QI Wan-yi, ZHANG Xian-yan, WANG Jun-hui
2007, 20(1): 68-73.
Abstract:
The in fluence of am ounts, ratios of N, P fertilizer and tim es o f fertilizat ion and the ir in teractions onjuven ile Larix kaempf er i g row th w as stud ied, based on the experim en ta l fertilizat ion forest o f 4×3×2 set upduring E igh th Five-year-plan period in Da lao ling Forestry Farm, Hubei Prov ince. The results show ed that different amounts of fertilization insign ifican tly affected the grow th o fLarix kaempf eri. D ifferences in tree grow th a??mong 3 rat ios ofN, P fert ilizerw ere sign ificant w ith in 3 years after fertilizat ion. G row th decreased w ith the pro??port ion o fN fert ilizer increasing and P fert ilizer decreasing. B y year 1998, the DBH, tree he igh t and vo lum e o fB1 ( the ratio ofN, P fertilizer, 1!0) w as 5. 79% 、6. 58% and 19. 38% respect ive ly h igher than tha t o fB3 ( theratio ofN, P fert ilixer, 1!1) . T imes o f fertiliza tion a ffected the grow th insign ificant ly, and the g row th o f 2 t im esfertilizat ion w as low er than tha t o f one??tim e fertilizat ion. A1 B1 C1 fert iliza tion comb ined m ethod, name ly 25 g fertilizat ion amount, all N fertilizer and one??tim e fert ilization, w as recomm ened for short ro tat ion industrialplanta tion ofL. kaempf eri in northern sub??tropica l a lpine area, o f w h ich d iameter, he ight and vo lume a t 1-??year-old w as 16. 7% 、9. 7% and 26. 2% respect ive ly higher than that of other average.
The Impacts of Pollinating Behaviour of FigWasp on Its Reproduction
XIE Xiao-bo, TAO Mei, PENG Yan-qiong, XU Fa-jian, YANG Da-rong
2007, 20(1): 74-78.
Abstract:
Research w as carried out on the reproductive impacts of d ifferent carry po llen process o f fig-pollinatingw asp o fF icus hisp ida in the trop ica l rainforest of X ishuangbanna. The results show ed that the po llinatorw as activepo llinat ion, and the female figs just produced seeds rather than w asps, wh ile the male figs produced w asps, andthere w as a seed insidema le fig. The po llinator! s foundresses leftm ale??floral fig and looked fo r new receptive fig forreproduct ion. A foundress average ly made 353. 93 ± 91. 72 ga lls, and on ly 283. 28 ?? 101. 42 w asps w ere able tocomp le te life cycles. The rat io of galls and w asps w as 0. 26 and 0. 81 respect ively. In contro lled experimen,t a nofly ing foundress w as introduced inside sing le fig, wh ich itmade 446. 74 ± 60. 06 ga lls and fina lly 386. 15 ±87. 46comp le ted life cycles. The rat io o f galls and w asps w as 0. 31 and 0. 88 respectively. In contras,t no fly ing foundressalw ays reproducedmore o ffspring than that o f flying foundress. Th is implies that carry ing po llen and fly w ould in??crease reproductive costs of fig??po llinating w asp.
Effects ofGlomus etunicatum Inoculation on RootMorpho logy ofBroussonetiapapyrifera Seedlings underWater Stress
SONG Hui-xing, ZHONG Zhang-cheng
2007, 20(1): 79-83.
Abstract:
Effects o f G lomus etunicatum and w ater stress on morpho logy of root system in B roussonetia papyrif eraseedlings were stud ied based on scanner-based image analysis. The results show ed that drought and AM inocu lationhad a large, significant effect on p lant developmen.t Roo t biomass, total root length, root surface area, root vo lume, number o f roo t links and average diameter of root system in B roussonetia papyrif era decreased w ith the reduct ion o f so ilmo isture, w hile theyw ere increased byVAM inocu lation. Spec ial root length in non-AM plants increasedwhen soilmo isturew as reducing, but it w as decreased by AM inoculation.
Effect of Organic Fertilizer and Growth Regulators on Shoots YieldofDendroca lamus latif lorusMunro Plantations Planted on H ills
QIU Er-fa, CHEN Zhuo-mei, ZHENG Yu-shan, HONG Wei, HUANG Bao-Long
2007, 20(1): 84-91.
Abstract:
Through fertilizing organic fertilizer and grow th regulators to D endrocalamus latif lorus shoo t-used forestplanted on h ills w ith quadratic regression orthogonal test design, the shoo ts output and econom ic bene fit w ere analyzed. The resu lts show ed that the range of shoots outpu,t quantity and ind iv idua lw eightw ere 11 451~ 25 440 kg?hm-2, 7 840-15 360 shoots?hm2, and 1. 41~ 1. 66 kg? shoot- 1. Fert ilizing organic fert ilizer and grow th regulatorshad remarkable inf luence on shoots outpu.t Shoots y ield and quantity increased w ith fert ilizer increasing. The re-gression equat ion of shoo ts yie ld and quan tity w ith fertilizer fitted very w el.l The best fertilizing pro ject w as that o r-ganic fertilizer and g row th app lied at 2 484. 8 kg? hm-2, 6. 006 L? hm-2 respective ly. The fertilizing pro ject for thehighest y ie ld w as that organic fertilizer and g row th applied at 2 482. 35 kg? hm-2, 6 L? hm-2. range o f profitw as-5 699. 5~ 7 310. 2 Yuan?? hm2. Fertilizing organic fertilizer had rem arkable influence on pro fi.t The regression equat ion betw een fertilizer and pro fit fitted very w e l.l
The Effects of Postharvest Sodium HypochloriteWater Curing on the SandStorage Quality of Chinese Chestnut (Castanea mollissima )
LIANG Li-song, WANG Gui-xi, YANG Xiao-hu
2007, 20(1): 92-96.
Abstract:
The paper deals w ith the effects of postharvest treatm ents of sod ium hypochlorite ( 100, 500, 1 000 mg?L-1 )w ater curing on quality of Ch inese chestnut(Castaneamollissima B lum e, cv. Y anchang) during sand storage.The results are as fo llow s: Postharvest treatmentsw ith 100 and 500mg? L- 1NaC lO w ater curing cou ld slowdown thehydro lysis o f starch dur ing sand storage, and keep the so lub le sugar contents at the late storage per iod. 1 000mg?L-1N aC lO w ater curing cou ld ma intain the content of pro te in, but therew as no significant difference of protein con??tents betw een other treatments and con tro.l A lcoho l could accumu late in chestnut during w ater curing treatments,and itw as reduced to the level o f contro l during sand storage. NaC lO w ater curing treatmen ts had the remarkab leeffects on prohibiting chestnut from decay and sprou ting, the rate of decay or sprout ing w ere 2% fo r 500 mg? L-1N aC lO and 0% fo r 1 000mg? L-1 NaC lO w hen sand stored for 150 d. The conc lusion w as that 500 and 1 000 mg? L-1 N aC lO w ater curing had better effects on sand storage o f chestnu.
Two New HeartRotD iseases on Hardwoods in TianmuMountain from Zhejiang Province
CUI Bao-kai, SUN Xiang-qian, CHEN Jian-xin, ZHAO Ming-shui
2007, 20(1): 97-100.
Abstract:
Two new diseases on hardwoods in T ianmuMountain w ere recorded from Zhe jiang Prov ince. Laetiporus ver??sisporus( Lloyd) Imazek i and P erenniporia f raxinea ( Bul.l : Fr) Ryvarden w ere the pathogens. Both fung i causedheart ro .t Illustrated descriptions o f the tw o pathogens were given in deta il based on themater ia ls from China.
Study on the Tran spira tion Dynam ic Var ia tion of Phyllostachys edu lis
SHI Jian-min, GUO Qi-rong, YANG Guang-yao
2007, 20(1): 101-104.
Abstract:
Used L i-6400, the transp iration dynamic variation of Phy llostachys edulis was determined in deferent timescales. The results showed that the diurnal variation of transp iration rate ( Tr) changed with season, bimodality insummer and autumn, and single peak curve in winter and sp ring. The annual variation of transp iration followed asingle peak curve, the peak (3. 90 mmolm-2 ·s-1 ) occurred in August, the lowest was only 0. 29 mmolm-2 ·s-1in January, and the annualmean of Trwas 1. 46 mmolm-2 ·s-1. Compared with the photosynthetic dynamic variation of Phy llostachys edu lis, the diurnal variation of transp iration and photosynthesiswere identical in the same season; but the annual variation was difference, three-peak-curve to photosynthesis and single-peak-curve to transp iration
Influence of Drought and Intraspecific Competition onTrees? Electrical Indexes
LIANG Jun, QU Zhi-wei, JIA Xiu-zhen, LIU Hui-wen, ZHANG Xing-yao
2007, 20(1): 105-110.
Abstract:
The results show ed that the trends of decrease of act iv ity of SOD and increase o f content ofMDA and so lu??b le sugar o f all the treatmentsw ere observed from the third day after the cutt ings o fP opulus tomentosa to be appliedw ith drought stress. The trends o f decrease of tree stem capac itance and increase of tree stem impedance w ereshow ed on sligh t and severe drought treatments from the th ird day after applied drought stress, wh ile the sim ilarchanges w ere observed on the contro l from the n in th day. Under intraspec ific competit ion, the stem diameter,he ight, tree stem capacitance and unit capac itance o f h igh density treatmen tw ere sign ificantly low er than that of lowdensity treatm en,t w hile the tree stem impedancew as sign if icantly higher than that o f low density treatmen.t The re??search o f tree stem capacitance and impedance and unit capac itancewould provide a theoretical basis for the quan ti??tative assessment of the degree of damage caused by env ironm enta l stresses.
The Effect of Ac id and Alum inum Stress on Seed Germ ina tion andSeedling Growth of Pinus massoniana
ZHAO Zhi-gang, DING Gui-jie, TANG Min1
2007, 20(1): 111-115.
Abstract:
The effect of acid and aluminum stress on seed germination and seedling growth of Pinus m asson ianaLamb. was studied on the substrates of quartz sand by compounding nutritive liquid commonly used intensively inthe world. The result showed thatmedium intensity of acid and Al3+ did not have significant influence on germination rate and germinating ability, while they had significant negative influence on the growth of seedling root andstem. There was a significant correlation between the growth of root and stem, dryweight, fresh weightwith intensity of acid and Al3+ stress. The seedling growth increased slowly at first and then decreased with pH value changingfrom 5. 5 to 3. 0, the seedling growth decreased with the increase of Al3+ . The seedling growth was op timal in the pHvalue of 4. 5~5. 0. The acid and Al3+ stress had the biggest influence on root, and rootwas the most sensitive part.The percentage of biomass of root decreased with the increasing stress of acid and Al3+ , both stem and leave fluctuated lesser. When pH value was under 4. 5 of nutritive liquid, the concentration of Al3+ was 50 mg·L -1 , whichcould restrain the growth of P. m assoniana sp rout distinctly.
The Influence of Cultivation Conditions on the Growth and DevelopmentofPennisetum a lopecuroides
WU Ju-ying, TENG Wen-jun, WANG Shu-qin, WANG Qing -hai
2007, 20(1): 116-118.
Abstract:
Experim ents w ere conducted to evaluate the effects of shade intensity, time of transp lanting and time ofcutting back w ith or without soil cover on grow th and development ofP ernnisetum alop ecuroides. Plant height andw idth increased, the number of in flo rescense decreased sign ificantly w ith shade in tensity increased. T ransplan tingtime d id not affect overw intering surv iva,l but had a negat ive effects on v isual appea.l To obta in the best visua l ap??pea,l P. alopecuro ides shou ld be transplanted before the end ofMarch in Be ijing reg ion. Overw intering survival ofP. alop ecuroides reached to 100% even w ithout any overw inter ing protection, but soil covering after cu tt ing back be??fo re w inter decreased sign ificantly them ax imum height and the number o f in flo rescence, as w ell as postponed thegrow th and deve lopment ofP. alop ecuroides.
Study on Effects of Pruning to Promote Trunk Extension onPhotosynthetic Characteristics of Paulownia
WANG Bao-ping, LI Ji-yue, QIAO Jie, WEN Rui-jun, ZHOU Hai-jiang, HU Hao
2007, 20(1): 119-124.
Abstract:
Using L i-6400 portable photosynthesis system, the photosynthetic rate o f various crowns and direct ions ofpau lown ia o f tw o treatm ents, responding to d ifferent photosynthetic photon flux density, w eremeasured. Fitting andregression ana lysis w ith the equation Pn = Pmax ( 1- C 0 e- aPPFD / Pmax ) , the parameters w ere calcu lated and stud ied.The result show ed: ( 1) Techn ique o f pruning to promo te trunk extension could improve photosynthe tic capacity andadaptive ab ilities of paulow nia to dealw ith light surround ings. Themax photosynthe tic rate ( Pmax ) , light saturationpo int ( LSP) , light compensate po in t ( LCP) and photosynthet ic range ( PR ) of pruned paulow niaw ere 23. 93 μmol·m-2·s-1, 1 966. 58 μmol·m-2·s-1, 53. 88 μmol·m-2·s-1, 1 911. 71μmol·m-2·s-1. Comparisonsw ith the contro,l the value o f the above parame ters w as 11. 85% , 15. 61% , 29. 06%, 15. 21% higher. ( 2)Techn ique o f pruning to promote trunk extension had greater effect on low er crow n than upper and made the difference betw een the tw o crowns shortened. Pmax, LSP, LCP and PR of low er crow n o f pruned pau lown ia w ere27. 70% , 36. 74% , 34. 22% and 36. 80% higher than that of the contro.l But there w as no sign ificant differencebetw een tw o treatments in the upper crow n. ( 3) E ffects o f pruning to promo te trunk ex tension on photosyntheticcharacter istics of various d irections among the crow ns w ere differen.t The parameters of Pmax, LSP, LCP and PR ofpruned shade leaves and sun leaves of upper crow n w ere h igher than that o f the contro.l But all of them w ere not sig-n if icant differen.t In the low er crow n o f paulown ia, Pmax , LSP, LCP and PR o f the treated sun leaves w ere21. 80% , 39. 02% , 28. 72% and 39. 26% h igher than that of the contro,l and tha t of the treated shade leavesw ere 42. 18%, 39. 35% , 48. 70% and 39. 13% h igher than that of the contro.l Except LCP, the differences o f a llthe parameters be tw een the two treatm ents w ere significan.t
Effect of Mechanical Wounding on the Content of HydrogenPeroxide in Ash leaf Maple Seedlings
ZHANG Wen, SHEN Ying-bai, SHEN Yuan-yuan
2007, 20(1): 125-129.
Abstract:
Using ashleafmaple (Acer negundo ) seed lings as materials, DAB tissue coloration and spectropho tometryasm ethods, the autho rs exam ined and compared the dynam ic concentrations o fH2O2 in d ifferent leaves: the dam??aged leaves, the intact leaves of the ident ical damaged plant and signa l induced leaves o f the neighboring plantsdamaged by 0, 15, 30, 60, 120, 240m inutes. The resu lts show ed that themechanicalwound ing cou ld induce the sys??tem ic concentrations of H2O2, the contents susta ining increased in 60m inutes, and reached the m ax po int at 240m inutes. A fter using theM eJA ( 1 ??mo l·L-1 ) to treat the hea lthy p lants, the concen trat ions o fH2O2 increased dis??t inctly. It could be concluded thatMeJA induced the sim ilar defensive system s instead o fmechan ica lw ounding, byw ay of initial signa ls in plants, and reached the effects of defending env ironmen tw ound.
Comparison on the Photosynthesis of Seedlings ofPrunus serotina and Prunus serrulata
LI Liang-hou, LI Ji-yue, FU Xiang -jian, LI Gao-yang
2007, 20(1): 130-134.
Abstract:
W ith L I??6400 portab le photo synthesis systems, the net photosynthet ic rate ( Pn ) , stom ata l conduct??ance ( G s ) and in terce llu lar CO2 concentra tion ( C i ) under natura l full light cond itions w ere compared forP runus serru lata from Guang shan C ounty , H enan Prov ince, P. serotina from Pennsy lvan ia and On tario. The re??sults show ed that: ( 1 ) P. serrula ta had the max imum da ily averag e amoun t of Pn, Gs, and Ci, w h ich w ere6. 381??mo l·m- 2 ·s-1, 0. 200 mo l·m- 2 ·s-1, and 251. 7 ??mo l·mo l- 1 respect iv ely, and the average a??moun ts of seedling s o f Pennsy lvan ia provenances w ere them ed ium, they w ere 5. 550 ??mo l·m- 2 ·s-1, 0. 151mo l·m- 2 ·s-1, and 234. 7 ??mo l·mo l- 1 respective ly, and the averag e amoun ts o f seed lings o fOn tario prove??nance w ere the least, they w ere 4. 952 ??mo l·m- 2 ·s-1, 0. 134 mo l·m- 2 ·s-1, and 230. 1 ??m ol·mo l- 1respective ly. ( 2) Pn, Gs and C i had sign ifican tly d ifferences among these species. ( 3 ) The da ily variat ion o fPn w as sim ilar, therew as on ly one peak of Pn in a day, bu t the Pn o f p lants of Pennsy lvan ia provenance reached the peak earlier than that o f the o ther tw o k inds of seedling s. The da ily var iation o fC i w as sim ilar, too. C i de??creased gradua lly from mo rn ing to them in imum in the a fternoon and increased a little la ter, bu t the Ci of plantsof Pennsylvan ia provenance fell them in imum earlier than that o f the o ther tw o k inds o f seed lings. The da ily va ri??at ion o fG s w as sim ilar, too.
SurveyMethodolog ies and Techn iques in Wetland Na ture Reserve
FENG Xiao-dong, LIU Xin
2007, 20(1): 135-138.
Abstract:
This essay introduces the state-of-art systematic framework, p riority research area of wetland sciences,specifically discovers the surveymethodologies and techniques in wetland nature reserve, including those about natural setting of wetlands, wildlife resource, wetland vegetation, p rotection and utilization techniques of buffering zoneof the nature resource.
Ster ility of Some Interspec if ic Hybr ids of D endran them a and Its Control
LI Xin-lei, CHEN Fa-di
2007, 20(1): 139-142.
Abstract:
Sterility of some interspecific hybrids ofDendranthem a and its controlmeasureswere studied. By studyingthe characters, pollen fertility and fecundity of self-cross of interspecific hybrid, itwas found that interspecific hybridof Dendranthem a possessed sterility, which characterized as some interspecific hybrids could not flower normally, thepollen fertility and the fecundity of self-crosswere low. The study on controlmeasures of sterility showed that colchicine treatment could overcome sterility of hybrid. The rate of fecundity of back cross of some hybrids exceeded 1. 0and the maximum was 6. 25. Embryo rescue after back cross of hybrid could solve the p roblem of low fecundity ef2fectively, and the rate of p lantlet formation varied from 3. 7% to 25. 0%.
Isozyme Analysis on ExcellentVariety of Cunn ingham ia lanceolata “Dragon15”
QI Ming
2007, 20(1): 143-146.
Abstract:
The resu lts of a series o f progeny tests showed that “dragon15” (Cunninghamia lanceolata ) had the charac??ters of rapid grow th, exce llent quality and h igh resistance. Though a series of exploring experiments bymeans of poly??acrylam ide gel electrophoresis techn ique, 5 a llozyme systems, amounting to 7 allozyme loc,i w ere found ou:t GOT-1,GOT-2, GOT-3, FDH, MNR-2, ME,α-amylase. Genetic types of severa lChinese fir parents in b iclona l seed orchardof 11??year??old were conf irmed by use of allozyme technique. The resu lts indicated there was a obv ious re lationship be??tw een o ffspring? s performances of parent c lones and its heterozygous locus numbers. The genet ic foundation o f bio??chem istry that the offspring of “dragon15” had rap id g row th , ex cellent quality and h igh resistance is because it pos??sessed more heterozygous numbers: 5 of 7 a llozyme loci in tota:l GOT-1, GOT-2, GOT-3, FDH, MNR-2. The hetero??zygous locus numbers cou ld be used to early identification and early selection.
The Biological Characters and Experiments on Introduction andPropagation ofHydrangea strigosa
XIE Yun, LIAO Bo-ru, FAN Yi-rong, WU Xue-min
2007, 20(1): 147-150.
Abstract:
Red-leaf Hydrangea strigosa is an infrequence co lor-leaf flowery frutex. The introduction and propagation experim ents of cutt ings, seedlings and seeds ofw ildHydrangea strigosa were carried out in L inan based on intensive observationof biolog ica l characters o fHydrangea strigosa for 2 years. The results indicated that the introduction and propagation w eresuccessful in the first stage. For cultivation of cuttings, the best tmi e was June, the best substrate was deep soi,l and thebest cutt ingsw ere b iennial or triennial branches, the rooting rate w as 52??7%. T he best tmi e for transplant w ild seedlingsw as in Apri.l Burgeon rate was 45. 3%, while seedling rate w as low, on ly 11. 2%.