2000 Vol. 13, No. 1
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2000, 13(1): 1-7.
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Abstract:
The effect of agroforestry on environmental quality was studied by isotope trace technique and the field experimentation,the results showed:(1)The capacity of fixing CO2 of the agroforestry was 1.6～2.1 times as much as that of the single agricultural system because of the existence of tree.On an average,the content of CO2 in the agroforestry was 55～95 mL·m-3 lower than that in the single agricultural system.(2)Poplar,willow,wheat and maize could absorb N2O by an certain degree.(3)There were no significant difference about the CH4 content between inside and outside the agroforestry system,i.e,there was no obvious CH4 gas exchange between crops and atmosphere.(4)In the sandy soil area,agroforestry could reduce the transporting dust capacity effectively,and reduce the falling dust capacity by 20%～60%.Wind-protection effect,intensity of turbulent current exchange and soil moisture were the main factors that determined the falling dust capacity.
The effect of agroforestry on environmental quality was studied by isotope trace technique and the field experimentation,the results showed:(1)The capacity of fixing CO2 of the agroforestry was 1.6～2.1 times as much as that of the single agricultural system because of the existence of tree.On an average,the content of CO2 in the agroforestry was 55～95 mL·m-3 lower than that in the single agricultural system.(2)Poplar,willow,wheat and maize could absorb N2O by an certain degree.(3)There were no significant difference about the CH4 content between inside and outside the agroforestry system,i.e,there was no obvious CH4 gas exchange between crops and atmosphere.(4)In the sandy soil area,agroforestry could reduce the transporting dust capacity effectively,and reduce the falling dust capacity by 20%～60%.Wind-protection effect,intensity of turbulent current exchange and soil moisture were the main factors that determined the falling dust capacity.
2000, 13(1): 8-14.
Abstract:
This paper reports the preliminary results of inoculant effect on the growth of Betula alnoides based on a nursery experiment.Seedlings were inoculated with either ECM fungus,VAM fungus or uninoculated as blank controls.The results showed that both fungi could form associations respectively with the roots of seedlings.The average heights of seedlings inoculated with ECM fungi were increased by 92.98%～106.82% compared to those of controls 180 days after inoculation,while the above-ground biomass and under ground biomass increased by 206.43%～554.69% and 202.83%～566.40% respectively.Regarding to the effect of VAM fungal inoculation,the average heights,top biomass and root biomass of inoculated seedlings were respectively increased by 50.48%～63.41%,78.65%～151.04% and 215.25%～311.86% 90 days after inoculation.Furthermore,150～180 day-old inoculated seedlings could be ready for outplanting in the field.This might save the duration time up to 5 more months in nursery according to normal management.These results demonstrated that the seedlings of B.alnoides were greatly dependent on mycorrhizal associations.
This paper reports the preliminary results of inoculant effect on the growth of Betula alnoides based on a nursery experiment.Seedlings were inoculated with either ECM fungus,VAM fungus or uninoculated as blank controls.The results showed that both fungi could form associations respectively with the roots of seedlings.The average heights of seedlings inoculated with ECM fungi were increased by 92.98%～106.82% compared to those of controls 180 days after inoculation,while the above-ground biomass and under ground biomass increased by 206.43%～554.69% and 202.83%～566.40% respectively.Regarding to the effect of VAM fungal inoculation,the average heights,top biomass and root biomass of inoculated seedlings were respectively increased by 50.48%～63.41%,78.65%～151.04% and 215.25%～311.86% 90 days after inoculation.Furthermore,150～180 day-old inoculated seedlings could be ready for outplanting in the field.This might save the duration time up to 5 more months in nursery according to normal management.These results demonstrated that the seedlings of B.alnoides were greatly dependent on mycorrhizal associations.
2000, 13(1): 15-22.
Abstract:
The forest pathogens of root and butt rot in Northeast China are reported,and 49 species are recorded.The host,type of rot and distribution of each species are given according to field inventory.Most of these species are white rot fungi,but some species cause brown rot.Antrodiella albocinnamomea,Armillaria ostoyae,Bjerkandera fumosa,Funalia trogii,Heterobasidion parviporum,Inonotus obliquus,Inonotus pruinosus,Leucophellinus irpicoides,Melanoporia castanea,Onnia tomentosa,Oxyporus sinensis,Parmastomyces taxi,Perenniporia macckiae,Perenniporia subacida,Phellinidium sulphurascens,Phellinus cf.laricis,Phellinus vaninii,Pholiota squarrosoides,Phylloporia ribis,Polyporus fraxineus,Sparassis brevipes,Spongipellis delectans are new pathogens to Chinese forests.The names of some Chinese wood-rotting fungi are re-studied,and they are now treated based on the modern taxonomic system.Some forest pathogens are re-named by interfertility tests, e.g., Armillaria ostoyae,Heterobasidion parviporum and Phellinus yamanoi etc.
The forest pathogens of root and butt rot in Northeast China are reported,and 49 species are recorded.The host,type of rot and distribution of each species are given according to field inventory.Most of these species are white rot fungi,but some species cause brown rot.Antrodiella albocinnamomea,Armillaria ostoyae,Bjerkandera fumosa,Funalia trogii,Heterobasidion parviporum,Inonotus obliquus,Inonotus pruinosus,Leucophellinus irpicoides,Melanoporia castanea,Onnia tomentosa,Oxyporus sinensis,Parmastomyces taxi,Perenniporia macckiae,Perenniporia subacida,Phellinidium sulphurascens,Phellinus cf.laricis,Phellinus vaninii,Pholiota squarrosoides,Phylloporia ribis,Polyporus fraxineus,Sparassis brevipes,Spongipellis delectans are new pathogens to Chinese forests.The names of some Chinese wood-rotting fungi are re-studied,and they are now treated based on the modern taxonomic system.Some forest pathogens are re-named by interfertility tests, e.g., Armillaria ostoyae,Heterobasidion parviporum and Phellinus yamanoi etc.
2000, 13(1): 23-30.
Abstract:
Production cost functions for unbleached masson pine kraft pulp (UBMKP) under different management models were used to determine the economic weights and value to breeding of standing volume,specific gravity and pulp yield and establish corresponding breeding objectives and index selection equations.It was found that importance of breeding objectives was related to cost structures of pulp production.For the pulp mill from growing trees to the production of UBMKP increasing pulp yield and specific gravity had major effects on reducing production cost,since pulp yield and specific gravity primarily influenced the future costs (harvesting,transport,and pulping).Increasing the discount rate should result in decreasing of importance of pulp yield and specific gravity.For a pure forest production system with no affiliation to pulp mill,the breeder’s attention should be focused on genetic improvement of standing volume,not on specific gravity and pulp yield.Sensitivity analysis indicated that economic weights including component costs,rotation and discount rate had minimal effects on the selection decisions.Economic consequences for breeding of pulp production showed that the first-generation improved plantation could be expected to achieve additive annual profit of RMB Yuan 6.6～7.5 million for a pulp company with a mill capacity of 200000 t and self-sufficiency in wood supply.assuming that the ten top trees in every 100 was selected.
Production cost functions for unbleached masson pine kraft pulp (UBMKP) under different management models were used to determine the economic weights and value to breeding of standing volume,specific gravity and pulp yield and establish corresponding breeding objectives and index selection equations.It was found that importance of breeding objectives was related to cost structures of pulp production.For the pulp mill from growing trees to the production of UBMKP increasing pulp yield and specific gravity had major effects on reducing production cost,since pulp yield and specific gravity primarily influenced the future costs (harvesting,transport,and pulping).Increasing the discount rate should result in decreasing of importance of pulp yield and specific gravity.For a pure forest production system with no affiliation to pulp mill,the breeder’s attention should be focused on genetic improvement of standing volume,not on specific gravity and pulp yield.Sensitivity analysis indicated that economic weights including component costs,rotation and discount rate had minimal effects on the selection decisions.Economic consequences for breeding of pulp production showed that the first-generation improved plantation could be expected to achieve additive annual profit of RMB Yuan 6.6～7.5 million for a pulp company with a mill capacity of 200000 t and self-sufficiency in wood supply.assuming that the ten top trees in every 100 was selected.
2000, 13(1): 31-38.
Abstract:
The article studies the effects on spruce-fir forests’litter and soil moisture content and litters’decomposing rate under different management system in north Changbai Mountains.The author indicates that spruce-fir forests’litter layer can retain more water and decompose rapidly after control method.But it hasn’t much difference on soil moisture content.Spruce-fir forests play an important role in this area and should be well protected.The author emphasizes that cutting off should be selected very carefully to maintain the forests’special environment.
The article studies the effects on spruce-fir forests’litter and soil moisture content and litters’decomposing rate under different management system in north Changbai Mountains.The author indicates that spruce-fir forests’litter layer can retain more water and decompose rapidly after control method.But it hasn’t much difference on soil moisture content.Spruce-fir forests play an important role in this area and should be well protected.The author emphasizes that cutting off should be selected very carefully to maintain the forests’special environment.
2000, 13(1): 39-43.
Abstract:
A large scale field experiments were carried out in coastal sandy areas of Yangxi,Huilai and Taishan of Guangdong Province,to evaluate the inoculation effects of Casuarina equisetifolia with Frankia alginate beads.Results showed that tree height,tree diameter at 1.3 m height,N content and Frankia quantity in inoculated trees increased by 6.6%～53.1%, 16.8%～45.9%,18.1%～40.2% and 277.4% respectively than those of uninoculated trees.Soil nutrients except K increased by 64.3%～249.9% compared with those of before afforestation.The inoculation effects could maintained to the 4th year but was much higher in the 2nd year than in the 1st,3rd and 4th year.The response to inoculation displayed distinct differences among sites and Frankia strains.
A large scale field experiments were carried out in coastal sandy areas of Yangxi,Huilai and Taishan of Guangdong Province,to evaluate the inoculation effects of Casuarina equisetifolia with Frankia alginate beads.Results showed that tree height,tree diameter at 1.3 m height,N content and Frankia quantity in inoculated trees increased by 6.6%～53.1%, 16.8%～45.9%,18.1%～40.2% and 277.4% respectively than those of uninoculated trees.Soil nutrients except K increased by 64.3%～249.9% compared with those of before afforestation.The inoculation effects could maintained to the 4th year but was much higher in the 2nd year than in the 1st,3rd and 4th year.The response to inoculation displayed distinct differences among sites and Frankia strains.
2000, 13(1): 44-50.
Abstract:
At the pinnacles of Maolan Karst hilly area,there are 36 spermatophyte species in the 900 m2 sample plot among which 21 have being reproductived and produce ripe seeds by 520.9 seeds per square meter annually.The seed rain of the community is 910.3 seeds per square meter.The number of the germinative seeds in the seed rain which enable the community to regenerate is 314.7 seeds per square meter.The regenerative potential of the community is good because there are lots of germinative seeds of many existed plants in the seed bank at the beginning of the germination of the seed bank.In the natural environment,the germinative seeds in the seed bank germinate from the first ten days of Jan.to the second ten days of May.In the germination season,18 kinds of the germinative seeds in the 900 m2 sample plot germinate to form seedling with the number 7 245.And the number of the survival seedling is 2 970.The community regenerate well.The gymnospermae, Pinus kwangtungensis,Pseudotsuga brevifolia and Calocedrus macrolepis, adapt themselves well to the pinnacles of Maolan Karst hilly area,and will exist for long time.
At the pinnacles of Maolan Karst hilly area,there are 36 spermatophyte species in the 900 m2 sample plot among which 21 have being reproductived and produce ripe seeds by 520.9 seeds per square meter annually.The seed rain of the community is 910.3 seeds per square meter.The number of the germinative seeds in the seed rain which enable the community to regenerate is 314.7 seeds per square meter.The regenerative potential of the community is good because there are lots of germinative seeds of many existed plants in the seed bank at the beginning of the germination of the seed bank.In the natural environment,the germinative seeds in the seed bank germinate from the first ten days of Jan.to the second ten days of May.In the germination season,18 kinds of the germinative seeds in the 900 m2 sample plot germinate to form seedling with the number 7 245.And the number of the survival seedling is 2 970.The community regenerate well.The gymnospermae, Pinus kwangtungensis,Pseudotsuga brevifolia and Calocedrus macrolepis, adapt themselves well to the pinnacles of Maolan Karst hilly area,and will exist for long time.
2000, 13(1): 51-56.
Abstract:
local species of insects feeding on Eucalyptus were fouded in China,which belong to 10 order and 50 genera.149 species are widely distributed in Orient region, accounting for 71.98%,and 58 species across fauna,amount to 28.02%.Up to now,no pest insect with origin in China have been found.In order to protect the inbreak of the pest,it is necessary to conduct quarantine on pest of Eucalyptus.
local species of insects feeding on Eucalyptus were fouded in China,which belong to 10 order and 50 genera.149 species are widely distributed in Orient region, accounting for 71.98%,and 58 species across fauna,amount to 28.02%.Up to now,no pest insect with origin in China have been found.In order to protect the inbreak of the pest,it is necessary to conduct quarantine on pest of Eucalyptus.
2000, 13(1): 57-62.
Abstract:
Pseudasphondylia diospyros mainly damages the local variety of Diospyros kaki in Lanxi City of Zhejiang Province,the larvae feed on under barks of new branches,form galls,and heavily reduce the yield of fruits.This cecidomiid has only one generation in Lanxi,overwinter by first instar larvae in shoots.The adults hatch normally in the early of May,the adult population density can be affected by rainfall,the high density occurred in wet year,low density occurrs in dry year especially dry Spring season.The population density is higher in grafting seedling when local variety Dahongshi as cion than any other varieties,and it is higher in Spring shoots than in Summer and Autumn shoots.It is found that there are three parasitoids on the cecidomiids,i.e.Eurytoma nigrita,Eupelmus urozonus and Cerambycobius sp..The control strategy is to spray insecticides when the most cecidomiid adults emerge,combined with quarantine,culture control measures, concordant of biological and chemical control measures.The relations between occurrence and environment effects were also discussed.
Pseudasphondylia diospyros mainly damages the local variety of Diospyros kaki in Lanxi City of Zhejiang Province,the larvae feed on under barks of new branches,form galls,and heavily reduce the yield of fruits.This cecidomiid has only one generation in Lanxi,overwinter by first instar larvae in shoots.The adults hatch normally in the early of May,the adult population density can be affected by rainfall,the high density occurred in wet year,low density occurrs in dry year especially dry Spring season.The population density is higher in grafting seedling when local variety Dahongshi as cion than any other varieties,and it is higher in Spring shoots than in Summer and Autumn shoots.It is found that there are three parasitoids on the cecidomiids,i.e.Eurytoma nigrita,Eupelmus urozonus and Cerambycobius sp..The control strategy is to spray insecticides when the most cecidomiid adults emerge,combined with quarantine,culture control measures, concordant of biological and chemical control measures.The relations between occurrence and environment effects were also discussed.
2000, 13(1): 63-70.
Abstract:
Based on the investigation on bamboo mildew-rotting in Zhejiang,Fujian,Hunan and Jiangxi provinces which are China’s dominant bamboo timber production area,the type of bamboo mildew-rotting and the relation between its occurrence and environmental condition were studied and analyzed.The mildew and rot can be divided into 4 types,i.e.fragmentary distribution,even distribution,covered by hyphae and rot.Each type correlates with certain environmental condition.It is considered that the different humidity,temperature lead to the variance of mildew-rotting type.Some suggestions such as improving environment,controlling humidity and temperature were put forward in order to prevent bamboo products from being mildewed and rotted.
Based on the investigation on bamboo mildew-rotting in Zhejiang,Fujian,Hunan and Jiangxi provinces which are China’s dominant bamboo timber production area,the type of bamboo mildew-rotting and the relation between its occurrence and environmental condition were studied and analyzed.The mildew and rot can be divided into 4 types,i.e.fragmentary distribution,even distribution,covered by hyphae and rot.Each type correlates with certain environmental condition.It is considered that the different humidity,temperature lead to the variance of mildew-rotting type.Some suggestions such as improving environment,controlling humidity and temperature were put forward in order to prevent bamboo products from being mildewed and rotted.
2000, 13(1): 71-74.
Abstract:
Cuttings of Populus berolinensis were treated by water stress.The changes of stomatal aperture were observed by scanning electron microscope (SEM).Ion contents in guard cells were analysed by SEM X ray microanalysis.The results indicated that stomata almost closed by strong water stress.When stomatal closure, K+ content decreased and Ca2+ content increased obviously in guard cells.It suggests that K+ and Ca2+ might regulate the stomatal movement.The flux of K+ and Ca2+ might play an important role in stomatal opening and closing.
Cuttings of Populus berolinensis were treated by water stress.The changes of stomatal aperture were observed by scanning electron microscope (SEM).Ion contents in guard cells were analysed by SEM X ray microanalysis.The results indicated that stomata almost closed by strong water stress.When stomatal closure, K+ content decreased and Ca2+ content increased obviously in guard cells.It suggests that K+ and Ca2+ might regulate the stomatal movement.The flux of K+ and Ca2+ might play an important role in stomatal opening and closing.
2000, 13(1): 75-79.
Abstract:
The lack of fit test was introduced to test aptness of some height diameter(H-D) models.The full model and reduced model test were employed to test whether it was reasonable to set some parameter of three-parameter H-D models a fixed value,with the result that two parameter models were enough to describe H-D relationship.With the comparison of six two parameter H-D models,the commonly used power function H=aDb,the hyperbolic function H=aD/(D+b) and the specail case of Richards function suggested by this paper H=a(1-e-0.05D)c gave the most satisfactory results,thus were recommended as the basic H-D models.
The lack of fit test was introduced to test aptness of some height diameter(H-D) models.The full model and reduced model test were employed to test whether it was reasonable to set some parameter of three-parameter H-D models a fixed value,with the result that two parameter models were enough to describe H-D relationship.With the comparison of six two parameter H-D models,the commonly used power function H=aDb,the hyperbolic function H=aD/(D+b) and the specail case of Richards function suggested by this paper H=a(1-e-0.05D)c gave the most satisfactory results,thus were recommended as the basic H-D models.
2000, 13(1): 80-85.
Abstract:
The provenance test at seedling stage was carried out at the nursery of Changle Forestry Farm in Yuhang City,Zhejiang Province in 1997 with the 50 provenance seeds collected from the distribution area fo C.comphora(L.) Presl in 1996.Seedling biomass and relative traits were observed and the relationship among traits was analyzed with variance analysis,relationship analysis and comprehensive index selection.The results show that there is extreme significant difference on the seedling biomass among provenances and extreme significant relationship among 9 traits including seedling height and seedling ground diameter,in which the ground diameter is a leading factor related to the seedling total biomass.Also,five superior provenances were selected with the comprehensive index selection,they are Lianzhou (Guangdong),Jinganshan(Jiangxi),Jianou(Fujian),Qingyuan(Zhejiang)and Shanhang (Fujian) provenances.
The provenance test at seedling stage was carried out at the nursery of Changle Forestry Farm in Yuhang City,Zhejiang Province in 1997 with the 50 provenance seeds collected from the distribution area fo C.comphora(L.) Presl in 1996.Seedling biomass and relative traits were observed and the relationship among traits was analyzed with variance analysis,relationship analysis and comprehensive index selection.The results show that there is extreme significant difference on the seedling biomass among provenances and extreme significant relationship among 9 traits including seedling height and seedling ground diameter,in which the ground diameter is a leading factor related to the seedling total biomass.Also,five superior provenances were selected with the comprehensive index selection,they are Lianzhou (Guangdong),Jinganshan(Jiangxi),Jianou(Fujian),Qingyuan(Zhejiang)and Shanhang (Fujian) provenances.
2000, 13(1): 86-92.
Abstract:
The results of this investigation indicated that 0.2%～1.0% antyphen could promote rooting of Eucalyptus cuttings.The action patterns of antyphen were as following:1.The action result of antyphen on the cuttings of Eucalyptus urophylla MLA clone,which was difficult-to-root,was better than that on the cuttings of E.ABL 12 W5 clone,which was easy-to-root.2.The rooting promoting results of antyphen on Eucalyptus cuttings was better than that of plant growth regulator indolebutyric acid.3.The use of antyphen together with indolebutyric acid didn’t have cooperativity in rooting promoting.4.The action results of antyphen were influenced by different seasonal factors.
The results of this investigation indicated that 0.2%～1.0% antyphen could promote rooting of Eucalyptus cuttings.The action patterns of antyphen were as following:1.The action result of antyphen on the cuttings of Eucalyptus urophylla MLA clone,which was difficult-to-root,was better than that on the cuttings of E.ABL 12 W5 clone,which was easy-to-root.2.The rooting promoting results of antyphen on Eucalyptus cuttings was better than that of plant growth regulator indolebutyric acid.3.The use of antyphen together with indolebutyric acid didn’t have cooperativity in rooting promoting.4.The action results of antyphen were influenced by different seasonal factors.
2000, 13(1): 93-96.
Abstract:
The effects of different temperature (80,100,120 ℃) and duration (1,2 and 3 hours) of second drying on the quality and ingredient composition of Eucommia green tea during refined processing were studied.The results showed that the contents of chlorophyll,phenophytin,protein,amino acid and flavonides declined with the temperature raising and duration prolonging,especially in the temperature of 120 ℃.The decline of chlorophyll and amino acid was faster than that of pheophytin and protein.The content of amodori compounds increased in the first hour of second drying with higher range in 100 ℃ and 120 ℃ than in 80 ℃,but it declined later continuously.The higher the temperature,the faster the decline.Organoleptic evaluation on the comprehensive quality,it is showed that second drying for 1～2 hours under the temperature of 100 ℃ or 2～3 hours under the temperature of 80 ℃ was benefit for the formation of high quality Eucommia green tea.
The effects of different temperature (80,100,120 ℃) and duration (1,2 and 3 hours) of second drying on the quality and ingredient composition of Eucommia green tea during refined processing were studied.The results showed that the contents of chlorophyll,phenophytin,protein,amino acid and flavonides declined with the temperature raising and duration prolonging,especially in the temperature of 120 ℃.The decline of chlorophyll and amino acid was faster than that of pheophytin and protein.The content of amodori compounds increased in the first hour of second drying with higher range in 100 ℃ and 120 ℃ than in 80 ℃,but it declined later continuously.The higher the temperature,the faster the decline.Organoleptic evaluation on the comprehensive quality,it is showed that second drying for 1～2 hours under the temperature of 100 ℃ or 2～3 hours under the temperature of 80 ℃ was benefit for the formation of high quality Eucommia green tea.
2000, 13(1): 97-102.
Abstract:
The cloning and applications of the plant anthocyanin biosynthetic genes,flower organ identity genes and flower senescence genes were reviewed .Plant anthocyanin biosynthetic pathways and involved enzymes were well characterized.Many structural and regulatory genes controlling flower color were cloned.Using direct gene introduction,anti sense RNA and co-suppression techniques,some flower plant cultivars with different colors were obtained.Flower pattern can be changed from modifying the genes controlling flower organ identity.The cloned genes opened up a wide range of application in plant science research,such as create cultivars with new flower color,new leaf color,new flower form,and postpone cutting flower period.
The cloning and applications of the plant anthocyanin biosynthetic genes,flower organ identity genes and flower senescence genes were reviewed .Plant anthocyanin biosynthetic pathways and involved enzymes were well characterized.Many structural and regulatory genes controlling flower color were cloned.Using direct gene introduction,anti sense RNA and co-suppression techniques,some flower plant cultivars with different colors were obtained.Flower pattern can be changed from modifying the genes controlling flower organ identity.The cloned genes opened up a wide range of application in plant science research,such as create cultivars with new flower color,new leaf color,new flower form,and postpone cutting flower period.
2000, 13(1): 103-106.
Abstract:
The hyperparasite Sphaerellopsis filum parasitizing on Hedysarum mongolicum rust (Uromyces hedysari-mongolici) forms conidia after 10 days at the temperature of 20 ℃ on PDA,and yellow white spore horn was also produced after 12 days.The teliospore and urediospore of U.hedysari-mongolici parasitized by S.filum faded colour,the cell wall destructed and the cell contents released in the late stage.The germination rate of parasitized teliospore lowered by 40%.To control H.mongolicum rust,the spore suspension of the hyperparasite was inoculated on uredium.The results of 3 years’ investigation in field showed that the degree of the rust infestation decreased with the increase of parasitization of S.filum in the forest.It seems that S.filum has good potential to be an effective biological control agent of the H.mongolicum rust.
The hyperparasite Sphaerellopsis filum parasitizing on Hedysarum mongolicum rust (Uromyces hedysari-mongolici) forms conidia after 10 days at the temperature of 20 ℃ on PDA,and yellow white spore horn was also produced after 12 days.The teliospore and urediospore of U.hedysari-mongolici parasitized by S.filum faded colour,the cell wall destructed and the cell contents released in the late stage.The germination rate of parasitized teliospore lowered by 40%.To control H.mongolicum rust,the spore suspension of the hyperparasite was inoculated on uredium.The results of 3 years’ investigation in field showed that the degree of the rust infestation decreased with the increase of parasitization of S.filum in the forest.It seems that S.filum has good potential to be an effective biological control agent of the H.mongolicum rust.
2000, 13(1): 107-110.
Abstract:
The rinds of moss, Kaburagia rhusicola winter host,were brought from Zhushan County to Wuhan and planted in containers.The containers were put in damp woods with scattering light.After one year’s observation and study,it is found that these rinds of moss not only can be alive outdoors in Wuhan,but also grew well.The vigorous growth period of Erythrodontium leptothallum, the dominant winter host of K.rhusicola, was from July to next February,the branch growth climax period was January and the fastest growth period of shoot was October.Thruidium kanedae grew most of the new branches and grew the fastest in November.
The rinds of moss, Kaburagia rhusicola winter host,were brought from Zhushan County to Wuhan and planted in containers.The containers were put in damp woods with scattering light.After one year’s observation and study,it is found that these rinds of moss not only can be alive outdoors in Wuhan,but also grew well.The vigorous growth period of Erythrodontium leptothallum, the dominant winter host of K.rhusicola, was from July to next February,the branch growth climax period was January and the fastest growth period of shoot was October.Thruidium kanedae grew most of the new branches and grew the fastest in November.
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