Grow th Characteristics and Cold Resistance of P inus ponderosa

ZHOU Yong-xue; FAN Jun-feng; GONG Yue-hua

This paper a ims at studying the grow th characteristics ofP inus ponderosa on the basis of the field investiga tion data, andmeasuring through experim ent the related index of its cold resistance w hose mechan ism w as analyzed and eva luated. The research w ere as follosw: P. pond erosa had a strong root system; its vertical roots had astrong grow ing ab ility; the seed lings had a h igher surv ival rate; and the diameter grow th o f 1-year-o ld P. ponderosaseedlings was obv iously faster than that ofP. tabulaeformis. Wh ile the grow ing processes of the seedlings of the tw ospeciesw ere sim ilar to each o ther, seven years after its plant ingP. ponderosa began to enter its fast g row ing period,w ith an average annual he ight grow th of 45 cm, and kept increasing. The annua l and to tal d iam eter grow th of P.p onderosa w as obviously faster than that ofP. tabu laeform is, but the heigh t o f the form er w as low er than that of thelatter. The vo lume o f 18-year-o ld P inus ponderosa w as 0. 017 7m3, 10% larger than that ofP. tabulaeform is. Thediameter grow th o f young p lants o fP. p onderosa obv iously varied in different areas, rang ing from 0. 30 to 0. 94 cmyearly. Theme teoro log ica l factors had certa in effects on its grow th, and the inerement increased apparentlyw ith theincreasing of active accumulated tempera ture and sunsh ine-hours. The he ightw as obv iously re lated to the d iameter of the trees, the length o f new ly-grown branches, and its crow n, and the correspond ing coefficient betw een the heightand its diameter increased w ith the grow ing of its age. Themeasurement of co ld resistance show ed that the exudationrate of electro lyte o fP. ponderosa w as higher than that o fP. tabulaeform is at every low-tempera ture phase. The LT50w as - 10. 7℃, w hile that o fP. tabulaeform isw as - 17. 9 ℃. The re lative low content of bound w ater, soluble sugar, K+, Caroteno id and ABA in the leaf tissue ofP. p onderosa w as the interna l cause of its w eak co ld resistance.

1. College o fForestry, N ou thwes tAgricaltu re and Forestry Un ivers ity, Y angling 712100, Shaanx,i china

2. Col lege of Life Science, N ou thwes tAgricaltu re and Forestry Un ivers ity, Yangling?? 712100, Shaanx,i china

Received Date: 2006-12-20

Abstract: This paper a ims at studying the grow th characteristics ofP inus ponderosa on the basis of the field investiga tion data, andmeasuring through experim ent the related index of its cold resistance w hose mechan ism w as analyzed and eva luated. The research w ere as follosw: P. pond erosa had a strong root system; its vertical roots had astrong grow ing ab ility; the seed lings had a h igher surv ival rate; and the diameter grow th o f 1-year-o ld P. ponderosaseedlings was obv iously faster than that ofP. tabulaeformis. Wh ile the grow ing processes of the seedlings of the tw ospeciesw ere sim ilar to each o ther, seven years after its plant ingP. ponderosa began to enter its fast g row ing period,w ith an average annual he ight grow th of 45 cm, and kept increasing. The annua l and to tal d iam eter grow th of P.p onderosa w as obviously faster than that ofP. tabu laeform is, but the heigh t o f the form er w as low er than that of thelatter. The vo lume o f 18-year-o ld P inus ponderosa w as 0. 017 7m3, 10% larger than that ofP. tabulaeform is. Thediameter grow th o f young p lants o fP. p onderosa obv iously varied in different areas, rang ing from 0. 30 to 0. 94 cmyearly. Theme teoro log ica l factors had certa in effects on its grow th, and the inerement increased apparentlyw ith theincreasing of active accumulated tempera ture and sunsh ine-hours. The he ightw as obv iously re lated to the d iameter of the trees, the length o f new ly-grown branches, and its crow n, and the correspond ing coefficient betw een the heightand its diameter increased w ith the grow ing of its age. Themeasurement of co ld resistance show ed that the exudationrate of electro lyte o fP. ponderosa w as higher than that o fP. tabulaeform is at every low-tempera ture phase. The LT50w as - 10. 7℃, w hile that o fP. tabulaeform isw as - 17. 9 ℃. The re lative low content of bound w ater, soluble sugar, K+, Caroteno id and ABA in the leaf tissue ofP. p onderosa w as the interna l cause of its w eak co ld resistance.

HTML

Reference (20)

[1]	吴中伦. 国外树种引种概论[M]. 北京: 科学出版社, 1983: 50 ~52, 135~ 136
[2]	潘志刚, 游应天. 中国主要外来树种引种栽培[M] . 北京: 北京科学技术出版社, 1994: 6~ 10
[3]	樊军锋, 周永学. 美国黄松介绍(译文) [J] . 陕西林业科技, 1998( 4 ): 70~ 73
[4]	陕西省林业科学研究所延安树木园. 黄土高原树木资源收集与引种的研究[J]. 陕西林业科技, 1987 ( 1) : 1~ 8
[5]	唐季林, 徐化成. 油松抗寒性与种源关系的研究[J] . 北京林业大学学报, 1989, 11( 1 ) : 53~ 60
[6]	高俊风. 植物生理学实验技术[M] . 西安: 世界图书出版公司, 2000
[7]	李合生. 植物生理生化实验原理和技术[M] . 北京: 高等教育出版社, 2000
[8]	汤章成. 现代植物生理学实验指南[M] . 北京: 科学出版社, 1999
[9]	周永学, 樊军锋, 杨培华, 等. 陕西陇县引种美国黄松生长调查[J] . 西北林学院学报, 2005, 20 ( 3) : 74 ~ 77
[10]	周永学, 樊军锋, 高建社, 等. 美国黄松在陕西黄土丘陵引种效果分析[J] . 西北农林科技大学学报(自然版), 2005, 33 ( 4) : 83~ 86
[11]	周永学, 樊军锋, 高建社, 等. 引种美国黄松与油松生长特性的比较研究[J] . 林业科技, 2005 ( 5) : 41~ 43
[12]	侯琳, 唐德瑞. 美国黄松个体高生长过程研究[J] . 西南林学院学报, 2003, 23( 1) : 10~ 12
[13]	张立功, 王喜武, 张仁慈, 等. 美国黄松引种研究[J] . 东北林业大学学报, 1997, 25( 2 ) : 9~ 12
[14]	潘晓云, 王根轩, 曹琴东. 兰州地区引种的美国扁桃的越冬伤害与临界致死低温[J]. 园艺学报, 2002, 29( 1) : 63 ~ 65
[15]	杨敏生, 王春荣, 裴保华. 白杨杂种无性系的抗寒性[J] . 东北林业大学学报, 1997, 25( 4 ) : 21~ 24
[16]	史清华, 高建社, 王军, 等. 5 个杨树无性系抗寒性的测定与评价[J] . 西北植物学报, 2003, 23 ( 11) : 1 937~ 1 941
[17]	王荣富. 植物抗寒指标的种类及其应用[J] . 植物生理学通讯,1987 ( 3) : 49 ~ 55
[18]	Gusta L V, Fow ler D B. E ffects of tem perature on deh arden ing andreharden ing ofw in ter cereals [J] . C anada Jou rnal P lan t Science,1976, 56: 673~ 678
[19]	龚月桦, 周永学, 樊军锋, 等. 美国黄松、班克松和油松的抗寒性研究[J] . 应用生态学报, 2006, 17 ( 8) : 1 389~ 1 392
[20]	G illies S L, V idaverW. Resistance to photo dam age in evergreencon ifers[J] . Phys iology Plant, 1990, 80: 148~ 153

Grow th Characteristics and Cold Resistance of P inus ponderosa

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views