摘要
通过对晋西黄土区坡面不同密度刺槐林分生物量与生长规律的研究表明:刺槐的生物量与密度密切相关,在密度小于2000株/hm2时,生物量与密度呈正相关,而在密度大于2000株/hm2时,生物量迅速降低,在密度为2000株/hm2时,生物产量达到最大。研究区内刺槐林分的测树指标之间、林木营养器官之间存在着极其显著的相关性。运用Logistic方程可以很好地拟合当地刺槐的生长过程,对方程进行二次求导得到不同密度的胸径与树高的速生期及速生点;当地刺槐利用应在20年以内。图1,表4,参5。
Observation and analysis were conducted on stand of Robinia pseudoaeacio of different density on slope in Loess Area in the west of Shanxi Province. Biomass of trees and planting density were. closely related. Biomass of trees increased as the density increased when the density was less 2000 plants per hectare.Biomass of trees deceased rapidly when the density was greater than 2000 plants per hectare.of Highest biomass was found in 2000 plants per hectare.Significant correlations were found among breast diameter, height, crown size, bionmass, branches and leaves. Logistic equation can well simulate the curve of growth of Robinia pseudoaeacio. The optimum use of Robinia psedoaeacio trees should be finished before 20 years.
出处
《农业系统科学与综合研究》
CSCD
2006年第1期46-49,共4页
System Sciemces and Comprehensive Studies In Agriculture
基金
国家"十五"重点科技攻关项目(2001BA510B01)
国家"973"项目(2002111503)
教育部霍英东青年教师基金(81026)
关键词
黄土高原
刺槐
密度
生物量
生长
loess area
Robinia pseudoaeacio
density
biomass
curve of growth
