摘要
自然干旱是一种干扰。本文研究了极端干旱干扰松嫩草原土壤含水量和植物的反映。结果表明 :极端自然干旱下 ,羊草地上生物量、株高与植物根系集中分布土层的含水量呈显著线性相关 ,相关系数分别为 0 .98和 0 .94;不同生境羊草群落、不同植物群落间土壤含水量和干旱深度差异明显。最后 ,提出了评价自然干旱干扰强度的指标
Natural drought is a kind of disturbance. Authors studied water content in soil and plant's reflection under extreme natural drought on Songnen grassland in this paper. The results show: there exist significantly linear relation between Aneurolepidium Chinensis aboveground biomass and height and water content where the roots of plant were focused,the coefficient indexes are 0.98 and 0.94 respectively, which show the water content and natural drought depth are significantly different. The norms to value the intensity of natural drought disturbance aboveground biomass and water content where the root of plant is focused in native dominant plant community under typical habit are put forward also.
出处
《干旱区资源与环境》
CSSCI
CSCD
2001年第3期52-56,共5页
Journal of Arid Land Resources and Environment
基金
国家重点基础研究发展规划项目 :G2 0 0 0 0 186 0 6
