摘要
本文针对绿洲边缘天然白刺灌丛植被退化发生机制 ,采取平茬和人工降雨两种措施 ,从白刺灌丛的生长量、生物量、物种多样性以及沙丘内部水分变化量等方面入手 ,对白刺灌丛的复壮进行了初步的研究。平茬可在一定程度上促进白刺个体的生长并较小范围内改善浅层土壤水分条件。对结皮不同程度处理并结合人工降雨措施 ,均能促进白刺灌丛的生长 ,对浅层土壤水分条件具有较大幅度的影响 ,但对深层土壤水分条件不产生影响。 0 - 1 40cm范围内土壤水分条件的优劣是白刺灌丛生存生长的关键因素之一 ,改善该范围内沙丘内部水分条件对白刺灌丛的复壮具有重要的意义。
According to the degradation reasons of Nitraria shrub and by the two measures of manual rainfall and cutting,the growth\,biolmass\,species diversity and soil moisture content were analyzed.In some degree,cutting promoted the growth of Nitraria and slightly improved soil moisture in the shallow soil layers,Soil-crust-destroy combined with manual rainfall could promote the growth of Nitraria and improve soil moisture in the shallow soil layers,but not in the deep soil layers.Soil moisture in the range of 0-140cm was one of mainly limited factors that influenced growth of Nitraria,and improvement of soil moisture had important signification for promoting reconstruction of Nitraria shrub vegetation in oasis boundary.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2005年第1期167-171,共5页
Journal of Arid Land Resources and Environment
基金
国家林业局科技成果 (中式 )计划项目 :[2 0 0 0 ] 12号
甘肃省林业重点项目 :QS92 -C3 1-0 10
甘肃林业重点项目 :QS0 12 -C3 1-16
关键词
白刺灌丛
植被
人工降雨
平茬
结皮
处理方法
沙丘
Oasis boundary
Nitraria shrub
degenerated vegetation
soil crust destroy
cutting
manual rainfall
