西藏砂生槐水土保持效益分析  

Benefit of Soil and Water Conservation for Sophora moorcroftiana in Tibet

作　　者：曾加芹[1] 田兴军[2] 刘杨军[1] 池瞻仲[1] 

机构地区：[1]西藏农牧学院资源与环境学院,西藏林芝860000 [2]南京大学生命科学院,江苏南京210093

出　　处：《防护林科技》2015年第8期4-6,12,共4页Protection Forest Science and Technology

基　　金：2014年西藏自治区高等院校教师实践实战能力提升计划项目;2015年西藏自治区大学生创新性项目

摘　　要：通过对雅江下游砂生槐水土保持功能进行的试验研究,结果表明:砂生槐的枝叶及枯落物可截留和吸收大量降雨,减小雨水对土壤的侵蚀,植被覆盖度越大,效果越明显;枯落物及根系的活动明显地改善土壤理化学性质,降低土壤容重,增加土壤孔隙度,提高土壤保水和透气能力等。砂生槐枝叶茂盛,根系发达,可作为保水保土、退耕还林还草的树种大面积推广。The function of water and soil conservation of Sophora moorcroftiana in the downstream of the Brahma-putra River was studied.Result shows that the branches,leaves & litter of Sophora moorcroftiana can intercept and absorb the heavy rainfalls and reduce the soil erosion caused by rainwater.The more vegetation coverage have, the more obvious effects show.The litter & root activities of Sophora moorcroftiana significantly improve the physical & chemical properties of soil,decrease the soil bulk density,increase the soil porosity and enhance the soil capacity of water retention and permeability.Sophora moorcroftiana can be widely generalized as a tree species of preserving soil and water and returning cropland to forestry and grass due to its flourishing branches and leaves and developed root.

关 键 词：砂生槐 水土保持 植株持水量 土壤理化性质 

分 类 号：S793[农业科学—林木遗传育种]