西北林学院学报2018，Vol.33Issue(2)：43-47,5.DOI:10.3969/j.issn.1001-7461.2018.02.07
藏中半干旱地区不同土地利用类型土壤抗蚀性研究
Soil Anti-erodibility of Different Land-use Modes in Semiarid Region of Central Tibet
摘要
Abstract
It is significant for land-use optimization and resource integration to study the soil anti-erodibility of different land-use modes in semiarid region in central Tibet.In this paper,the soil anti-erodibility was investigated in the cultivated land,artificial forest land,grassland and shrub land based on principal component analysis.The results showed that all the 12 anti-erodibility indices could be optimized to 6 indices,i,e non-water stable aggregates with the size＞ 0.25 mm,average weight diameter of aggregates,soil bulk density,gravel content,moisture content and organic matter content.By the establishment of a comprehensive evaluation model,it was found the anti-erodibility level of those four land-use modes were as follows:artificial forest land (3.55)＞cultivated land (2.45)＞grassland (1.78)＞shrub land (0.05).As a whole,however,the soil anti-erodibility in study area was at a relatively low level.It is necessary to increase farmland shelterbelts and plantations during strengthen environmental awareness of farmers and herdsmen to lead a scientific fertilizing after soil testing,to improve soil structure in the study area and to enhance the soil and water conservation.关键词
藏中半干旱区/不同土地利用方式/土壤抗蚀性/主成分分析Key words
semiarid region of central Tibet/land-use modes/soil anti-erodibility/principal component analysis分类
农业科技引用本文复制引用
聂晓刚,梁博,喻武,万丹..藏中半干旱地区不同土地利用类型土壤抗蚀性研究[J].西北林学院学报,2018,33(2):43-47,5.基金项目
国家自然科学基金项目(41461063) （41461063）
西藏自治区科技厅自然基金项目(2015ZR-13-36). （2015ZR-13-36）
