生态学报2017，Vol.37Issue(18)：6120-6127,8.DOI:10.5846/stxb201606241237
黄土高原阴/阳坡向林草土壤水分随退耕年限的变化特征
Dynamic characteristic of soil water with an increase in restoration years on the shady and sunny slope aspects of the Loess Plateau
摘要
Abstract
This study was conducted in the semi-arid the Loess Plateau of China.On the basis of the differences in soil water content due to different slope aspects,the dynamic characteristic of soil water content in an abandoned farmland and artificial forestland with an increase in restoration years was analyzed,and on the basis of the amount of soil water in a native grassland,the soil water deficit in the artificial forestland on different slope aspects was also analyzed.Overall,thesoil water content in the shady slope was significantly higher than that in the sunny slope;the difference in soil water content between the two slope aspects was 3.1％ for the abandoned farmland;2.6％,native grassland;and 1.5％,artificial forestland.Therefore,the excessive consumption of the artificial forestland with respect to soil water diminished the difference in soil water due to the different slope aspects.The soil water content of the abandoned farmland presented a significantly increasing trend with an increase in restoration years,and the degree of increase would also increase with the increase in restoration years.However,in the artificial forestland,a decreasing trend was observed;for the sunny slope,the degree of decrease in soil water content would decrease with an increase in restoration years at the layers of 0-1 n and 1-2 m;however,the degree of decrease in soil water content at the layers of 2-3 m and 3-4 m would increase with an increase in restoration years,and that was contrary at the shady slope.The soil water deficit in the artificial forestland presented an enhanced trend with the progress of ecological restoration and increase in soil depth.Overall,excepting the layers of 0-1 m,the soil water deficit in the artificial forestland on the sunny slope was lower than that on the shady slope.关键词
土壤水分/坡向/恢复年限/土壤亏缺/黄土高原Key words
soil water content/slope aspect/restoration years/soil water deficit/the Loess Plateau引用本文复制引用
安文明,梁海斌,王聪,王帅,李宗善,吕一河,刘国华,傅伯杰..黄土高原阴/阳坡向林草土壤水分随退耕年限的变化特征[J].生态学报,2017,37(18):6120-6127,8.基金项目
国家自然科学基金项目(41571503) （41571503）
环保公益项目(201409055) （201409055）
