水土保持学报2012，Vol.26Issue(1)：47-52,6.
黄土高原沟壑区藻类结皮的水土保持效应
Effects of Soil and Water Conservation of Algae Crust in Hilly and Gully Regions on Loess Plateau
摘要
Abstract
The effect of soil and water conservation of algae crust widespread in hilly and gully regions on Loess Plateau had been researched from two aspects which were rainfall infiltration-runoff and evaporation of soil water.The results were as follows： ①Algae crust could increase the 0-10 cm depth soil porosity.The maximum increase of total porosity was 7.4%,and the capillary was 14.2%.Algae crust had no significant effect on the soil porosity of the deeper layer.②In wasterland,mongolian scotch pine and Chinese pine forest,the runoff between the algae crust and non-crust had a significant difference.Compared with the runoff of non-crust,the runoff of algae crust in the three types of vegetation reduced by 28.1%～32.5%,34.4%～43.1% and 30.8%～31.6%.③In the three types vegetation,the amount of soil erosion between algae crust and non-crust had a significant difference.Compared with the amount of soil erosion of non-crust,the amount of soil erosion of algae crust in the three types of vegetation reduced by 58.8%～70.6%,48.9%～62.6% and 38.3%～57.1%.④By stepwise regression analysis,the different regression equations between runoff,soil erosion of algae crust and rainfall factor in different vegetation types could be obtained.⑤The soil moisture of 20-60 cm depth could be affect by algae crust.In this depth the soil moisture of algae crust was significantly higher than non-crust zone.关键词
藻类结皮/地表径流/土壤侵蚀/土壤水分/黄土高原Key words
algae crust/runoff/soil erosion/soil moisture/Loess Plateau分类
农业科技引用本文复制引用
康磊,孙长忠,殷丽,汤志敏,贺淑霞..黄土高原沟壑区藻类结皮的水土保持效应[J].水土保持学报,2012,26(1):47-52,6.基金项目
国家自然科学基金项目 （）
