%0 Journal Article
%T Development process of crust in black soil of Northeast China.<br>东北黑土结皮发育过程
%A BU Chong-feng
%A WU Shu-fang
%A ZHANG Xing-chang
%A CAI Qiang-guo
%A <br>卜崇峰
%J 应用生态学报
%D 2008
%I 
%X In a simulated rainfall experiment, the microstructure, bulk density, and shear strength of black soil were determined to study the development process of crust during rainfall, and the effects of the crust on soil infiltration. The results showed that with the process of rainfall, surface soil layer became compact, soil shear strength and bulk density increased, and infihration de- creased. In a period of 120 minutes rainfall, a stable crust layer in 3-4 mm thickness formed, whose bulk density increased by 14. 13% and porosity decreased by 6. 45%. The removal of raindrop beat weakened the development of crust, with soil porosity decreased by 3.27% , bulk density increased by 7.11% , and accumulated infiltration increased by 41.1%. The black soil in Northeast China had a stable soil structure, and raindrop beat was the dominant factor resulting in the development of crust. During the process of rainfall, no obvious eluviation was observed.
%K black soil
%K crust
%K development process
%K infiltration
%K simulated rainfall<br>黑土
%K 结皮
%K 发育过程
%K 入渗
%K 模拟降雨
%K 东北黑土
%K 结皮层
%K 发育过程
%K Northeast
%K China
%K black
%K soil
%K process
%K 现象
%K 颗粒
%K 发现
%K 主导因子
%K 结构稳定
%K 累积入渗量
%K 发育强度
%K 处理
%K 雨滴
%K 孔隙度
%K 发生层
%K 降雨历时
%K 入渗能力
%K 表层结构
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=CAB2A79D2C64947B7E476543A381A894&yid=67289AFF6305E306&vid=2A8D03AD8076A2E3&iid=0B39A22176CE99FB&sid=FA88DCCE84EA0A56&eid=FA3423FC1AE95C4E&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=1&reference_num=29