耕作导致的土壤再分布对土壤水分入渗的影响
苏正安1,2,3; 张建辉1,2
刊名水土保持学报
2010
卷号24期号:3页码:194-198
关键词耕作侵蚀 耕层深度 土壤紧实度 入渗 坡耕地
ISSN号1009-2242
其他题名Impacts of Soil Redistribution by Tillage on Soil Water Infiltration
通讯作者张建辉
中文摘要利用梯级法、DEM和模型法研究三峡库区传统锄耕条件下的耕作侵蚀速率,同时采用双环法测定未进行耕作扰动区、耕作侵蚀区和堆积区土壤入渗特性的变异。结果表明,本研究区坡度为12.63%的线性坡的单次耕作侵蚀速率为25.02 t/hm2;各小区的土壤入渗速率和入渗时间均可以用Kostiakov公式(f=a·t-b)进行很好的拟合,然而耕作侵蚀区、耕作堆积区和未扰动区之间由于土壤紧实度和耕层深度变化而对土壤水分的入渗特性具有非常显著的影响。相对于耕作堆积区,耕作侵蚀区的土壤初始入渗速率、稳定入渗速率和累计入渗量均具显著减低,因而会显著地加强水蚀作用。与此同时,单纯耕作松土导致的土壤紧实度变小被证明能够显著增强土壤入渗能力,因而能够显著地增加入渗量,从而减少水蚀强度。 
英文摘要 Tillage erosion rates under conventional hoeing tillage on the linear slope were assessed using the digital elevation model ( DEM), trapezoid-step method and tillage erosion model. And the field doublering method was used to examine soil infiltration on a purple soil of the uncultivated plot, tillage erosive region and accumulative region.
The results showed that mean soil flux rates due to tillage erosion which obtained by DEM and trapezoid-step method was 25. 02 t/ hm 2on the linear slope. Meanwhile, the process of infiltration in the uncultivated land, tillage erosive region and accumulative region could be well described with the equation of Kostiakov ( f = a# t- b) . Since soil com-paction and depth of tillage layer has significant difference between the tillage erosive region and accumulative region, there were significant differences in the process of infiltration between two regions. Compared to the accumulative region, there is a significant reduction of initial infiltration rate, steady infiltration rate, and cumulative infi-l
tration in the tillage erosive region, resulting in more serious water erosion. Meanwhile, tillage operation which decreases soil compaction will increase water infiltration and reduce water erosion.
学科主题S152.7
收录类别CSCD ; 北大中文核心
资助信息中国科学院山地灾害与地表过程重点实验室开放研究基金;国家自然科学基金(40771027)
语种中文
CSCD记录号CSCD:3963082
公开日期2014-01-21
内容类型期刊论文
源URL[http://ir.imde.ac.cn/handle/131551/6795]  
专题成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
作者单位1.中国科学院山地灾害与地表过程重点实验室
2.中国科学院水利部成都山地灾害与环境研究所
3.中国科学院研究生院
推荐引用方式
GB/T 7714
苏正安,张建辉. 耕作导致的土壤再分布对土壤水分入渗的影响[J]. 水土保持学报,2010,24(3):194-198.
APA 苏正安,&张建辉.(2010).耕作导致的土壤再分布对土壤水分入渗的影响.水土保持学报,24(3),194-198.
MLA 苏正安,et al."耕作导致的土壤再分布对土壤水分入渗的影响".水土保持学报 24.3(2010):194-198.
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