摘要
在分析国外风蚀模型资料的基础上,建立了适用于保护性耕作的风蚀模型。该模型以小时为步长,根据气象数据、地表土壤水分、秸秆残茬覆盖率及地表粗糙度,模拟不同耕作体系下农田土壤风蚀流失量情况;针对保护性耕作的特点,考虑到残茬覆盖对土壤含水量和地表粗糙度的影响;通过田间风蚀测定数据的验证,证明所建立的保护性耕作风蚀模型的模拟值与实测值比较吻合。
Based on the analysis of models abroad, a model of soil erosion was set up to assess the impacts of conservation tillage practices in dry land areas of Northern China. Supplied with local soil and crop parameters and climate data, the model could simulate soil loss on hour basis to evaluate different conservation tillage system. According to the characteristics of conservation tillage, the effect of residual cover on soil water content and roughness was considered. The preliminary results of calibration and validation showed that the model could be used to simulate soil loss caused by wind erosion with high accuracy.
出处
《干旱地区农业研究》
CSCD
北大核心
2006年第2期1-7,共7页
Agricultural Research in the Arid Areas
基金
科技部农业科技成果转化资金项目(02EFN216900734)
关键词
保护性耕作
土壤风蚀
模型
conservation tillage
soil erosion
model
