黄土区旱塬农田生产力提高对土壤水分循环的影响  

Effect of Advanced Productivity in Dryland Farming of the Loess Plateau on Soil Water Cycle

作　　者：黄明斌[1] 党廷辉[2] 李玉山[2] 

机构地区：[1]中科院,水利部水土保持研究所,西北农林科技大学水土保持研究所 [2]中科院,水利部水土保持研究所,西北农林科技大学

出　　处：《农业工程学报》2002年第6期50-54,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金 (50 0 790 2 3);黄土高原土壤侵蚀与旱地农业国家重点实验室基金;CERN长武生态站资助

摘　　要：黄土高原旱塬土层深厚 ,地下水一般不参与土壤水分的垂直交换 ,农田水分循环模式是土壤 -植物 -大气类型。近几十年来 ,由于黄土区旱作农田生产力的不断提高 ,农田土壤水分循环出现新的特点。以农田长期定位试验资料为基础对这一新特点进行了分析 ,结果指出旱作农田生产力提高对土壤水分循环的影响表现在土壤水分利用层加深。Owing to the thick soil layer in dryland farming of the Loess Plateau, groundwater does not directly enter the soil water cycle, and the model of water cycle in dryland farming can only happen in the soil-plant-atmosphere system. With the increase in productivity during recent years, the new features of water cycle have been shown in dryland farming. Based on data from long term experiments in situ, these new features were studied. The results showed that the effect of advanced productivity in dryland farming on soil water cycle were to increase the depth of soil water consumption, reduce the rainfall infiltrating depth and decrease soil water content.

关 键 词：农田生产力 黄土高原 旱作农田 土壤水分循环 

分 类 号：S152.7[农业科学—土壤学]