农业工程学报2011，Vol.27Issue(6)：47-51,5.DOI:10.3969/j.issn.1002-6819.2011.06.009
间隔覆盖法对塿土坡面土壤水分调控效果
Soil water regulation effect of interval coverage on Lou soil slope
摘要
Abstract
Using indoor artificial rainfall simulation, spatial soil water distribution, storage and rain water use efficiency were investigated under alternative coverage on Lou soil slope. The results showed that there was no significant difference in wetting front shape of different treatments with different area ratios, but there were big differences in wetting front depths. The shape of wetting front in the upper part of infiltration area embodied characteristics of alternative coverage. The soil water content in surface layer had little difference at different locations along the slope, and soil water content difference decreased as catching area increased. The soil profile water distribution of each treatment decreased gradually from soil surface to deeper layers. Area ratio and rainfall intensity were important factors to influence available rainwater use efficiency. Although available rainwater use efficiency decreased with catching area increasing, its infiltration, acceptable rainfall, storage volume per area increased, which is effective for vegetation growth on infiltration area and resisting drought. But these indices decreased with rainfall intensity. Alternative coverage method showed better effect under lower rainfall intensity. Then, how to determine the appropriate catching area ratio to improve available rainwater use efficiency under different conditions and its effects for different soil slope and rainfall conditions still need further investigation.关键词
土壤水分；含水率；可利用率；间隔覆盖法；面积比；湿润锋；雨水Key words
soil moisture/ water content/ availability/ alternative coverage method/ area ration/ wetting front/ rainwater分类
农业科技引用本文复制引用
郝春红,潘英华,何华,陈曦,崔素芳,王粉萍..间隔覆盖法对塿土坡面土壤水分调控效果[J].农业工程学报,2011,27(6):47-51,5.基金项目
国家自然科学基金项目(40801100、50179035、50609022)；黄土高原土壤侵蚀与旱地农业国家重点实验室基金项目(10501-177；10501-220)及鲁东大学学科建设经费资助. （40801100、50179035、50609022）
