摘要
利用9a试验资料，分析和研究了坡地水平沟耕作的土壤水分动态及耗水规律，并从水土流失、养分流失及水分利用方面研究了水平沟耕作效益。得出坡地水平沟耕作的土壤水分变化为：封冻前的强烈失墒期、越冬干湿交替失墒期和返青拔节后缓慢失墒期3个阶段。小麦灌浆期及返青期对产量作用最大；水平为能够显著地拦蓄径流，减少土镶冲刷和养分流失，提高土壤水分利用率，进而提高作物单产。
On the basis of 9-year experimental data, the dynamic change of soil water andconsuming water were studied in slope land. The benefit of level trench tillage as affected by soiland water loss, soil nutrient loss, soil water utilization, was also discussed detailedly. Soilwater change laws were divided into 3 stages such as strong consuming stage before soil icebounding,consuming water stage with alternation of drying and wetting in surviving winter period,and slowly consuming water after grouting and turning green. Because of retaining runoff,lessening soil wash, reducing soil nutrient loss, and raising soil water use rate, the level trenchtillage increased crop yield obviously.
出处
《水土保持研究》
CSCD
1998年第4期52-58,76,共8页
Research of Soil and Water Conservation
基金
黄委会水保基金!95-04
