砖窑沟流域旱地农田土壤水分平衡研究初报

本研究于降水充沛的1988年，在两种土地类型、两种土壤肥力和两种作物条件下，探讨了砖窑沟流域旱地农田土壤水分动态与作物生长的关系，土壤水分收支及利用状况。研究结果表明，土壤水分季节性变化可划分为稳定期、增加期和消耗期。作物收获时0—2m土层贮水量较播前增加了28.9—66.9mm，土壤水分利用率为0.77—1.40。文中提出了培肥地力，调整作物种植结构与布局是提高旱地农田土壤水分利用率的有效途径。

Preliminary Study on Soil Water Balance of Dryland at Zhuanyaogou Basin

This experiment was carried out in conditions designed by three factors and two levels which were two lond types, two soil fertilies and two crops in 1988 in which there was rich rainfall.The experiment was to study the relationship between soil water dynamic and crop growth, income and expense balance, utilization of soil water of dryland at Zhuanyaogou basin.Results showed that soil water seasonal dynamic of farmland can be divided into three different stages which were stable stage, increasing stage and loss stage.Soil water storage in layers of 0-200cm atcrop harvest was 29.8-66.9mm more than that before sowing time.The water use efficiency was 0.77-1.40.It can also be concluded that it is effective way of improving water use efficiency of farmland to increase soil fertility and adjusting crop structure and distribution.