模拟降雨条件下集雨补灌旱作区节水模式研究

Research on Water-saving Mode of Raining and Filling Drought in Simulated Rainfall Conditions

为了提高旱作区的农业产量,提高雨水利用率,需要研究并开发有效的旱作区节水模式。研究对模拟降雨条件下集雨补灌旱作区节水模式进行了研究。研究首先设计了模拟降雨装置,并根据干旱区域的降雨量特点和时空分布特点确定试验过程中的降雨量,确定参与试验的节水模式,包括完成平作、平作全膜、平作半膜、垄作全膜和垄作半膜等操作的设计,在模拟降雨条件下对上述种植模式展开土壤水分、集雨效应和水分动态变化分析。研究表明,垄作全膜种植模式具有良好的节水性能,值得应用。

In order to improve the agricultural yield and the utilization of rainwater in dryland areas,it is necessary to study and develop effective water-saving models in dryland areas.In this study,the water-saving model of rain-collected supplementary irrigation in dryland under simulated rainfall conditions was studied.This study first designed a simulated rainfall device,and determined the rainfall in the test process according to the rainfall characteristics and spatial-temporal distribution characteristics of the arid area.It determined the water-saving mode participating in the test,including the design of completing the operations of flat cropping,flat cropping full film,flat cropping half film,ridge cropping full film and ridge cropping half film.The analysis of soil moisture,rainfall collection effect and water dynamic change of the above planting modes under the simulated rainfall condition are carried.The research shows that the ridge planting mode with full film has good water-saving performance and is worthy of application.