寒地稻作不同节水灌溉模式降雨利用率潜力分析

Analysis on Rainfall Use Potential of Different Irrigation Modes for Rice Paddy Field in Cold Area

为研究不同灌溉模式降雨利用潜力,以寒地稻作为研究对象,系统分析了灌溉站30年的试验资料,结合同时期降雨数据,分别对有无蓄雨要求的几种灌溉模式进行了理论分析。结果表明,无蓄雨要求时,控制灌溉降雨利用率最低,间歇灌溉较低,常规灌溉较高,而湿润灌溉最高;在相同的蓄雨条件下,控制灌溉降雨利用率最高,湿润灌溉居次,间灌第三,常规灌溉最低。由此可见,控制灌溉的降雨利用潜力最大,其他灌溉模式低于控灌;不同的灌排及蓄雨标准能够对降雨利用率产生较大影响。

To study rainfall use potential of different irrigation modes for rice paddy field in cold area,it analyzed systematically experimental materials,with rainfall data,and researched on irrigation modes with rain storage requirements and without rain storage requirements.The results showed,without rain storage requirements,the rainfall use ratio of control irrigation is the lowest and of wetting irrigation is the highest and that with the same rain storage requirements,the rainfall use ratio of control irrigation is the highest,of wetting irrigation second,flooding irrigation lowest.The conclusions can be got：the rain use potential of control irrigation is the highest ; different irrigation and drainage and rain storage requirements have important influence on rain use ratio.