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shuang ceng guan gai pai shui xi tong
Pages: 48
Year: Issue:  4
Journal: Water Saving Irrigation

Keyword:  灌溉排水集水坑水库水质土壤灌溉农田土壤《科技日报》作物产量灌溉用阀门控制泥沙沉积;
Abstract: 双层灌溉排水系统近年美国发明“双层灌溉排水系统”,在作物地表下埋置两层深度不同的瓦管管道,一层埋在地表下0.5~0.6m深处作灌溉用,另一层埋在地表下0.9~1.2m深处作排水用。两层管系各有自己阀门控制水流,打开排水闸,水从农田土壤中排人集水坑,从...
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