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通过滴灌带下铺设阻水塑料布 ,明显地改变了地下滴灌湿润体的形状和湿润体内部的土壤水分分布。与普通地下滴灌比较 ,增大了沿毛管纵向的湿润宽度 ,提高了湿润锋向上的运移高度 ,减小了水分向下的入渗深度 ,同时 ,增大了滴灌带上层土壤的含水量。
Through the drip tape laid under the water blocking plastic cloth, obviously changing the shape of underground drip irrigation wetting body and the distribution of soil moisture inside. Compared with ordinary underground drip irrigation, the wetting width along the longitudinal direction of the capillary tube is increased, the migration height of the wetting front is increased, the infiltration depth of the water is reduced, and the water content of the upper soil of the drip irrigation belt is also increased.