黑土稻作水肥耦合互作的耗水和水分利用效率试验研究

Study on the Water Consumption and Water Use Efficiency at Water and Fertilizer Coupling on Black Soil for Rice

为了分析水肥耦合作用对水稻各生育期耗水量以及水分利用效率的影响规律,于2013年在庆安县和平灌溉站进行水稻田间试验,采用D3-11饱和试验设计。试验结果表明:土壤含水下限75%、磷肥为90.9kg/hm2、钾肥117.5kg/hm2时,各因素可分别取得最大的水分利用效率。土壤含水下限75%、磷肥155.5kg/hm2、钾肥129kg/hm2的水、磷钾肥方案的组合水分利用效率可达到最优。

In order to understand the effects of water and fertilizer on water consumption of every growth stage of rice and disciplinarian of water use efficiency.At peace irrigation station of Qing＇an downtown 2013 with 3factors and 5levels of D3-11 quasiplump.The results showed that wate 75%,phosphorus 90.9kg/hm2,potassium 117.5kg/hm2,complication get the best water consumption of each complication.At the combination of the low limit of water 75%,phosphorus 155.5kg/hm2,potassium 129kg/hm2 get the water consumption.