玉米苜蓿间作的蓄水保土效益试验研究

为了在种植作物的同时减少水土流失,采用玉米苜蓿间作的种植模式,研究其蓄水保土效益。试验对玉米苜蓿间作与单作玉米的土壤含水量,径流量以及产沙量进行观测,进而研究两者的蓄水保土效益。结果表明:玉米苜蓿间作地的土壤含水量大于玉米单作地的土壤含水量;玉米苜蓿间作的径流量和产沙量均小于玉米单作,说明了玉米苜蓿能够有效地减少径流的冲刷侵蚀,具有良好的拦沙性能;经计算得出玉米苜蓿间作的蓄水效益为87%,保土效益为98%,表明玉米苜蓿间作的蓄水保土效益显著。

Study on Benefits of Intercropping of Maize and Alfalfa on Soil and Water Conservation

In order to grow crops while reducing soil erosion,cropping patterns,maize intercropped with alfalfa,was used to study soil and water conservation benefits.Soil moisture,runoff and sediment yield of intercropping patterns for maize and alfalfa and monoculture maize were observed and both soil and water conservation benefits were studied.The results showed that soil moisture of intercropping patterns for maize and alfalfa was more than monoculture maize in soil moisture;runoff and sediment yield of intercropping patterns for maize and alfalfa were less than that of maize monoculture,which indicated that intercropping patterns for maize and alfalfa could effectively reduce runoff erosion and had a good performance of sediment reduction;The water storage efficiency of intercropping patterns for maize and alfalfa was 87%,soil conservation efficiency was 98%,which indicated that soil and water conservation benefits of intercropping patterns for maize and alfalfa were significant.