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在云南干旱区设置原状土沟(T1)、坡地夯实(T2)、夯实后盖石棉瓦(T3)和夯实后盖塑料薄膜(T4)4种集雨导流模式,以坡地玉米为试材,研究不同导流模式对降雨的集水效率、水分利用率和玉米产量的影响。结果表明,4种导流模式的集水效率、水分利用率和玉米产量的大小顺序均表现为T4>T3>T2>T1。总体来看,四种导流模式的集水效率在41.7%~58.7%之间;相比于T1,T2、T3、T4的水分利用率分别提高了34.9%、53.5%和92.5%,产量分别提高了1 767、1 981.5和2 385 kg/hm2。
In the arid region of Yunnan Province, four rainfall-harvesting diversion patterns of undisturbed soil ditch (T1), compacted slope (T2), tamped rear cover asbestos (T3) and tamped rear plastic film (T4) The effects of different diversion modes on water harvesting efficiency, water use efficiency and corn yield were studied. The results showed that the water diversion efficiencies, water use efficiencies, and corn yields of the four diversion models all showed the order of T4> T3> T2> T1. Overall, the water diversion efficiencies of the four diversion modes ranged from 41.7% to 58.7%. Compared with T1, T2, T3 and T4, the water use efficiency increased by 34.9%, 53.5% and 92.5%, respectively Increased by 1 767,1 981.5 and 2 385 kg / hm2.