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四、隔沟灌溉相间1—2条灌水沟灌水的灌溉方法叫做隔沟灌溉。这种方法的目的是力求灌溉水能充分有效地被作物吸收,减少土壤自身的无效蒸发。美国布什兰德农业研究室1979年进行了高粱逐沟灌溉和隔沟灌溉的对比试验,结果说明,虽然隔沟灌溉单位面积产量较低,但由于其节水效果显著,在水量有限的情况下,扩大了灌溉面积,提高了效益。五、自动化灌溉
Fourth, ditch irrigated with 1-2 irrigation ditch Irrigation irrigation method called ditch irrigation. The purpose of this method is to ensure that irrigated water can be absorbed by the crop sufficiently and efficiently and reduce the ineffective evaporation of the soil itself. The Bushland Agricultural Research Laboratory in the United States carried out a comparative experiment on furrow irrigation and gully irrigation in sorghum in 1979. The results showed that although the yield per unit area of furrow irrigation was lower, due to its remarkable water-saving effect, under the limited water flow , Expand irrigation area, improve efficiency. Fifth, automatic irrigation