淹灌（又称格田灌溉），是用田埂将灌溉土地划分成许多格田，灌水时，使格田内保持一定深度的水层，借重力作用湿润土壤，主要适用于水稻。
麦冬植苗前，淹灌土壤，犁耙后作成水稻秧田状，经澄实再进行植苗。
Before replanting Ophiopogon Japonicus, flood the soil, plough it and make it like paddy.
格田淹灌的田间准备是在每一个灌溉田块周围形成15—50厘米高的窄田埂。
Land preparation for basin irrigation is accomplished by forming a narrow ridge between 15 and 50 cm high on all sides of each area to be flooded.
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