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我场从1952年建场到1956年一直采用大水漫灌,在土壤结构差(多为砂土和粉砂壤土),地面坡度大(1.6～2.0%)的情况下,水土及肥力流失相当严重,在灌溉两次以后,即形成表土板结,水不下渗,不能满足作物生长后期的需水要求,致使各种作物的产量逐年下降。从1954年我们曾试行垂直等高线的沟灌方法,但由于土地未进行规划和平整,田间进水量不能控制,灌水沟内的流量过大,形成
My field from 1952 to 1956 has been flooded flood irrigation in the soil structure is poor (mostly sandy and silty loam), the ground slope (1.6 ~ 2.0%), the loss of water and soil and fertility is quite serious After irrigation twice, the formation of topsoil knot, water infiltration, can not meet the late crop water requirements, resulting in a decline in the production of various crops year by year. Since 1954, we piloted the furrow irrigation method of vertical contours. However, due to the lack of land planning and leveling, the inflow of water in the field can not be controlled and the flow in the irrigation ditch is too large to form