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条田是平原低洼易涝地区治涝、治碱、脱盐,改善农业生产条件,建立高产稳产农田的重要措施。据铁岭、辽中、海城、大洼和营口等县调查,条田可使农作物的单产提高65～134％。条田的作用是:1.利于排除地表积水,降低地下水位:条田面中间稍高,两边略低,地表水很容易流进条田沟而排除。据测定,在壤土和粘壤土地块,当条田沟深1.0米,沟距30～50米时,地下水位每昼夜可降低5～7厘米。同样的条田工程,可使砂壤土地区的地下水位每昼夜下降7～10厘米。在田间水多的情况下,及时排除地表水,迅速降低地下水
Article field is a low-lying plain flood plain flood control, alkali treatment, desalination, improve agricultural production conditions, the establishment of high and stable production of farmland important measures. According to surveys in Tieling, Liaozhong, Haicheng, Dawa and Yingkou counties, the yield of crops can be increased by 65-134%. Field of the role is: 1. To help eliminate surface water, reduce the water table: the middle of the field slightly higher, slightly lower on both sides, the surface water is easy to flow into the ditch and exclusion. It is determined that in loamy and clay loam plots, the depth of the groundwater table can be reduced by 5 to 7 centimeters per day and night when the stope furrow is 1.0 meter deep and the trench spacing is 30-50 meters. The same field works can make the sandy loam area of groundwater levels dropped by 7 to 10 cm day and night. In the field of juicy circumstances, the timely exclusion of surface water, rapid reduction of groundwater