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冷浸田的特点是长期浸水,地下水位高,耕层浅瘦,土壤结构不良,水、肥、气、热不协调,影响作物正常生长发育,这种地在南方分布很广,严重阻碍农业生产的发展。经过改良后,产量可大幅度提高,湖南省邵东县,大搞农田基本建设,改造了冷浸田,产量年年上升,1973年粮食亩产超千斤。现将各地经验介绍如下: (一)修建农田排灌系统,改善土壤水分状况这是改良冷浸田最基本的措施。土壤水分状况改善以后,养分、空气、温度的状况也必
Cold soaked fields are characterized by long-term flooding, high groundwater table, slender tillage, poor soil structure, uncoordinated water, fertilizer, gas and heat, affecting the normal crop growth and development. The land is widely distributed in the south and seriously hinders agriculture Production development. After the improvement, the output can be greatly increased. Shaodong County in Hunan Province has vigorously expanded farmland infrastructures, transformed the cold-dip fields, and increased its output year by year. In 1973, the per-mu yield of grain surpassed that of the previous one. The experiences of all regions are introduced as follows: (1) Construction of farmland irrigation and drainage system to improve soil moisture status This is the most basic measure to improve the cold-immersed fields. After the improvement of soil moisture, nutrients, air, temperature conditions will also be