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四川省有水田资源面积4592万亩,约占总耕地面积的一半,其中1/3以上为冬水田。由于多数水田无灌排渠系或水源缺乏,故常用蓄囤冬水的形式解决来年种稻用水问题。长期淹灌平作栽培的结果,造成水田土壤潜育化程度与日剧增,加上串灌串排易使水稻土糊塞状结构破坏,因而隐匿侵蚀日益严重,土壤肥力逐年减退,土质变坏,作物产量不断下降。长期以来,水田土壤的隐匿侵蚀很少为人们重视,每次暴雨都造成
Sichuan has a paddy field area of 45.92 million mu, accounting for about half of the total cultivated area, of which more than one-third are winter paddy fields. As most paddy fields have no irrigation and drainage systems or lack of water sources, they are often used to solve the problem of water for rice in the coming year in the form of stored winter water. The results of long-term submerged irrigation and flattened cultivation resulted in the soil gleization and the dramatic increase in the paddy fields. Moreover, the string-plugging of the paddy soil easily led to the destruction of the plug-like structure of the paddy soils. As a result, the concealed erosion became increasingly serious, the soil fertility decreased gradually and the soil quality deteriorated Crop yields are declining. For a long time, the concealed erosion of paddy soils has seldom been taken seriously by people, and each time a heavy rain is caused