【摘 要】
：
水稻是我国主要粮食作物之一,特别是南方所占比重最大。由于水源缺乏,排灌条件差,各地冬水田较多,四川占稻田面积的45.8％,重庆占稻田面积的6.5。冬水田由于长期淹水,土壤的物
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水稻是我国主要粮食作物之一,特别是南方所占比重最大。由于水源缺乏,排灌条件差,各地冬水田较多,四川占稻田面积的45.8％,重庆占稻田面积的6.5。冬水田由于长期淹水,土壤的物理、化学和生物性质不良,土
Rice is one of the main food crops in our country, especially the South with the largest share. Due to the lack of water and poor irrigation and drainage conditions, there are more winter paddy fields in various places, with Sichuan accounting for 45.8% of the paddy field and Chongqing accounting for 6.5% of the paddy field. Due to long-term flooding in winter paddy fields, the physical, chemical and biological properties of the soil are poor
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