四川省改造中低产田的定位监测  

Improvement of middle_low yield paddy by fixed fields mearsure in Sichuan province

作　　者：周孝强[1] 

机构地区：[1]四川省农业厅土肥处,四川成都610041

出　　处：《西南农业学报》2001年第1期61-64,共4页Southwest China Journal of Agricultural Sciences

摘　　要：以改造中低产田土和改善农业基本条件为重点 ,不断提高农业综合生产能力是我国农业综合开发的主要内容 ,也是农业生态环境建设的重心所在。通过在四川省 6 2个改造中低产田效益定位监测点连续 9年的测定 ,对改造前和改造后的土壤理化性质、土壤肥力变化和增产效益作了研究。结果表明 ,下湿田经改造后 ,土壤构型有明显变化 ,耕层土壤温度和氧化还原电位升高、土壤生产能力明显提高 ,公顷增产达 1995kg ;冬水田经改造后 ,土壤结构 2～ 3年可呈块状或棱柱状 ,土壤含水量趋于合理 ,土壤温度和氧化还原电位均明显上升 ,亚铁离子等有毒物质明显下降 ,且有利于种植模式的优化 ,公顷增产粮食 3315kg。The progressive raise of comprehensive agricultural productive forces by means of improvement of middle_low yielding upland and paddy and agricultural foundation conditions are the major content of comprehensive agricultural development in China and the key point of agricultural ecological environment construction.The studies of physical and chemical properties, fertility and yield raise of improved soil were carried out compared with the original soil by means of 67 fixed fields mearsure in 9 years in the whole province. The results showed the profile structure was improved significantly, the temperature of cultivated soil layer and potential of oxidation and reduction of soil increased, the productive forces of soil were significantly raised, and the yield per ha increased by 1 995 kg after the improvement of muddy field. The soil structure became cube or prism in 2-3 years;the soil water content tended to reasonable;the temperature and potentials of oxidation and reduction of soil increased significantly; the contents of ferrous and other poisonous matter decreased significantly, the cropping pattern could be maximum; the yield per ha increased by 3 315kg after the improvement of winter submerged field. -

关 键 词：中低产田改造 下湿田 冬水田 定位观测 土壤肥力 土壤性状 粮食产量 

分 类 号：S156.93[农业科学—土壤学]