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据1979年冬的土壤普查看,我县稻田土壤缺钾少磷是一个最突出的问题,这个问题巳成为夺取农业高产稳产的主要障碍,现就这个问题,浅谈其产生原因和改良办法。一、稻田土壤缺钾少磷我县普查稻田面积294938亩中,速效钾(K_2O)低于50ppm 的面积有243596亩,占稻田面积82.59%;速效磷(P_2O_5)低于10ppm 的面积有192784亩,占稻田面积65.36%。从1964和1979年两次土壤普查的情况看,稻田土壤中的速效磷、钾含量趋向是越来越低
According to the soil survey in the winter of 1979, the shortage of potassium and potassium in paddy soils in our county is one of the most prominent problems. This problem has become a major obstacle to the high and stable agricultural output. On this issue, we discuss the causes and the ways for improvement. First, the lack of potassium potassium paddy soil survey County area of 294938 mu of census, available potassium (K_2O) less than 50ppm area of 243596 acres, accounting for 82.59% of the area of paddy fields; available phosphorus (P2O5) area of less than 10ppm 192784 acres , Accounting for 65.36% of paddy field area. From the two soil censuses conducted in 1964 and 1979, the contents of available P and K in paddy soil tend to be lower and lower