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据各地的试验,磷肥利用率一般为10—20％,有些地方还低于10％。原因是水溶性磷肥的主要成分磷酸一钙施入土壤后即转化成另一些新的磷酸盐形态,其中大部分磷素作物不能吸收利用。因此,了解本省主要土类磷素状况,以及水溶性磷肥施入不同土类的形态转化,为改进磷肥施用方法和提高磷肥利用率提供依据。针对这个问题,于1981—1982年开展室内模拟试验及磷素形态化学分析,所得研究结果叙述于
According to tests all over the country, the utilization rate of phosphate fertilizer is generally 10-20% and in some places less than 10%. The reason is that the main component of water-soluble phosphate fertilizer, monocalcium phosphate applied to the soil into other new phosphate forms, most of which phosphorus crops can not be absorbed. Therefore, it is important to understand the status of main soil phosphorus in the province and the morphological transformation of water-soluble phosphate fertilizer applied to different soil so as to provide basis for improving the application methods of phosphorus fertilizer and increasing the utilization rate of phosphate fertilizer. In response to this problem, laboratory simulation experiments and phosphorus morphological analysis were carried out in 1981-1982. The results obtained are described in