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砂姜黑土是黄淮海平原主要低产土壤之一,面积约有4700万亩,在我省淮北地区面积约有(?)000万亩以上.由于土壤磷素严重缺乏,加上氮素不足,土壤有机质含量低,成为限制农业生产的主要因素,是综合治理研究中需要解决的主要问题.研究砂姜黑土的磷素含量、供磷能力、磷素的形态组成,磷肥在土壤中的转化积累以及磷肥的后效问题,是合理施用磷肥、提高磷肥利用率的理论依据.本文是1979—1984年定位试验的有关结果的总结,供生产上参考.
Shajiang black soil is one of the main low-yielding soils in the Huang-Huai-Hai Plain, with an area of 47 million mu and an area of about 10,000 mu in Huaibei area of our province. Due to the serious lack of soil phosphorus and the shortage of nitrogen, The low organic matter content is the main factor to limit the agricultural production and is the main problem to be solved in the comprehensive management research.Studies on the content of phosphorus, supplying phosphorus, the form and composition of phosphorus, the conversion and accumulation of phosphate fertilizer in the soil, The problem of after-effect of phosphate fertilizer is the theoretical basis for the rational application of phosphate fertilizer to improve the utilization rate of phosphate fertilizer.This paper summarizes the relevant results of the positioning test from 1979 to 1984 for reference in production.