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在废黄河尾闾入海处扇形地带,由于土壤缺磷,限制农业生产发展。据滨海县土壤普查统计资料,全县耕地土壤有效性的磷素平均3.6ppm,其中>5PPm 的三级以上的土地只占该县97万亩耕地22.8%,70%以上耕地都在5ppm 以下,所以大麦增施磷肥(过磷酸钙)的效果十分显著,本地人有无磷不种麦的说法。但一九八○年之后,磷肥用量迅速上升,把磷肥当着万能,而且亩用量由20——30斤增至100多斤,有的多达200余斤,盲目加大用量,非但浪费,而且造成一定不良后果,为寻求大麦磷肥合理施用量,达到经济施肥目的,我们在高产的水田地区,拟定大麦磷肥最佳用量试验。
In the waste Yellow River tail fan into the sea, due to lack of phosphorus in the soil, limiting the development of agricultural production. According to statistics of Binhai County Soil Census, the average soil phosphorus availability of arable land in the county is 3.6ppm, of which, land with Grade III above> 5PPm accounts for only 22.8% of 970000 mu of arable land in the county, and less than 5% Therefore, the application of barley increased phosphate (superphosphate) effect is very significant, local people without phosphorus is not the kind of wheat. However, after 1808, the amount of phosphate fertilizer increased rapidly and the phosphate fertilizer was in the middle of everything. Moreover, the amount of mu increased from 20 to 30 kg to over 100 kg and some up to over 200 kg. It was not only wasteful, But also cause some adverse consequences. In order to seek the rational application rate of barley phosphate fertilizer and achieve the purpose of economic fertilization, we developed the optimum dosage test of barley phosphate fertilizer in paddy field with high yield.