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施用硅钙肥不仅能提高水稻植株透光性能,促使叶片增厚,改善水稻体内硅氮营养,促进水稻增产;而且能减轻土壤铁、铝、锰等离子的毒害,增加磷的有效性。为了进一步探讨在含磷丰富的稻田施用硅钙肥对活化土壤磷素的效果,为合理施用硅钙肥提供依据,我们于1979年早晚稻进行了此项试验,现将结果初报如下。 一、试验方法 试验地为近代冲积物发育的黄泥田,历年双季稻——绿肥轮作制,基本农化性状为PH值6.45,有机质2.166％,全氮0.1119％,全磷0.1164％,有效磷总量46.21m/100g土,有机磷21.54mg/100g土,无机磷24.67mg/100g土,有效硅23.5mg/100g土,代换性钾125PPM。
The application of calcium silicate fertilizer can not only improve the light transmissibility of rice plants, promote thickening of leaves, improve nitrogen and nitrogen nutrition in rice and increase rice yield, but also reduce the toxicity of soil iron, aluminum and manganese ions and increase the availability of phosphorus. In order to further explore the effect of applying calcium silicate fertilizers on activated soil phosphorus in phosphorus-rich paddy so as to provide a basis for rational application of calcium silicate fertilizers, we conducted this experiment in early and late rice in 1979. The results are as follows. First, the test method for the development of modern alluvial yellow paddy field, calendar year double cropping rice - green fertilizer round rotation system, the basic agrochemical properties of PH 6.45, 2.166% organic matter, total nitrogen 0.1119%, 0.1164% of total phosphorus, available phosphorus The total amount of 46.21m / 100g soil, organic phosphorus 21.54mg / 100g soil, inorganic phosphorus 24.67mg / 100g soil, available silicon 23.5mg / 100g soil, substitutional potassium 125PPM.