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东海县163万亩耕地中有近一半的土壤含钾量低于50ppm。近几年,随着水稻产量水平的提高和有机肥用量的下降,全县78万亩水稻有三分之二面积出现了不同程度因缺钾而引起的生理赤枯现象,限制了水稻产量的进一步提高。为此,我们于1987～1988年进行了水稻施用钾肥系列试验,并将结果用于1989～1990年水稻生产,取得了明显的效益。现将试验结果报告如下。
Nearly half of Donghai County’s 163 million mu of cultivated land has a potassium content of less than 50 ppm. In recent years, with the improvement of rice production level and the decline of organic fertilizer consumption, two thirds of the 78 million mu of rice in the whole county appeared the phenomenon of physiological redness caused by potassium deficiency in varying degrees, limiting the yield of rice Further improve. To this end, we conducted a series of experiments on potash application to rice from 1987 to 1988 and used the results for rice production from 1989 to 1990 with significant benefits. The test results are reported below.