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钾是农作物主要营养元素。随着农作物产量的提高,复种指数和化学氮磷肥施用量的增加,土壤钾素供应不足的问题日渐突出。近几年陆续报道了土壤缺钾和钾肥肥效研究报告,长江流域以南大豆产区和辽宁省报道了大豆钾肥增产效果,我所1973—1974年湖北省组织的多点试验,初步研究了几种土壤上的大豆钾肥肥效。为了探讨钾素供应状况及对大豆生长发育的影响、钾肥施用条件以及植株钾素营养诊断,于1977—1978年在湖北省孝感县新铺公社联盟大队进行了田间试验,在所内设置了盆栽试验。本文就两年试验部分内容予以总结。
Potassium is a major nutrient in crops. With the increase of crop yield, the increase of multiple cropping index and the application of chemical nitrogen and phosphorus fertilizer, the problem of insufficient supply of soil potassium has become increasingly prominent. In recent years, one after another reported on the soil potassium and potassium fertilizer efficiency research report, the south of the Yangtze River Basin and Liaoning Province, Liaoning Province soybean yield reported by the effect of increased potassium production in our province from 1973 to 1974, multi-point test organization, a preliminary study of a few Soil fertility of soybean potash on soil. In order to explore the status of potassium supply and the impact on the growth and development of soybean, the application conditions of potassium fertilizer and the diagnosis of plant potassium nutrition, a field experiment was carried out in 1977-1978 in the coalition brigade of Xinpu Commune in Xiaogan County, Hubei Province. . This article summarizes the contents of two years of experiments.