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油菜施用钾肥的增产作用早已肯定.但随着生产的发展,氮、磷肥施用量的增加,尤其是近几年来甘兰型油菜良种的普及和油菜产量的大幅度提高,对钾肥的需要也相应增加了,致使一些原来不显示缺钾的地区也出现了油菜缺钾症状,成为提高油菜产量的重要障碍因素之一.为了明确不同土壤条件下油菜施用钾肥的效果,我们于1981-1982年在三个地点进行了钾肥试验.现将结果总结于下,供参考.
However, with the development of production, the application of nitrogen and phosphorus fertilizers increased, especially the popularization of the good varieties of Brassica napus and the substantial increase of rapeseed production in recent years, and the corresponding needs of potash fertilizer Increased, resulting in some areas that did not show the original potassium also appeared rape potassium symptoms, rape has become an important obstacle to increase yield.In order to clarify the effect of different levels of soil application of potash fertilizer, we in 1981-1982 in Three sites were tested for potash fertilizer, the results are summarized below, for reference.