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钾是作物的重要营养元素之一。随着作物产量的提高,复种指数和氮磷化肥施用量的增加,钾肥的需要日趋重要。但是,由于施用条件不同,钾肥的肥效差异很大。为了更好地施用钾肥,本文根据1965年以来的试验资料,对其有效的施用条件进行以下的探讨。一、钾肥的肥效1965年以来,我们在氮磷肥的基础上
Potassium is one of the important nutrients in crops. With the increase of crop yield, cropping index and the increase of nitrogen and phosphorus fertilizer application, the demand of potash fertilizer is becoming more and more important. However, due to different application conditions, the fertilizer efficiency varies widely. In order to better use potassium fertilizer, this article according to the test data since 1965, its effective application conditions for the following discussion. First, the fertilizer effect of potash 1965, we are based on nitrogen and phosphorus