一、钾在植物营养中的作用 植物所需的钾主要来自土壤。随着单产和复种指数提高,目前我国南方部分地区已经出现土壤缺钾现象。而水稻栽培的先进技术措施,钾肥施用量已达到和氮肥相等。据此可以预言,今后我国农业生产中对钾肥的需要,更将日趋迫切。 钾和氮、磷虽然同是植物大量 First, the role of potassium in plant nutrition The potassium required by plants mainly from the soil. With the improvement of yield and multiple cropping index, the potassium deficiency in soil has appeared in some parts of South China. The rice cultivation of advanced technical measures, the amount of potash fertilizer and nitrogen fertilizer has reached the same. Based on this, we can predict that the demand for potash fertilizer in agricultural production in our country will become more and more urgent. Potassium and nitrogen, although the same phosphorus plant is large