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钾是作物生长发育所必需的营养元素之一。随着复种指数和单位面积产量的不断提高,仅靠土壤中原有钾素和农家肥补充钾,已不能满足作物的需要。土壤缺钾会成为产量上升的主要障碍因素,钾肥在农业生产中的增产作用,日益被愈来愈多的生产和科学实验所证实,所以因地制宜,科学合理地施用钾肥,是作物增产的有效途径。 (一)土壤是决定施钾肥的基础条件我国土壤中钾的含量范围变化较大,全氧化钾量在0.2—
Potassium is one of the nutrients necessary for crop growth and development. With the multiple cropping index and the continuous improvement of yield per unit area, it is no longer sufficient to meet the needs of crops by relying on the original potassium and manure in the soil to supplement potassium. Potassium deficiency in soils will become the main obstacle to the increase of production. The increasing production of potash fertilizer in agricultural production is increasingly confirmed by more and more production and scientific experiments. Therefore, applying potassium fertilizer scientifically and reasonably is an effective way for increasing crop yield . (A) the soil is the basic conditions for the decision to apply K fertilizer China’s soil potassium content range greater changes in the total amount of potassium oxide 0.2-