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近些年,由于土壤中施入氮、磷肥量不断增加,加之高产品种和高产栽培技术的推广应用,粮食产量不断提高,对土壤中有效钾的消耗量越来越大,土壤耕层有效钾日趋下降,致使土壤中氮、磷、钾比例失去了平衡,土壤表现出不同程度的缺钾。实践证明,玉米施用钾肥的增产幅度为7.6～14.9％,大豆施用钾肥的增产幅度为8.4～16.7％。取得了较好的增产增收效果。 一、钾肥应用技术 多年来,我们广辟钾肥肥源,在玉米,大豆上进行了施用硫酸钾、生物钾、小灰、炭化稻壳等试验示范,确定了适合土壤和作物的钾肥用量及施用方法。
In recent years, due to the application of nitrogen and phosphorus in the soil, and the popularization and application of high-yielding varieties and high-yielding cultivation techniques, the grain yield is continuously increased and the available potassium in the soil is increasing. The available potassium Declining, resulting in soil nitrogen, phosphorus and potassium ratio lost balance, the soil showed varying degrees of potassium deficiency. Practice has proved that corn yield increased by 7.6 to 14.9% of potash, soybean yield increased by 8.4 to 16.7%. Achieved a better yield increase effect. First, the application of potash technology Over the years, we broaden the potash fertilizer sources, corn, soybeans were applied potassium sulfate, biological potassium, small ash, carbonized rice hulls and other pilot demonstration to determine the amount of soil and crops suitable for potash and application method.