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长期以来钾肥没有引起人们的重视,但是每年收获物从土壤中带走大量养分,有些地块不施农肥或施得很少又不施钾素化肥,钾素得不到补偿。土壤中的缓效钾释放的慢,远远不能满足玉米的需要。而玉米对钾的反应敏感,在同一缺钾地块上,往往是玉米最先出现缺钾症状。施用硫酸钾、氯化钾等增产明显。但其货源缺,成本高。因此应注意有机肥的施用,提倡秸秆还田。千方百计将草木灰回收,这是宝贵的钾肥资源。
For a long time, potash fertilizer has not attracted people’s attention, but each year the harvest takes away a lot of nutrients from the soil. In some plots, no fertilizers or little or no K fertilizers are applied, and K is not compensated. The slow release of slow-release potassium in soil is far from meeting the needs of corn. The reaction of corn sensitive to potassium, potassium in the same land, often the first symptoms of potassium deficiency. Application of potassium sulfate, potassium chloride yield significantly. But its lack of supply, high cost. Therefore, we should pay attention to the application of organic fertilizer to promote the return of straw. Do everything possible to plant ash recovery, which is a valuable potash resources.