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氯化钾是速效性钾肥,也是一种生理酸性钾肥,作为当前农村的主要钾肥,要提高其用肥经济效益,应做好以下五点: 一、要施在缺钾土壤中。上壤中有效钾含量越低,施用钾肥增产效果越显著。据各地经验,有效钾含量低于80ppm(折亩含氧化钾12公斤)的缺钾土壤,特别是低于50ppm的极缺钾土壤,供钾能力低,施用钾肥增产效果最显著。冷浸田、烂泥田等,虽然有机质含量较多,但因地下水位高、水温低、微生物活动能力差,有机质有效钾含量很少,故施钾肥增产效果较好。
Potassium chloride is a quick-acting potash fertilizer, which is also a physiological acidity potash fertilizer. As the main potash fertilizer in rural areas, it is necessary to make the following five points to improve the economic benefits of using fertilizer: First, it should be applied in potassium-deficient soil. The lower the available potassium content in soil, the more obvious the effect of applying potassium fertilizer is. According to local experience, potassium deficiency is less than 80ppm potassium (potassium per acre containing 12 kg) of potassium-deficient soil, especially potassium deficiency is less than 50ppm of potassium soils, potassium is low, the most significant increase in yield by applying potassium. Cold paddy field, muddy fields, etc., although more organic matter content, but because of high groundwater levels, low water temperature, poor microbial activity, organic matter available potassium content is small, so the yield of potassium is better.