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1.土壤含水量。土壤溶液中K+的浓度是钾有效性的重要指标。土壤有效钾的数量常随土壤含水量的增加而有所提高,而且K+在土壤中向作物根系的移动状况也受土壤含水量的影响。土壤含水量增加,移动速率加快。因此,施用钾肥后及时适量地灌溉,可为作物提供更多的钾营养。2.土壤粘粒含量。土壤粘粒含量决定土壤溶液中钾浓度的重要因素。粘粒含量高的土壤,施钾肥后一般有相当一部分要被粘粒吸附(或固定),因此为了
Soil moisture content K + concentration in soil solution is an important indicator of potassium availability. The amount of available K in soil tends to increase with the increase of soil moisture, and the movement of K + in the soil toward the crop roots is also affected by soil moisture content. Soil water content increases, moving faster. Therefore, the timely and proper irrigation after the application of potassium fertilizer can provide more potassium nutrition for crops. Soil clay content. Soil clay content determines the concentration of potassium in soil solution. Soil with high clay content generally has a large percentage of clay adsorbed (or immobilized) after application of potassium fertilizer,