论文部分内容阅读
一、作物对钾的反应影响作物对钾肥反应的主要因素是土壤有效钾和土壤水分。其他生长因素和某些特定种类的作物也要考虑在内。交换性钾不能很好地表示钾的有效性,土壤溶液中平衡的钾离子浓度和钾离子缓冲力,才是估价土壤有效钾较可靠的参数。在砂质土壤上,少量施钾能明显提高土壤溶液中钾离子浓度,因而增产显著。但是质地粘重的土壤,施钾几乎
First, the response of crops to potassium The main factors that affect crop response to potash are soil available potassium and soil moisture. Other growth factors and certain types of crops are also taken into account. Exchangeable potassium can not be a good indicator of the effectiveness of potassium, potassium concentration in soil solution balance and potassium ion buffer force, is the valuation of soil available potassium more reliable parameters. In sandy soil, a small amount of potassium application can significantly increase the concentration of potassium ions in soil solution, thus yield significantly. However, the texture of heavy soil, potassium almost