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采用定位方法研究连年施用钾肥对草甸土土壤钾素动态变化及产量的影响。红兴隆草甸土钾素含量较高 ,施钾对大豆和小麦有一定的增产效果 ,但增产幅度不大。施钾肥结合秸秆还田对增加作物产量 ,提高钾肥利用率有积极作用。施钾肥和秸秆还田明显缓解土壤耕层速效钾和缓效钾含量的下降 ,对维持土壤钾素平衡具有重要意义
Positioning method was used to study the effects of successive years of application of potassium on soil potassium dynamics and yield in meadow soil. Hongxing meadow soil higher potassium content, potassium application of soybean and wheat have a certain yield-increasing effect, but the rate of increase is not large. Potash fertilizer combined with straw to increase crop yield, improve potassium utilization has a positive effect. Applying K fertilizer and returning straw to soil obviously relieved the decline of available potassium and slow-acting potassium in soil, which is of great significance to maintain the balance of soil potassium