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应用化学分析、吸附试验和生物诊断方法 ,系统研究了风沙土钾的丰缺状况及钾的有效性和利用率 .结果表明 :钾素含量受质地影响较大 ,缓效钾和速效钾则随质地变粘而增加 ,风沙土中的钾主要以矿物态钾形态存在 .被土壤固定的钾量也随着施钾量的增加上升 ,无论是速效钾含量或固定钾量均与施钾量呈显著水平正相关 .土壤钾素释放过程表明 ,土壤钾素的释放量不仅随土壤物理性粘粒的增加而增加 ,其释放容量和强度也逐渐增加。钾素对于植株鲜重、根长、根数、百粒重、结果枝率等均有明显的影响 ,且可使酿酒葡萄含糖量、酒精和出汁率增加 ,而使总酸度降低
Application of chemical analysis, adsorption test and bio-diagnostic methods to systematically study the abundance and deficiency of potassium in wind-blown soil and the availability and utilization rate of potassium.The results show that the content of potassium is affected greatly by texture, while the slow- The soil becomes thicker and more viscous, and the potassium in aeolian sandy soil mainly exists in the form of mineral potassium.The amount of potassium fixed in soil also increases with the increase of potassium applied, both of the available potassium and the fixed potassium and the applied potassium Significant positive correlation.The soil potassium release process showed that the release of soil potassium not only increased with the increase of soil physical clay, but also increased its release capacity and intensity. Potassium has a significant effect on plant fresh weight, root length, root number, 100-grain weight, the result of branch rate and so on, and can increase the sugar content of alcohol, alcohol and juice, and reduce the total acidity