我县随着棉花生产的发展,棉花从土壤中吸收钾量也越来越多,化学氮肥用量不断增加,钾肥施用量少,加之连年连作套种,不种绿肥,施有机肥少,土壤中含钾量得不到补充,致使土壤中严重缺钾,据测定,棉田土壤一般含钾量为50～100 With the development of cotton production in our county, cotton absorbs more and more potassium from the soil, the amount of chemical nitrogen fertilizer is increasing, and the amount of potassium fertilizer is less. In addition, continuous cropping intercropping does not require green manures and organic manure. Potassium was not supplemented, resulting in a serious shortage of potassium in the soil, according to the determination of cotton soil generally potassium 50 ~ 100