宁夏引黄灌区钾肥肥效和影响因素研究

Studies on Efficiency of Potash Fertilizer and Influencing Factors in Irrigation Area of Ningxia

本文针对宁夏近１０年来氮磷肥用量、复种指数和单位面积产量大幅度提高、土壤钾素亏损日趋严重、某些作物施钾已表现出明显增产效果的状况，对宁夏引黄灌区钾肥的效果及有效施用条件进行了较为系统的研究，并对目前钾肥的施用提出了看法。

In view of great increases in application quantity of nitrogen and phosphorus fertilizer,cropping index, yield per unit area, more and more serious deficit of potassium in soil and obvious yield-increasing effect of application of potash fertilizer for some crops,we made a fairly systematic research on efficiency of application of potash fertilizer and conditions for its effective application.Our opinion on how to apply potash fertilizer at present is also given in the article.