大同地区土壤钾素状况与作物施钾效应

通过对大同地区七县二区的土壤速效钾和缓效钾化验分析，全市土壤速效钾含量平均为105．3mg／kg，土壤缓效钾含量平均为714．6mg／kg，土壤速效钾含量小于100mg／kg的占50％以上。大同地区土壤施用钾肥对马铃薯、蔬菜等喜钾作物有明显的增产效果，增产率为8％～20％。

The Condition of Soil Potash and The Effect of Application of Potash Fertilizer to Crops

The analysis of soil quick-acting potash and slow-acting potash in Datong's seven counties and two districts shows that the average content of quick-acting potash in soil is 105.3mg/kg,slow-acting potash in soil is 714.6mg/kg.The soil in which the content of quick-acting potash is less than 100mg/kg is over 50%.Through years of experiments and demonstration,it shows that the application of potash fertilizer to crops liking potash such as potatoes,vegetables etc,has clear effect on increasing production and the rate of growth is 8%-20%.In this paper,some rational suggestions on the application of potash fertilizer in Datong area to the major potato yielding field are also advanced.