随着复种指数的提高,作物从土壤中带走的钾素越来越多,使土壤中原来矿物里的钾素越来越少。加之前一些年农村对钾肥的施用补充又少,因而造成土壤中普遍缺乏钾素,有些土壤钾素成了限制因素,影响作物产量的稳步提高。要补充土壤中的钾素,除施用化学钾肥外,开辟农家钾肥资源是一条重要的途 With the improvement of multiple cropping index, more and more potassium is taken away from the soil by crop so that potassium in the original mineral in the soil is less and less. In addition, some years ago, the application of potassium fertilizer in the rural areas was less supplemented. As a result, there was a general lack of potassium in the soil and some soil potassium became the limiting factor, which affected the steady increase of crop yield. To supplement the soil of potassium, in addition to the use of chemical potash, the development of potash fertilizer resources is an important way