一、前言硅酸盐钾矿物直接应用于农业以增加土壤中的可利用钾,在国外有过不少实驗,有些国家也正在这样做。譬如,挪威利用黑云母、白榴石;苏联利用霞石、海绿石,都取得一定成效。但用另一些 I. INTRODUCTION Silicate potassium minerals are used directly in agriculture to increase available potassium in soils. There have been many experiments abroad and some countries are also doing so. For example, Norway made use of biotite and leucite; and the Soviet Union made use of nepheline and glauconite to achieve certain results. But use something else