本世纪初开始研究利用微生物溶解磷矿粉,五十年代分离出溶磷微生物菌种,制成菌肥,并进行了肥效试验;近20多年的研究对微生物溶磷特性都有肯定,但因菌剂施于土壤后,其作用受菌、作物、土壤等条件的影响,田间效果不大稳定,尚待进一步研究。几年来我们利用黑曲霉和磷矿粉,通过人工培制,提高有效磷含量,尔后施于田间。这样不受生态条件影响,易收到与磷肥相似的效果,是充分利用中、低品位磷矿资源的一个途径。仅将研究结果 The beginning of this century began to study the use of microorganisms to dissolve phosphate rock, dissolved phosphorus bacteria in the 1950s, made of fertilizer, and fertilizer test; After the fungicide is applied to the soil, its effect is affected by the conditions of bacteria, crops and soil, and the effect in the field is not stable enough yet to be further studied. Over the past few years we use Aspergillus niger and phosphate rock, through artificial cultivation, improve the available phosphorus content, and then applied to the field. This is not affected by ecological conditions, easy to receive similar effects with phosphate fertilizer is to make full use of low-grade phosphate rock resources as a way. Only the study results