我国石灰性土壤分布很广,据估計,約占全国耕地面积的半数左右。石灰性土壤上如何合理施用磷肥,是值得研究的問題。 近几年来各地試驗証明,在石灰性土壤上施用磷肥,有的肥效很显著,也有的肥效不显著。磷肥肥效的大小受到土壤过去利用 The distribution of calcareous soil in our country is very wide, it is estimated that it accounts for about half of the country’s arable land. How to rationally use phosphate fertilizer in calcareous soil is a problem worth studying. Experiments in recent years have proved that the application of phosphate fertilizer in calcareous soils, and some fertilizer effect is significant, and some fertilizer effect is not significant. The effectiveness of phosphate fertilizer by the soil past the size of use