磷肥在皖南酸性土壤上对粮食作物有显著增产效果外,在我省淮北、淮南及沿江等地中性土壤上对粮食作物增产效果很不稳定,致使我省丰富的磷肥資源在农业生产上应用受到了极大限制。一般認为豆科綠肥和豆科作物利用磷酸能力較强,它們不仅能充分利用土壤中有效的磷素,而且能把土壤中难溶性的磷酸盐有效化。近几年来,各地研究指出,磷肥能显著提高豆科綠肥的产量,并认为当前豆科綠肥施用磷肥是提高磷肥肥效的有效措施。磷肥在我省不同土壤类型上对豆科綠肥的肥效,以往研究很少。为了查明磷肥在合肥地区白土和黄泥土上对光叶紫花苕子(以 Phosphorus fertilizer on the acidic soil in southern Anhui significantly increased the yield of grain crops, in the province of Huaibei, Huainan and other places of neutral soil on the yield-increase effect of food crops is very unstable, resulting in abundant phosphorus fertilizer resources in agriculture in the application of agricultural production Has been greatly limited. It is generally believed that leguminous green manure and legumes have a strong ability to utilize phosphoric acid. They not only make full use of the available phosphorus in the soil, but also can ameliorate the sparingly soluble phosphates in the soil. In recent years, various studies have pointed out that phosphate fertilizer can significantly increase the yield of legume green manure, and that the current application of legume green manure phosphate fertilizer is an effective measure to improve fertilizer efficiency. Phosphate fertilizer in different soil types in our province of legume green manure, little research in the past. In order to identify the phosphate fertilizer in Hefei area clay and yellow soil on the light leaves Vetch (in