活化磷矿粉在砖红壤上的施用效果

砖红壤酸性强和活性铁、铝含量高，对磷固定强烈，磷肥有效性低．为了提高磷肥利用率，将高分子有机化合物与磷矿粉混合加工制成活化磷矿粉，分别施用于种植甘蔗的新垦砖红壤和种植大白菜的严重侵蚀砖红壤以及种植花生的水旱轮作熟化砖红壤，结果表明：施用活化磷矿粉的肥效至少与过磷酸钙相当，甚至优于过磷酸钙．因此，为了节省生产成本和改良土壤，活化磷矿粉值得在砖红壤区推广应用。

Effect of Application of Active Ground Phosphate Rock to Latosol

Because the latosol is violently acid and rich in the active Fe and Al, phosphorus is fixed in soil violently , so that the efficiency of phosphatic fertilizer is very low.In order to strengthen the utilization of phosphatic fertilizer , the active ground phosphate rock was exploited from processing the high-molecular organic compound and ground phosphate rock in our study.It is applied respectively in newly cultivated latosol planting the sugar cane and in mellom latosol by crop rotation of water and drought planting peanut and in newly cultivated latosol by serious erosion planting vegetable.The results show that fertilizer efficiency applying active ground phosphate rock is at least similar to calcium superphosphate, even is superior to the calcium superphosphate.Therefore, to save the production cost and improve the soil, the active ground phoshate rock deserves to be applied to latosol field.