一、氮磷配合施用的效果磷肥与氮肥配合施用是提高作物单位面积产量,提高施肥效果的重要措施。施用磷肥无论是单施还是配合施用氮肥,都是土壤肥力愈低,其增产幅度也愈大。对于禾谷类作物氮磷配合使用,无论在低的或是高肥力水平土壤上,皆比单施磷肥或单施氮肥提高了单位面积产量。试验证 First, the effect of nitrogen and phosphorus with the application of phosphate fertilizer and nitrogen fertilizer application is to improve crop yield per unit area, improve fertilizer effect of the important measures. Application of phosphate fertilizer, either alone or with the application of nitrogen fertilizer, are the lower soil fertility, the greater the rate of increase. For the application of nitrogen and phosphorus of cereal crops, the yield per unit area was increased more than that of single phosphate fertilizer or single nitrogen fertilizer on the soil with low or high fertility level. Test certificate