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在辽西褐色土上,对豆科牧草紫苜蓿和沙打旺施用磷肥,可显著地促进生育、增加产量、提高效益。有效磷含量高的过磷酸钙,施用当年的肥效比磷矿粉高;迟效性的磷矿粉施后第二年的后效作用显著;两者的当年肥效和第二年的后效均随施用量的增加而加大。磷肥施后第三年仍有一定的后效。施用量以过磷酸钙每亩20公斤、埃及磷矿粉每亩30公斤较为合适。
On the brown soil in western Liaoning, the application of phosphate fertilizer to the legume forage, Medicago sativa and Astragalus adsurgens, can significantly promote fertility, increase yield and increase benefits. The effective phosphorus content of superphosphate, fertilizer application of the year than the high phosphate rock; late effect of phosphate rock powder after the second year after the significant effect; both the current year and the second year after the fertilizer effect With the increase in the amount of increase. Phosphate fertilizer after the third year there is still some after-effects. Application of superphosphate 20 kg per acre, Egyptian phosphate rock 30 kg per acre more appropriate.