田间油菜的适宜磷用量研究

Total Control of Phosphorus Fertilizer in Rape

[目的]为了确定南京六合区油菜适宜的磷施用量与配比。[方法]在代表性土壤上对六合区油菜主要品种施用不同用量磷肥,同时分析油菜产量和含磷量。[结果]施磷肥90.0~112.5 kg/hm^2,配合施用适量的氮钾肥,产量最高,效益最佳。如果再增加磷肥施用量,那么磷肥利用率急剧下降,造成浪费,污染环境。[结论]该研究为高产、经济、环保施肥提供科学依据。

[Objective] The research aimed to determine the suitable phosphorus application amount and the proportion of rape in Liuhe,Nanjing. [Method] Different amounts of phosphorus fertilizer were applied on the main rape variety planted in the representative Liuhe soil. The yield and the phosphorus content of rape were measured. [Result] The rape yield was the highest and the benefit was the best when 90. 0-112. 5 kg / hm^2 phosphours fertilizer was applied with moderate nitrogen and potash fertilizer. If we add the application amount of phosphorus fertilizer,the utilization rate of phosphate fertilizer would decrease sharply,causing waste and environment pollution. [Conclusion] The study provides a scientific basis for high yield,economy and environmental protection.