氮磷耦合效应对新建果岭草坪磷淋溶的影响

Coupling Effects of Nitrogen and Phosphate on Phosphorus Leaching Loss from Simulated Golf Green

在北京地区采用二次饱和D-最优设计,研究了氮磷耦合效应对新建果岭草坪磷淋溶的影响。结果表明:影响淋溶水中总磷浓度的关键因子是施磷量,其次是氮肥施用量。淋溶水中总磷浓度随着施磷量增加而增大,不同施肥条件下淋溶水中总磷浓度均在8月份达到最大值。从保护地表水的角度看,在北京的气候条件下,如果果岭草坪上月施磷量(P2O5)控制在2.4 g/m2以内,就不会发生磷淋溶污染地表水水环境。

Coupling effects of nitrogen and phosphate on phosphorus loss from simulated goff green were studied in Beijing with quadric saturation D-optimum regression design. The results show that total phosphorus in the leachate was also related to phosphate （P2O5） application rates. Total phosphorus concentrations in the leachate reached maximum in August despite phosphate （P2O5） applied at various rates. With monthly phosphate （P2O5） application rate on golf course under 2.4 g/m^2 ,the total phosphorus concentrations in the leachate would not exceed 0.4 mg/L,so it will not contaminate water on golf course.