氮肥与磷肥配合滴施对土壤氮素水平分布的影响

Nitrogen distribution in soil under different nitrogenous and phosphorus fertigation from a point source

通过室内模拟滴灌施肥,研究不同氮肥及磷肥混合施用对土壤氮素水平分布的影响。结果表明:土壤含水量在水平方向上呈线性减缓分布,不同种类氮肥单施与配施对土壤含水量影响不大;氮磷肥配施较氮肥单施可加速土壤硝态氮随着水分的迁移速度;土壤铵态氮在滴头处浓度最大,在水平方向上的最大迁移距离为7.5cm。

The mixed application of different nitrogen and phosphorus fertilizers on soil nitrogen horizontal distribution was studied by indoor simulated drip fertigation.The results showed that the soil water content decreased linearly and distributed horizontally.The soil water content was not affected by different nitrogen fertilizers.The moving of soil NO3^--N was accelerated with the mixed application of nitrogen and phosphorus fertilizer.Soil NH4^＋-N content was the highest at the drip head,and the maximum moving distance was 7.5 cm horizontally.