On the higher and lower available P soils,treatments of P fertilizer application were designed in the field condition.Effects of P fertilizer application on the plant biomass,yield,nutrient uptake of N,P and K in nine maize cultivars,and their differences were studied.This provided the scientific basis for P fertilizer reasonable application.The results showed that on the higher available P soil,P fertilizer application hardly influenced the maize biomass,yield and its constitute,and nutrient uptake of N,P ...