Abstract:In order to clarify the effect of synergistic phosphorous fertilizer application on spring maize production in black soil area, grain yield, P uptake and use efficiency of maize, agronomic efficiency, partial fertilizer productivity were measured in this study by conducting field experiment for 2 consecutive years containing conventional fertilization and different phosphorous fertilizer synergist treatments. The results showed that compared with conventional phosphate fertilizers, the application of Ⅰ,Ⅱ and Ⅲ synergistic phosphate fertilizers increased the grain yield by an average of 4.1%, 4.8%, and 9.1%; the utilization rate of phosphate fertilizer increased by 1.0, 1.3, and 2.7 percentage points, respectively. The agronomic efficiency increased by 4.8, 5.7, 10.6 kg/kg. In general, synergistic phosphate fertilizers have improved grain yield and fertilizer utilization. Among them, synergistic phosphate fertilizer type Ⅲ has the largest increase in grain yield, phosphate utilization and agronomic efficiency. Hence, the synergistic phosphate fertilizer type III has cheerful prospect in application.