Abstract:

The objective of this trial was to optimize fertilization technology for silage maize.The trial used silage maize variety Zhongbei 410 and the split-split plot design to study the effects of different fertilizer combination in big flare period on fresh grass yield. The results showed that: (1) The silage maize fresh yield of different fertilizer combination model was established by quadratic polynomial stepwise regression, the model could accurately simulate the relationship between the application of nitrogen, phosphate, potassium and the yield of silage maize. The effects of nitrogen, phosphate, potassium and the interaction of nitrogen and phosphate on fresh grass yield were significant. (2) The fresh grass yield was increased as increasing the nitrogen and potassium application, and increased first and reduced later with the increasing the phosphate application. In the experiment, the fresh grass yield was reached maximum values (75.63 t/hm2) with N 138 kg/hm2, P2O5 31.71 kg/hm2, and K2O54 kg/hm2 in big flare period.