Abstract:

This paper studied the effects of phosphorus and combinations of phosphorus and zinc fertilizer on growth and development and grain yield of summer maize by split block design. The results showed that phosphate fertilizer application alone or combinations of phosphorus and zinc fertilizer was promoting growth and development of summer maize, increasing dry matter accumulation and secondary root numbers, reducing bare tip, improving ear characters and disease resistance, and the effect of combinations of phosphorus and zinc fertilizer was better than phosphate fertilizer application alone. The yield of phosphate fertilizer application alone and combinations of phosphorus and zinc fertilizer were 7.70%-31.21% and 15.99%-40.34% higher than that of control, respectively. The yield of combinations of phosphorus and zinc fertilizer was 4.03%-8.73% higher than that of phosphate fertilizer application alone. The highest yield was reached 9581.2 kg/hm2 when P2O5 and ZnSO4 application rate were 180 kg/hm2 and 15 kg/hm2. According to the regression analysis, the highest yield will be reached 8823.0 kg/hm2 and 9499.61 kg/hm2 when P2O5 application rate in phosphate fertilizer application alone and combinations of phosphorus and zinc fertilizer are 178.65 kg/hm2 and 203.49 kg/hm2, respectively. The ratio of input to output is high, and the economic benefit is best.