Effect of the Rate of Nitrogen Application on Dry Matter Accumulation and Yield Formation of Densely Planted Maize

Planting maize (Zea mays L.) reasonably densely and adding amounts of appropriate nitrogen fertilizer are essential measures to improve the efficiency yield use. In this study, two planting densities 7.5 × 104 plants ha?1 12.0 were established with varieties DengHai 618 (DH618) XianYu 335 (XY335). Simultaneously, 18 levels application established, including a lack (N0) increments 45 kg up 765 (N765) ha?1. The variables studied included effects rate on characteristics dry matter accumulation under drip irrigation, they integrated into water–fertilizer integration. results indicated that yield, harvest index, displayed trend increasing then tending be flat as amount applied increased. use linear plus platform equation fitting change in administered had lowest turning point at N = 279 319, respectively. next parameter was measured index. When highly dense grown before silking, more obviously impacted by matter. index contributed 22.9–27.2% total after silking than 70% production. Increasing is beneficial prolonging time rate. positively correlated rate, correlation between greater. conclusion, applying right can dramatically increase materials, having greatest influence yield. creation influenced its accumulation, serving primary controlling factor.