氮肥运筹方式对豫单2002产量及品质的影响

【研究目的】该研究旨在为豫单2002的推广应用提供施肥技术支撑，为高产高蛋白夏玉米氮肥合理运筹肥提供理论与技术依据。【方法】在豫北潮土区高产田块上，采用田间试验，设N0（不施氮肥）、N1（攻杆肥100%）、N2（攻穗肥100%）、N3（攻杆肥40%+攻穗肥60%），N4（攻杆肥30%+攻穗肥50%+攻粒肥20%）五个处理开展研究。【结果】结果表明：氮肥不同运筹方式增产效果差异显著，其中N3处理增产效果最好，其次是N1处理和N4处理，N2处理增产效果最小；分次施肥有于提高籽粒粗蛋白含量，且随着施肥次数的增加，籽粒粗蛋白含量呈上升趋势；分次施肥亦有利于提高籽粒蛋白质产量，不同处理以N3最佳，其次为N4；氮肥不同运筹方式肥料利用率差异显著，其中N3处理最高，其次为N4和N1处理，而N2最低。【结论】N3处理由于有效地促进了植株对氮素的吸收利用，增加显著地产量和提高了籽粒蛋白质产量，一定程度上提高了籽粒蛋白质含量，因而为最佳氮肥运筹方式。

Effect of nitrogen Fertilizer application management On grain yield and quality of Summer maize variety YuDan 2002

OBJECTIVE]The purpose of this research was to provide basis in theory and in technique for planting Yudan 2002 and high-yield and high-protein content maize cultivars. METHOD]this study was conducted with five treatments of N0(CK), N1( 100% shooting fertilizer ), N2 was the worst ( 100% ear fertilizer), N3(40% shooting fertilizer 60% ear fertilizer ), N4 (30% shooting fertilizer 50% ear fertilizer 20% grain fertilizer)in high-yield field in Chao Soil area of north Henan province. RESULTS]The results showed that the fertilization effect was different within the treatments arranged, among them the effect of N3 was the highest, then that of N1( 100% shooting fertilizer )and N4 (30% shooting fertilizer 50% ear fertilizer 20% grain fertilizer),the effect of N_2 was the lowest ; Nitrogen fertilization more than one time was in favor of the grain protein concentration increase, the more the fertilization time was adopted, the higher the seed protein concentration was got; nitrogen fertilization more than one time was also in favor of the grain protein yield increase, among those treatments, N_3 was better than N_4; nitrogen management treatments had significantly different nitrogen fertilizer utilization rate, among them N_3 got the highest, then the N_4 and N_1, N_2 was the lowest. CONCLUSION]N_3 was the optimized treatment in that it can accumulate most nitrogen in plant, have significant increase effect in seed yield and seed protein yield, and showed increase trend of seed protein concentration.