施氮量对春玉米花粒期干物质积累与氮素运转特性的影响  

Dry Matter Accumulation and Nitrogen Migration of Spring Maize for Nitrogen Application in the Flowering and Milking Stages

作　　者：刘瑀[1] 李佐同[1] 杨克军[1] 徐晶宇[1] 王玉凤[1] 赵长江[1] 方永江[1] 刘承[1] 张发明[1] 

机构地区：[1]黑龙江八一农垦大学农学院,黑龙江大庆163319

出　　处：《作物杂志》2015年第4期142-145,共4页Crops

基　　金："十二五"农村领域国家科技计划课题(2011BAD16B1103);国家科技支撑计划课题(2013BAD07B01-07;2013BAD07B-01-05);黑龙江省科技厅科技攻关项目(GA12B101-03)

摘　　要：采用田间试验,以当地经验施氮量(N5)为基准,研究了不同低氮水平(经验施氮量的100%、80%、60%、40%、20%、0%)对玉米品种郑单958营养器官干物质和氮素积累、转移及其对子粒贡献率的影响。结果表明,降低施氮量后,郑单958的产量呈先上升后下降的趋势,其最高产量出现在N4(经验施氮量的80%),产量为10 308.58kg/hm2,较不施氮增产31.90%,较当地经验施肥量增产5.81%。并且N4的氮肥农学效率、氮素收获指数、氮素利用效率、氮肥偏生产力均大于N5。吐丝后干物质合成量和吐丝后氮素合成量对子粒的贡献率都占较大比重。Dry matter accumulation and nitrogen use efficiency of spring maize under different reduction levels of local farmers traditional nitrogen usage（100% ,80% ,60% ,40% ,20% ,0% traditional nitrogen） were studied in this experiment. The experimental variety was Zhengdan 958. The results showed that yield of Zhengdan 958 was increased and then decreased and the highest yield appeared in N4 （80% traditional nitrogen） with a yield of 10 308.58kg/hm^2. Compared with traditional fertilizer application and no fertilizer application, N4 application improved grain yield by 5. 81% and 31.90%, respectively. Compared with traditional fertilizer application, N4 application increased agronomic efficiency of applied N, nitrogen harvest index, recovery efficiency of applied N and N partial factor productivity. After spinning synthesis of grain dry matter and nitrogen contribution rate accounted for the larger proportion of all.

关 键 词：春玉米 氮肥 干物质 产量 

分 类 号：S513[农业科学—作物学]