Effect of Fertilizing Level and Planting Densities on Yield and Nitrogen Utilization in Maize  

施肥水平与种植密度对玉米产量和氮素利用的效应（英文）

作　　者：谭华[1] 邹成林[1] 郑德波[1] 黄爱花[1] 莫润秀[1] 韦新兴[1] 吴永升[1] 蒋维萍[1] 韦慧[1] 黄开健[1] 

机构地区：[1]广西农业科学院玉米研究所,广西南宁530227

出　　处：《Agricultural Science & Technology》2015年第3期504-509,共6页农业科学与技术（英文版）

基　　金：现代农业产业技术体系广西创新团队建设专项(nycytxgxcxtd-07-B);国家支撑计划子课题"广西玉米抗旱关键技术集成与示范"(2012BAD40B04-2)~~

摘　　要：Elite maize hybrid Guidan0810 was selected as material, and the effects of fertilizing level and planting densities on yield and nitrogen utilization were dis- cussed in the study. In field experiments as per double-cropping system, 4 main plots （fertilization levels） and 6 subplots （planting densities） were set in a split plot design. The results suggested that yield had close relationship with fertilization levels and planting densities. Different fertilization levels and planting densities significantly affected yield. With the increase of nitrogen fertilization, nitrogen use efficiency, nitrogen agronomic efficiency and nitrogen physiological efficiency declined. Under the same fertilization level, nitrogen use efficiency, nitrogen agronomic efficiency and nitrogen physiological efficiency grew a little with the increase of planting density, so nitrogen efficiency could be improved by regulating planting density. The results also showed that A2 （including N 225.0 kg/hm2, P205 75.0 kg/hm^2, K20 187.5 kg/hm^2） matching to B3 （52 500 plants/hm^2） or B4（60 000 plants/hm^2） was a better design, which could obtain a higher yield in the range of 7 913.2-8 207.8 kg/hm2, respectively.为探讨不同施肥水平与种植密度对玉米产量及氮素利用的作用效应,以玉米杂交种‘桂单0810’为材料,裂区设计,设置4个施肥水平和6个种植密度,进行一年两季田间试验。结果表明：不同施肥水平与不同种植密度对玉米产量都有显著的作用效应;随着施肥水平提高,氮素利用率、氮素农学效率、氮素生理效率均有所降低,同一施肥水平随密度增加,氮素利用率、氮素农学效率、氮素生理效率均有所提高,通过调节种植密度可以较好发挥氮素的作用效率;以（A2）施纯N 225.0 kg/hm2、P2O575.0 kg/hm2、K2O 187.5 kg/hm2与种植密度在（B3）52 500株/hm2至（B4）60 000株/hm2玉米产量可达7 913.2~8 207.8 kg/hm2是一种较优的密、肥配合选择。

关 键 词：Maize hybrid Fertilizing level Planting density Effects 

分 类 号：S513[农业科学—作物学]