施肥与种植密度对玉米品种南校969农艺性状及产量的影响

目的]研究玉米新品种南校969不同种植密度和施肥量对其主要农艺性状和产量的影响,为南校969玉米的高产高效栽培提供提供科学依据.方法]试验采用二因素裂区设计,设主处理肥料因子为A共4个水平,即A1（纯N321.20 kg/ha、P2O5 107.10 kg/ha、K2O 267.90 kg/ha）、A2（纯N 225.00 kg/ha、P2O5 75.00 kg/ha、K2O 187.50 kg/ha）、A3（纯N 160.65 kg/ha、P2O5 53.55 kg/ha、K2O 133.95 kg/ha）、A4不施肥.设副处理密度因子为B共4个水平,B1：45000株/ha、B2：52500株/ha、B3：60000株/ha、B4：67500株/ha,随机排列,3次重复.测定叶面积指数等玉米主要农艺性状,收获后测定产量.结果]不同种植密度和施肥量对南校969的产量有显著影响.在A1 ～A4施肥水平范围内,随着施肥量的减少不同种植密度处理的玉米行粒数、千粒重、出籽率逐渐下降,以A2施肥水平的产量最高,为6239.40 kg/ha.种植密度对穗长、穗粗、行粒数、千粒重及产量均有显著影响,穗长、穗粗、穗粒数、千粒重整体上均随着种植密度的增加而降低,产量却随着密度的增加而逐渐增加,当密度为67500株/ha时产量最高,达6484.50 kg/ha.结论]南校969玉米在种植密度为67500株/ha,施纯N 321.30 kg/ha,P2O5 107.10 kg/ha,K2O 267.90 kg/ha时产量最高.

Effects of fertilization and planting density on agronomic traits and yield of maize variety Nanxiao 969

Objective]Effects of different planting densities and fertilizer amounts on the major agronomic traits and yield of new corn variety Nanxiao 969 were studied to provide scientific and theoretical references for its high yield and efficiency cultivation.Method]The experiments were carried out by two factors split-plot design,setting the main fertilizer factors for a total of 4 levels,which were A1 （N：321.20 kg/ha,P2O5：107.10 kg/ha,K2O：267.90 kg/ha）,A2（N：225.00 kg/ha,P2O5：75.00 kg/ha,K2O：187.50 kg/ha）,A3（N：160.65 kg/ha,P2O5：53.55 kg/ha,K2O：133.95 kg/ha） and A4 （No fertilizer）.Four levels on plant densities also set as auxiliary treatments,i.e.B1 （45000 plants/ha）,B2（52500 plants/ha）,B3 （60000 plants/ha） and B4 （67500 plants/ha）,which were arrayed randomly and repeated 3 times.The leaf area index,yield and other agronomic traits of maize were determined.Result]The plant density and fertilizing amount had significant effects on the yield of Nanxiao 969.In the A1-A4 fertilizer levels,grains perrow,l000-grain weight and grain ratio gradually declined with the fertilizer application in each density.The yield could reach the highest at 6239.40 kg/ha in level A2.The ear length,ear diameter,perrow,1000-grain weight,and yield were also significantly impacted by the density.With the rising of planting density,the ear length,ear diameter,perrow and 1000-grain weight decreased,while the yield increased,which could reach the highest at 6484.50 kg/ha when the density was 67500 plants/ha.Conclusion] The yield for Nanxiao 969 could reach the highest at the density of 67500 plants/ha,pure N of 321.30 kg/ha,P2O5 of 107.10 kg/ha,and K2O of 267.90 kg/ha.