不同种植密度和施氮量对几个玉米新品种生长发育及产量的影响

目的]研究不同种植密度和施氮量对几个玉米(Zea mays L.)新品种生长发育及产量的影响,以找到其最佳种植密度和施氮量。方法]通过3因素随机区组排列试验,建立了玉米新品种云瑞6号、云瑞8号、云瑞88号和楚单11号与种植密度、施肥量的数学模型。结果]云瑞6号的最佳氮肥施用量为900 kg/hm2,采用普通施肥方法;最佳种植密度为6.75万株/hm2。云瑞8号的最佳氮肥施用量为600 kg/hm2,采用普通施肥方法;最佳种植密度为6.75万株/hm2。云瑞88号的最佳氮肥施用量为900 kg/hm2,采用时空施肥方法;最佳种植密度为5.25万株/hm2。楚单11号的最佳氮肥施用量为600 kg/hm2,采用时空施肥方法;最佳种植密度为5.25万株/hm2。结论]该研究可为云瑞6号、云瑞8号、云瑞88和楚单11号在云南省楚雄地区的推广提供科学依据。

Effects of Different Planting Density and Nitrogen Fertilizer Application Rate on Growth and Development and Yield of Several New Maize(Zea mays L.) Varieties

Objective] The aim was to study the effects of different planting density and nitrogen fertilizer application rate on growth and development and yield of several new maize varieties,and then find out their best planting density and nitrogen fertilizer application rate.Method] By randomized block arrangement test of three factors,the mathematical models of 4 new maize varieties(Yunduan6hao,Yunduan8hao,Yuanduan88hao and Chudan11hao) with planting density and nitrogen fertilizer application rate were established.Result] The best nitrogen fertilizer application rate of Yunduan6hao was 900 kg/hm2,and the normal fertilization method was used;Its best planting density was 6.75×104 plants/hm2.The best nitrogen fertilizer application rate of Yunduan8hao was 600 kg/hm2,and the normal fertilization method was used;Its best planting density was 6.75×104 plants/hm2.The best nitrogen fertilizer application rate of Yunduan88hao was 900 kg/hm2,and the space-time fertilization method was used;Its best planting density was 5.25×104 plants/hm2.The best nitrogen fertilizer application rate of Chudan11hao was 600 kg/hm2,and the space-time fertilization method was used;Its best planting density was 5.25×104 plants/hm2.Conclusion] The study provides a scientific basis for extension of Yunduan6hao,Yunduan8hao,Yuanduan88hao and Chudan11hao in Chuxiong Area,Yunnan Province.