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采用均匀设计方法,研究了在云南不同生态条件下氮肥施用方式和种植密度对3个玉米新品种(云瑞8号、云瑞6号、云瑞88号)产量的影响。结果表明,不同生态条件下,玉米的产量水平和经济性状不同。高密度不影响品种特有的株高、穗位高和穗位系数,茎粗、叶宽随密度增加而显著减小。3个品种的穗长、行粒数和千粒重随着密度的增大显著减少,产量随着密度的增大而显著增高。高密度对穗部性状造成了不利影响,而高密度的增产效应补偿了密度对穗部性状的不利影响。控制施肥时间和施肥空间f时空1的施肥方式,施用较少的氮肥即可有效的增加产量。云瑞88号具有广泛的适应性和较高的耐密植性,为3个品种中最具潜力的高产品种,应大力推广种植。
The uniform design method was used to study the effects of nitrogen application and planting density on the yield of three new maize varieties (Yunrui 8, Yunrui 6 and Yunrui 88) under different ecological conditions in Yunnan. The results showed that under different ecological conditions, the yield and economic traits of maize were different. High density did not affect the specific plant height, ear height and ear coefficient, stem diameter, leaf width with the density increased significantly reduced. The spike length, grain number and 1000-grain weight of three cultivars decreased significantly with the increase of density, and the yield increased significantly with the increase of density. High density has an adverse effect on ear traits, whereas high density yield effects compensate for the detrimental effects of density on ear traits. Control fertilization time and fertilization space f space-time 1 fertilization mode, the application of less nitrogen fertilizer can effectively increase the yield. Yunrui 88 has a wide range of adaptability and high tolerance to close planting, the three varieties of the most promising high-yielding varieties, should vigorously promote the planting.