饲用玉米新品种中玉15号产量影响因子的研究

Study on Influencing Factors on Yield of A New Forage Maize Variety Zhongyu 15

[目的]为了充分发挥饲用玉米新品种中玉15号的增产潜力。[方法]在张家口地区进行试验,从播期、密度、氮肥用量3种因素入手,研究了它们对中玉15号产量及其构成因素的影响。[结果]3种因素对产量影响的大小顺序为密度>氮肥水平>播期。随着播期的延迟,中玉15号生育期缩短,产量显著下降,有效穗数、穗粒数、千粒重降低。中玉15号最适密度为54000株/hm2,最佳施氮量是90～180kg/hm2。[结论]一定范围内增加密度和施肥量可以提高产量。该研究为饲用玉米大面积种植和规模化生产提供了科学依据。

[Objective]The study aimed to play a full role of yield -increasing potential of a new forage maize variety Zhongyu 15. [Method] In the experiment in Zhangjiakou region, the effects of three factors of sowing time, density and amount of N fertilization on the yield of Zhongyu 15 and its components were studied. [Result]The effects of three factors on the yield of maize were density〉nitrogen level〉sowing time. With the delay of sowing time, the growing period of Zhongyu 15 was shorten, the yield decreased significantly and effective ears, grains per ear and 1 000-grain weight reduced. The suitable density of Zhongyu 15 was 3 600 strains per 667 m^2 and the optimum amount of N fertilization was 6-12 kg per 667 m^2, [Conclusion] The increment of density and fertilization amount within a certain scope could increase the yield. The research provided a scientific basis for large-scale planting and production of forage maize.