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为了提高寒区青粗饲料质量和奶牛生产性能,试验于2011—2012年在黑龙江省畜牧研究所试验基地选用20个青贮玉米品种,连续2年研究青贮玉米的9个农艺性状与产量的关系,找出对产量影响较大的农艺性状因子;对青贮玉米植株形态性状指标进行主成分分析,结合产量相关性分析,确定主导产量的因子。结果表明:与产量相关的性状为第1主成分,籽粒形成相关的性状为第2主成分,叶片形态因子为第3主成分。在齐齐哈尔地区产量性状表现较好的品种有中原单32、东青1号、东农252、海玉9号。
In order to improve the quality of crude fodder and dairy cow performance in cold area, 20 silage maize varieties were selected in the experimental base of Heilongjiang Provincial Institute of Animal Husbandry from 2011 to 2012. The relationship between 9 agronomic traits and yield of silage maize was studied for two consecutive years. The agronomic trait factors that had a great effect on the yield were analyzed. The principal component analysis of the morphological traits of the silage corn plants was conducted, and the yield-related factors were determined to determine the dominant yield factors. The results showed that the traits related to yield were the first principal component, the trait related to grain formation was the second principal component and the leaf morphological factor was the third principal component. Among the varieties with good yield traits in Qiqihar, there are Zhongyuan single 32, Dongqing 1, Dongnong 252 and Haiyu 9.