| 不同品种及不同成熟期的青贮玉米秸秆营养成分及体外发酵评定 |
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| 引用本文： | 辛杭书,赵遵阳,任丽萍,孟庆翔.不同品种及不同成熟期的青贮玉米秸秆营养成分及体外发酵评定[J].中国畜牧杂志,2007,43(23):29-33. |
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| 作者姓名： | 辛杭书 赵遵阳 任丽萍 孟庆翔 |
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| 作者单位： | 动物营养学国家重点实验室,中国农业大学动物科技学院,肉牛研究中心,北京,100094 |
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| 摘 要： | 通过化学成分分析和活体外人工瘤胃发酵法,对3种玉米(高油玉米HOC115、普通玉米3138及青贮专用玉米)及3个籽粒成熟期(2/4乳线期(ML)、3/4 ML和4/4 ML)的秸秆青贮品质进行了比较。结果表明:随籽粒成熟期的延长,HOC115和3138青贮秸秆的品质及青贮发酵品质均下降,而青贮专用玉米各期的发酵品质均良好。其中HOC115的NDF和木质素含量以3/4 ML为最高(P<0.05),ADF含量无显著变化(P>0.05),3138的NDF、ADF和木质素含量在成熟期上呈明显的二次曲线增加趋势(P<0.01),干物质(DM)和NDF消化率明显降低(P<0.05),而青贮专用玉米秸秆的NDF、ADF和木质素含量在成熟期上呈显著的下降趋势(P<0.01),48 h的DM消化率有明显的增加(P<0.05)。由此得出HOC115和3138玉米秸秆在2/4 ML具有较佳的青贮效果,而青贮专用玉米的最佳青贮期可延长至籽粒3/4 ML或4/4 ML。
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| 关 键 词： | 玉米秸秆 品种 成熟期 青贮 营养价值 |
| 文章编号： | 0258-7033（2007）23-0029-05 |
| 收稿时间： | 2006-12-13 |
| 修稿时间： | 2007-06-24 |
Evaluation of Nutritional Value and Fermentation in vitro of Corn Stalks Silage in Different Varieties and Maturity Stage of Kernels |
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| XIN Hang-shu,ZHAO Zun-yang,REN Li-ping,MENG Qing-xiang.Evaluation of Nutritional Value and Fermentation in vitro of Corn Stalks Silage in Different Varieties and Maturity Stage of Kernels[J].Chinese Journal of Animal Science,2007,43(23):29-33. |
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| Authors: | XIN Hang-shu ZHAO Zun-yang REN Li-ping MENG Qing-xiang |
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| Abstract: | This study was conducted to evaluate the nutritional value and fermentation in vitro of three kind of silage including high oil corn variety 115(HOC115),typical corn variety 3138 and a special silage corn variety by comparing their chemical components and gas production,taking different maturity stage of kernels(2/4,3/4 and 4/4 milk line;ML) into account.The results showed that for the variety of HOC115 and 3138,their silage fermentation quality were decreased as the mature period increasing,while the special silage corn variety had better quality in all the periods.A significant difference was observed in the contents of NDF and lignin of HOC115 at different mature stages(P < 0.05) and the highest contents were in the 3/4 ML,whereas the content of ADF had little change(P > 0.05).The contents of NDF,ADF and lignin of typical corn variety 3138 were quadratically increased as maturity increasing(P < 0.01),as well as the digestibility of DM and NDF.In contrast to HOC115 and 3138,the special silage corn variety had high DM digestibility(P < 0.05),less contents of NDF,ADF and lignin(P < 0.01) with advanced maturity stage of corn kernels.It was concluded that 2/4 ML was the best silage period for HOC115 and 3138,and 3/4 or 4/4 ML for the special silage corn as well. |
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| Keywords: | corn stalks variety maturity stage silage nutritional value |
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