| 不同添加剂对陇东紫花苜蓿青贮品质的影响 |
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| 引用本文： | 薛春胜,刘瑞生,徐建峰,张金林.不同添加剂对陇东紫花苜蓿青贮品质的影响[J].草业科学,2018,35(2):456-462. |
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| 作者姓名： | 薛春胜 刘瑞生 徐建峰 张金林 |
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| 作者单位： | 平凉职业技术学院,甘肃平凉,744000;甘肃省畜牧兽医研究所,甘肃平凉,744000;兰州大学草地农业科技学院,甘肃兰州,730000 |
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| 摘 要： | 生物添加剂在促进牧草青贮发酵过程中有益菌和酶的活性、提高消化率和改善发酵品质等方面发挥着重要作用。本研究以初花期刈割的第1茬陇东紫花苜蓿(Medicago sativa)为原料,分析不同添加剂(甲酸、蔗糖、EM菌液和纤维素酶)对青贮发酵品质的影响。结果表明,4种添加剂处理组苜蓿青贮饲料感官评定得分均高于无添加剂对照组,pH、乙酸和氨态氮(NH3-N)/总氮(TN)含量均显著(P<0.05)低于对照组,乳酸含量均显著(P<0.05)高于对照组,且未检测到丁酸和丙酸。4种添加剂处理组的粗蛋白质含量均显著(P<0.05)高于对照组,酸性洗涤纤维含量均显著(P<0.05)低于对照组。蔗糖组、EM菌液组和纤维素酶组的中性洗涤纤维含量均显著(P<0.05)低于甲酸组和对照组。粗灰分含量各组间无显著差异(P>0.05)。4种添加剂处理组的有氧稳定性均显著(P<0.05)高于对照组。上述结果说明,4种添加剂都可以提高陇东紫花苜蓿青贮的发酵品质、营养价值,延长有氧稳定性。但以纤维素酶组pH、乙酸和NH3-N/TN含量最低,乳酸含量最高,青贮发酵品质最佳,建议在生产实践中大量推广应用。
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| 关 键 词： | 紫花苜蓿 添加剂 青贮品质 甲酸 蔗糖 EM 纤维素酶 |
| 收稿时间： | 2017-06-05 |
Effect of different additives on the silage quality of Longdong alfalfa |
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| Xue Chun-sheng,Liu Rui-sheng,Xu Jian-feng,Zhang Jin-lin.Effect of different additives on the silage quality of Longdong alfalfa[J].Pratacultural Science,2018,35(2):456-462. |
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| Authors: | Xue Chun-sheng Liu Rui-sheng Xu Jian-feng Zhang Jin-lin |
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| Institution: | 1.Pingliang Vocational and Technical College, Pingliang 744000, Gansu, China;2.Gansu Institute of Animal Science and Veterinary Medicine, Pingliang 744000, Gansu, China;3.College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, China |
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| Abstract: | Biological additives play important roles in improving the activity of bacteria and enzymes during fermentation,thereby improving the digestibility and quality of silage.In this study,the effects of various additives (formic acid,sucrose,EM bacteria,and cellulase) on the silage quality of the alfalfa cultivar Longdong were investigated by using the first crop of alfalfa as the raw material.The results showed that the sensory evaluation scores of alfalfa silages in the four additive treatment groups were higher than that of the silage in the control group,pH values,acetic acid,and ammonia nitrogen/total nitrogen contents of the silages in the four additive groups were significantly lower than those in the control group silage,and lactic acid content was significantly higher in the treatment group silages than that in the control group silage (P＜0.05).No butyric acid and propionic acid were detected.The contents of crude protein in the silages of the four additive groups were significantly higher than that in the control group,and the content of acid detergent fiber was significantly lower in all additive group silages than that in the control group silage (P＜0.05).The neutral detergent fiber contents of the silages in the sucrose,EM bacteria,and cellulase groups were significantly lower than those of the silages in the formic acid and control groups (P＜0.05).There were no significant differences in the crude ash contents of silages among all the groups (P ＜0.05).The aerobic stability of silages in the four additive groups was significantly higher than that of the silage in the control group (P＜0.05).The results suggested that the four additives can improve the sensory quality,fermentation quality,and nutrient composition of silage produced from the alfalfa cultivar Longdong,and prolong its aerobic stability.The effects of the four kinds of additives on the growth of alfalfa were optimized by adding cellulase. |
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| Keywords: | alfalfa additives silage quality formic acid sugar EM bacteria cellulose enzyme |
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