Effects of Additives on the Fermentation Quality and Aerobic Stability of Mixed Silages in Tibet

doi:10.11733/j.issn.1007-0435.2014.06.032

Acta Agrestia Sinica ›› 2014, Vol. 22 ›› Issue (6): 1353-1359.DOI: 10.11733/j.issn.1007-0435.2014.06.032

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Effects of Additives on the Fermentation Quality and Aerobic Stability of Mixed Silages in Tibet

SUN Xiao-hui¹, YUAN Xian-jun¹, GUO Gang¹, WEN Ai-you³, WANG Jian¹, YU Cheng-qun², SHAO Tao¹

1. Institute of Ensiling and Processing of Grass, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China;
2. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
3. College of Animal Science and Technology, Anhui Science and Technology University, Fengyang, Anhui Province 233100, China

Received:2014-02-18 Revised:2014-04-23 Online:2014-12-15 Published:2014-12-01

添加剂对西藏混合青贮发酵品质和有氧稳定性的影响

孙肖慧¹, 原现军¹, 郭刚¹, 闻爱友³, 王坚¹, 余成群², 邵涛¹

1. 南京农业大学动物科学技术学院饲草调制加工与贮藏研究所, 江苏南京 210095;
2. 中国科学院地理科学与资源研究所, 北京 100101;
3. 安徽科学技术学院动物科技学院, 安徽凤阳 233100

通讯作者: 邵涛
作者简介:孙肖慧(1989-),女,山西吕梁人,硕士研究生,研究方向为饲草调制加工与贮藏,E-mail: sunxiaohui1016@163.com
基金资助:
“十二五”国家科技支撑计划(2011BAC09B03); 中国科学院西藏区域创新平台建设项目“促进农牧民增收的西藏农牧结合技术体系构建与示范”;西藏主要农作物秸秆与栽培牧草混合青贮关键技术研究(XZ20093ZD)资助

Abstract

Abstract:

In order to evaluate the effects of adding molasses, potassium sorbate and their combinations on the fermentation qualities and aerobic stability of mixed silages of 70% oat (Avena sativa)and 30% alfalfa(Medicago sativa), 4 treatments were prepared as follows: control (C), 4% molasses (M), 0.15% potassium sorbate (S), potassium sorbate+ molasses (S+M). Silos were opened on the 30, 45, 60^th day of ensiling, respectively, and the fermentation quality was analyzed. The rest silos were opened to expose to the air after ensiling 60 days. Chemical analyses were carried out on the 5, 10, 15^th days after exposing to air. M and S+M treatments had significantly lower pH values and higher lactic acid contents(P<0.05)compared to control, indicating that the addition of M and S+M improved the fermentation quality of mixed silages efficiently. However, S was unavailable to improve fermentation quality. During aerobic exposure, the pH values of the control and M treatment increased rapidly, the contents of lactic acid reduced significantly(P<0.05). The pH values and the contents of lactic acid and water soluble carbohydrate of the S and the S+M treatments were relatively stable. Based on results, the S+M was practicable to improve fermentation quality with better aerobic stability.

Key words: Additives, Mixed silage, Fermentation quality, Aerobic stability

摘要：

为评价添加糖蜜、山梨酸钾和山梨酸钾+糖蜜对西藏地区燕麦(Avena sativa)和紫花苜蓿(Medicago sativa)(7:3)混合青贮发酵品质和有氧稳定性的影响,设对照组(C),4%糖蜜组(M),0.15%山梨酸钾组(S)和山梨酸钾+糖蜜(S+M)4个处理,青贮后第30,45,60 d开窖取样,测定青贮饲料的发酵品质,其他青贮窖在发酵60 d后全部打开,暴露于空气中5,10,15 d后取样分析其有氧稳定性.结果表明:与对照组相比,M组及S+M组pH显著降低,乳酸含量显著升高(P<0.05),有效地改善了混合青贮发酵品质,S组改善效果不显著.有氧暴露过程中,对照组和M组pH值迅速升高,乳酸含量显著减少(P<0.05),S组和S+M组的pH值、乳酸、水溶性碳水化合物等含量相对稳定.表明S+M组既能提高燕麦和紫花苜蓿混合青贮发酵品质,又能改善有氧稳定性.

关键词: 添加剂, 混合青贮, 发酵品质, 有氧稳定性

CLC Number:

S324
S543.6

SUN Xiao-hui, YUAN Xian-jun, GUO Gang, WEN Ai-you, WANG Jian, YU Cheng-qun, SHAO Tao. Effects of Additives on the Fermentation Quality and Aerobic Stability of Mixed Silages in Tibet[J]. Acta Agrestia Sinica, 2014, 22(6): 1353-1359.

孙肖慧, 原现军, 郭刚, 闻爱友, 王坚, 余成群, 邵涛. 添加剂对西藏混合青贮发酵品质和有氧稳定性的影响[J]. 草地学报, 2014, 22(6): 1353-1359.

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Effects of Additives on the Fermentation Quality and Aerobic Stability of Mixed Silages in Tibet

添加剂对西藏混合青贮发酵品质和有氧稳定性的影响

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