欢迎访问《草业学报》官方网站,今天是 分享到:

草业学报 ›› 2017, Vol. 26 ›› Issue (9): 214-220.DOI: 10.11686/cyxb2017164

• 研究简报 • 上一篇    下一篇

不同处理方式对籽粒苋青贮品质的影响

刘艳芳1,2, 邱昊日1, 余雄1, 孙国庆2, 马健1,*, 张德隆1, 森巴提·黑力木别克1   

  1. 1.新疆农业大学动物科学学院,新疆 乌鲁木齐 830052;
    2.中国农业大学动物科技学院,北京 100193
  • 收稿日期:2017-03-31 修回日期:2017-05-05 出版日期:2017-09-20 发布日期:2017-09-20
  • 通讯作者: *通信作者Corresponding author. E-mail:Crazyma0411@163.com
  • 作者简介:刘艳芳(1992-),女,山东德州人,在读硕士。E-mail:13611235024@163.com
  • 基金资助:
    “现代农业(奶牛)产业技术体系建设专项资金”(CARS-37)和新疆农业大学大学生创新项目平台资助

Effects of addition of lactic acid bacteria, glucose, and formic acid on the quality of Amaranthus hypochondriacus silage

LIU Yan-Fang1,2, QIU Hao-Ri1, YU Xiong1, SUN Guo-Qing2, MA Jian1,*, ZHANG De-Long1, SENBATI Heilimubuick1   

  1. 1.College of Animal Science and Technology, Xinjiang Agricultural University, Urumqi 830052, China;
    2.College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
  • Received:2017-03-31 Revised:2017-05-05 Online:2017-09-20 Published:2017-09-20

摘要: 试验以籽粒苋为材料,在青贮中分别添加乳酸菌制剂、葡萄糖和甲酸3种添加剂,研究不同的处理方式对籽粒苋青贮动态发酵品质以及营养成分的影响,以明确青贮添加剂对粒苋青贮的作用,为籽粒苋青贮饲料的合理利用提供研究途径。试验设5个处理组:对照组,不加任何添加剂;乳酸菌制剂组,按1 kg乳酸菌制剂调制3~4 t籽粒苋鲜草装罐;葡萄糖组,添加量为30 g/kg;乳酸菌制剂和葡萄糖组,添加量与单独添加时一致;甲酸组,添加量为5 g/kg。在发酵第1,3,9,30和57 天分别开罐取样,检测样品中pH、乳酸、氨态氮、干物质、粗蛋白和中性洗涤纤维等指标。结果表明,在籽粒苋青贮同时加入乳酸菌制剂和葡萄糖可以快速发酵,产生大量乳酸,迅速降低青贮pH值,显著降低乙酸、中性洗涤纤维含量和氨态氮/总氮(P<0.05),并能显著提高干物质和粗蛋白含量(P<0.05);加入甲酸可以显著降低乙酸含量(P<0.05),对干物质含量没有明显影响(P>0.05)。综上所述,籽粒苋通过制作青贮饲料可以保存营养成分,与籽粒苋自然青贮相比,籽粒苋青贮时加入上述青贮添加剂均可不同程度的改善青贮品质,同时加入乳酸菌和葡萄糖对青贮改善效果最佳。

Abstract: The aim of this research was to optimize the method for making Amaranthus hypochondriacus silage. We tested the effects of adding lactic acid bacteria, glucose, and formic acid on the fermentation quality and nutritional composition of A. hypochondriacus silage. The five treatments were as follows: control (no additives), lactic acid bacteria group (lactic acid bacteria added at 0.25-0.33 g/kg), glucose group (glucose added at 30 g/kg), lactic acid bacteria+glucose group (added at the same levels as in individual treatments) and formic acid group (formic acid added at 5 g/kg). Silos containing each treatment were opened on days 1, 3, 9, 30, and 57, and the pH and the contents of lactic acid, ammonia nitrogen, total nitrogen, lactic acid, acetic acid, dry matter, crude protein, and neutral detergent fiber in the ensiling samples were determined. The results showed that the additions accelerated the fermentation process. The addition of glucose and lactic acid bacteria to A. hypochondriacus silage resulted in greater fermentation, more lactic acid, and lower pH values. These additions also significantly reduced the contents of acetic acid and neutral detergent fiber and the ammonia nitrogen∶total nitrogen ratio (P<0.05), and significantly increased the contents of dry matter and crude protein (P<0.05). Adding formic acid markedly decreased the acetic acid content (P<0.05), but did not affect the dry matter content (P>0.05). We concluded that the nutritional composition of A. hypochondriacus can be preserved by making silage. Our results showed that addition of lactic acid bacteria, glucose, and formic acid can improve the quality of A. hypochondriacus silage, and that the best results were obtained by adding lactic acid bacteria and glucose.