草地学报

草地学报 ›› 2022, Vol. 30 ›› Issue (9): 2522-2528.DOI: 10.11733/j.issn.1007-0435.2022.09.035

• 技术研发 • 上一篇    

不同丙酸浓度对天然牧草青贮品质及有氧稳定性的影响

张佳伟1, 贾玉山1, 格根图1, 王志军1, 包健1, 李宇宇1, 彭冬2, 王宇1, 孙鹏波1, 岳晓明3   

  1. 1. 内蒙古农业大学草原与资源环境学院, 农业农村部饲草栽培、加工与高效利用重点实验室, 内蒙古 呼和浩特 010019;
    2. 乌海市检验检测中心, 内蒙古 乌海市 016000;
    3. 乌拉盖管理区绿野草业有限公司, 内蒙古 锡林浩特 026000
  • 收稿日期:2022-03-01 修回日期:2022-05-05 出版日期:2022-09-15 发布日期:2022-09-30
  • 通讯作者: 贾玉山,E-mail:jys_nm@sina.com
  • 作者简介:张佳伟(1999-),男,内蒙古太仆寺旗人,硕士研究生,主要从事牧草加工与利用研究,E-mail:1845142196@qq.com
  • 基金资助:
    内蒙古自治区科技计划项目（2020GG0032）；“国家乳业技术创新中心创建”重点项目（2021-国家乳创中心-1）；内蒙古自治区研究生科研创新项目（S20210203Z）；内蒙古自治区科技创新引导项目（项目编号：KCBJ2018047）；财政部和农业农村部：国家现代农业产业技术体系资助

Effects of Different Propionic Acid Concentration on the Quality and Aerobic Stability of Natural Forage Silage

ZHANG Jia-wei1, JIA Yu-shan1, GE Gen-tu1, WANG Zhi-jun1, BAO Jian1, LI Yu-yu1, PENG Dong2, WANG Yu1, SUN Peng-bo1, YUE Xiao-ming3   

  1. 1. Key Laboratory of Forage Grass Cultivation, Processing and Efficient Utilization of Ministry of Agriculture and Rural Affairs, College of Grassland Resources and Environment, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010019, China;
    2. Wuhai Inspection and Testing Center, Wuhai, Inner Mongolia 016000, China;
    3. Wulagai Management Area Lvye grass husbandry Limited Company, Xilinhaote, Inner Mongolia 026000, China
  • Received:2022-03-01 Revised:2022-05-05 Online:2022-09-15 Published:2022-09-30

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摘要： 为改善天然牧草青贮品质，研究不同丙酸浓度对天然牧草青贮品质及有氧稳定性的影响，以确定天然牧草青贮丙酸最适添加量。试验以锡林浩特市毛登牧场天然打草场的牧草为原料，共设四个处理组，丙酸添加量分别为0 mL·kg-1（CK，对照组），2 mL·kg-1（T1），4 mL·kg-1（T2），6 mL·kg-1（T3），在厌氧发酵60天后测定其营养品质、发酵品质、微生物数量及有氧稳定性。结果表明：与对照组比较，各丙酸浓度处理组均显著提高了可溶性碳水化合物（Water soluble carbohydrates，WSC）含量（P<0.05）、提高了粗蛋白质（Crude protein，CP）含量、显著降低了pH值（P<0.05）、显著提高了乳酸含量（P<0.05）；各丙酸浓度处理组中乳酸菌含量均显著提高（P<0.05）、大肠杆菌含量均显著降低（P<0.05）、有氧稳定性均显著提高。说明添加丙酸可以改善天然牧草青贮品质且提高有氧稳定性，在丙酸添加量为2 mL·kg-1时即可达到较好效果。

关键词: 丙酸, 天然牧草, 营养品质, 发酵品质, 有氧稳定性

Abstract: In order to improve the quality of natural forage silage, the effects of different concentrations of propionic acid on the quality and aerobic stability of natural forage silage were studied to determine the optimal addition amount of propionic acid in natural forage silage. The natural forage grasses in Maodeng pasture of Xilinhaote City were used as materials in the experiment, and four treatment groups were set up based on the propionic acid addition including 0 mL·kg-1 (CK, control group), 2 mL·kg-1(T1), 4 mL·kg-1(T2) and 6 mL·kg-1(T3). After 60 days of anaerobic fermentation, the nutritional quality, fermentation quality, microbial quantity and aerobic stability were determined. The results showed that compared with the control group, the content of Water soluble carbohydrates (WSC) significantly increased (P<0.05), the content of Crude protein (CP) increased, the pH value significantly decreased (P<0.05), and the lactic acid content significantly increased (P<0.05) in any adding propionate treatment group. The content of lactic acid bacteria significantly increased (P<0.05), the content of Escherichia coli significantly decreased (P<0.05), and the aerobic stability significantly improved in any propionate concentration treatment group. The results showed that the addition of propionic acid could improve the quality and aerobic stability of natural forage silage, and the best effect was the addition of 2 mL·kg-1propionic acid.

Key words: Propionic acid, Native grass, Nutritional quality, Fermentation quality, Aerobic stability

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