添加剂和湿度对高湿度耳玉米发酵质量和细菌群体的影响
Jiajun Li1, Zheng Li2, Songlin Shang1
1College of Animal Science and Technology, Beijing University of Agriculture, Beijing, China.
Frontiers in microbiology
|December 14, 2023
概括
将乳酸细菌添加到高湿度耳玉米 (HMEC) 料中可以提高发酵质量. 与42.5%的水分相结合的KT添加剂,为高质量的动物料带来了最好的结果.
科学领域:
- 农业科学 农业科学
- 微生物学 微生物学
- 动物营养 动物营养
背景情况:
- 玉米 (Zea mays L.) 是全球重要的能源料来源.
- 高湿度耳玉米 (HMEC) 料生产需要优化质量.
- 乳酸细菌 (LAB) 是料发酵的关键.
研究的目的:
- 评估两种LAB添加剂对HMEC料质量的影响.
- 评估不同水分水平对料发酵的影响.
- 分析细菌社区结构的变化,发酵后的变化.
主要方法:
- 治疗HMEC时使用两个LAB混合物 (TQ:植物性乳杆菌+乳杆菌;KT:乳杆菌+乳杆菌) 或对照物 (CK).
- 测试了三个水分水平:37.5% (L),42.5% (M) 和47.5% (H).
- 料被发酵了180天,随后进行了化学和细菌分析.
主要成果:
- 两种TQ和KT添加剂都改善了干物质,原蛋白,粉,乳酸和酸含量,同时降低了pH,NDF,ADF和氨.
- 该KT添加剂在细菌群体结构中显示出更大的增强,具有更高的Firmicutes和Lactobacillus的相对丰度.
- 较高的水分水平 (42.5%和47.5%) 增加了发酵酸和氨,但与37.5%的水分相比,pH值下降了.
结论:
- 添加TQ和KT LAB可以在适当的水分水平下改善HMEC料质量.
- 该KT添加剂在增强料发酵和细菌成分方面表现出卓越的有效性.
- 42.5% (M) 的水分含量是生产高质量的HMEC料的最佳条件.
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