Tao Ya, Niu Dongze, Li Feng, Zuo Sasa, Sun Qizhong, Xu Chuncheng
College of Engineering, China Agricultural University, Beijing 100083, China.
Grassland Research Institute, Chinese Academy of Agricultural Sciences, Hohhot 010010, China.
Animals (Basel). 2020 Sep 24;10(10):1733. doi: 10.3390/ani10101733.
(OG) is a leguminous forage that is potentially valuable for solving the shortage of feed for livestock production, while, in large quantities, it may be toxic because of its swainsonine (SW) content. In this study, OG was ensiled with whole-plant corn ( L.) at 10:0, 9:1, 8:2, 7:3, 6:4, 5:5, 4:6, and 0:10 ratios on a fresh matter basis, and, after 60 d of ensiling, the chemical composition, fermentation characteristic, SW removal rate, lactic acid bacteria (LAB) populations, and their capabilities for SW removal were analyzed. As the proportion of corn in the silage increased, the pH, as well as the propionic acid, ammonia-N, dry matter, crude protein, and SW contents, decreased linearly, while the lactic acid, neutral detergent fiber, and residual water-soluble carbohydrate contents increased linearly. was the most common microorganism present in all mixture silages. and were prevalent at lower ratios of corn to OG. Meanwhile, the LAB strains belong to and had a higher SW removal rate. Our results suggested that ensiling OG with whole-plant corn improves fermentation and decreases SW content, and that 5:5 is the optimal ratio, so this type of mixed silage could make OG useable for ruminant production.
（OG）是一种豆科牧草，对于解决畜牧生产饲料短缺问题具有潜在价值，然而，大量的OG由于含有苦马豆素（SW）可能具有毒性。在本研究中，将OG与全株玉米（L.）按鲜重比10:0、9:1、8:2、7:3、6:4、5:5、4:6和0:10进行青贮，青贮60天后，分析其化学成分、发酵特性、SW去除率、乳酸菌（LAB）数量及其去除SW的能力。随着青贮料中玉米比例的增加，pH值以及丙酸、氨态氮、干物质、粗蛋白和SW含量呈线性下降，而乳酸、中性洗涤纤维和残留水溶性碳水化合物含量呈线性增加。是所有混合青贮料中最常见的微生物。在玉米与OG比例较低时，和较为普遍。同时，属于和的LAB菌株具有较高的SW去除率。我们的结果表明，将OG与全株玉米青贮可改善发酵并降低SW含量，5:5是最佳比例，因此这种类型的混合青贮料可使OG用于反刍动物生产。
