Improving the quality of rice straw silage with Moringa oleifera leaves and propionic acid: Fermentation, nutrition, aerobic stability and microbial communities
Improving the quality of rice straw silage with Moringa oleifera leaves and propionic acid: Fermentation, nutrition, aerobic stability and microbial communities
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用辣木叶和丙酸提高稻草青贮饲料的质量：发酵、营养、有氧稳定性和微生物群落
DOI：
10.1016/j.biortech.2019.122579
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发表时间：
2020-03-01
影响因子：
11.4
通讯作者：
Zhang, Qing
中科院分区：
文献类型：
--
作者：
He, Liwen;Zhou, Wei;Zhang, Qing
混合青贮是提高营养物质保存和利用率的有效途径。研究了添加辣木叶（MOL）对稻草青贮品质、好氧稳定性和微生物群落的影响。结果表明，添加MOL使稻草青贮料的pH值（4.69 vs 3.85）、丁酸（17.4 g/kg DM vs未检测到）、氨态氮（3.36 vs 2.17 g/kg DM）和纤维素含量（626 vs 462 g/kg DM）降低，蛋白质含量（88.4 vs 125 g/kg DM）增加。乳酸菌相对丰度（12.96%vs50.82%）和伊萨酵母菌相对丰度（2.02%vs36.03%）均有所提高，可能有助于提高青贮饲料的有氧稳定性。丙酸的添加抑制了青贮和暴露过程中脱氨酶的活性。因此，添加MOL可提高稻草青贮的发酵品质和营养价值。
Mixed ensiling is believed an effective way to improve nutrient preservation and utilization. The effect of mixing Moringa oleifera leaves (MOL) on silage quality, aerobic stability and microbial communities of rice straw ensiled with/without propionic acid were investigated after 140 days fermentation. The results showed that mixing MOL decreased the pH (4.69 vs 3.85), butyric acid (17.4 g/kg DM vs not detected), ammonia-N (3.36 vs 2.17 g/kg DM) and fiber contents (626 vs 462 g/kg DM) but increased protein content (88.4 vs 125 g/kg DM) of rice straw silages. It also increased the relative abundance of Lactobacillus (12.96% vs 50.82%) at unsealing and Issatchenkia (2.02% vs 36.03%) after exposure to air, and might improve aerobic stability of silages. The addition of propionic acid could inhibit deaminization activity during ensiling and exposure to air. It is suggested mixing MOL could improve the fermentation quality and nutrition of rice straw silage.