Effects of selenium enrichment on fermentation characteristics, selenium content and microbial community of alfalfa silage
文献类型： 外文期刊
作者： Sun, Pengbo 1 ; Ge, Gentu 1 ; Sun, Lin 4 ; Du, Shuai 1 ; Liu, Yichao 1 ; Yan, Xingquan 1 ; Zhang, Jiawei 5 ; Zhang, Yuhan 6 ; Wang, Zhijun 1 ; Jia, Yushan 1 ;
作者机构： 1.Minist Agr, Key Lab Forage Cultivat Proc & High Efficient Util, Beijing, Peoples R China
2.Minist Educ, Key Lab Grassland Resources, Beijing, Peoples R China
3.Inner Mongolia Agr Univ, Coll Grassland Resources & Environm, Hohhot, Peoples R China
4.Inner Mongolia Acad Agr & Anim Husb Sci, Hohhot, Peoples R China
5.Ordos Inst Forestry & Grassland Sci, Ordos, Peoples R China
6.Forestry & Grassland Work Stn Inner Mongolia, Hohhot, Peoples R China
关键词： Alfalfa; Selenium; Biofermentation; Selenium speciation; In vitro digestion
期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.3； 五年影响因子：5.2 ）
ISSN： 1471-2229
年卷期： 2024 年 24 卷 1 期
页码：
收录情况： SCI
摘要： Background Selenium is essential for livestock and human health. The traditional way of adding selenium to livestock diets has limitations, and there is a growing trend to provide livestock with a safe and efficient source of selenium through selenium-enriched pasture. Therefore, this study was conducted to investigate the effects of selenium enrichment on fermentation characteristics, selenium content, selenium morphology, microbial community and in vitro digestion of silage alfalfa by using unenriched (CK) and selenium-enriched (Se) alfalfa as raw material for silage. Results In this study, selenium enrichment significantly increased crude protein, soluble carbohydrate, total selenium, and organic selenium contents of alfalfa silage fresh and post-silage samples, and it significantly decreased neutral detergent fiber and acid detergent fiber contents (p < 0.05). Selenium enrichment altered the form of selenium in plants, mainly in the form of SeMet and SeMeCys, which were significantly higher than that of CK (p < 0.05). Selenium enrichment could significantly increase the lactic acid content, reduce the pH value, change the diversity of bacterial community, promote the growth of beneficial bacteria such as Lactiplantibacillus and inhibit the growth of harmful bacteria such as Pantoea, so as to improve the fermentation quality of silage. The in vitro digestibility of dry matter (IVDMD), in vitro digestibility of acid detergent fibers (IVADFD) and in vitro digestibility of acid detergent fibers (IVNDFD) of silage after selenium enrichment were significantly higher than those of CK (p < 0.05). Conclusion This study showed that the presence of selenium could regulate the structure of the alfalfa silage bacterial community and improve alfalfa silage fermentation quality. Selenium enrichment measures can change the morphology of selenium in alfalfa silage products, thus promoting the conversion of organic selenium.
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