Nano-Selenium Reduces Concentrations of Fecal Minerals by Altering Bacteria Composition in Feedlot Goats

Hu Liu, Kaiyu Mao, Weishi Peng, Allan Degen, Gang Zuo, Yuanting Yang, Jiancheng Han (), Qun Wu, Ke Wang, Qinyang Jiang and Hanlin Zhou ()
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Hu Liu: Zhanjiang Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524013, China
Kaiyu Mao: Zhanjiang Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524013, China
Weishi Peng: Zhanjiang Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524013, China
Allan Degen: Desert Animal Adaptations and Husbandry, Wyler Department of Dryland Agriculture, Blaustein Institutes for Desert Research, Ben-Gurion University of Negev, Beer Sheva 8410500, Israel
Gang Zuo: Beijing Deyuanshun Biotechnology Co., Ltd., Beijing 102206, China
Yuanting Yang: Zhanjiang Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524013, China
Jiancheng Han: Zhanjiang Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524013, China
Qun Wu: Zhanjiang Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524013, China
Ke Wang: Zhanjiang Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524013, China
Qinyang Jiang: College of Animal Science and Technology, Guangxi University, Nanning 530004, China
Hanlin Zhou: Zhanjiang Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524013, China

Agriculture, 2024, vol. 14, issue 12, 1-16

Abstract: This study examined the effect of dietary supplementation of nano-selenium (nano-Se) on the average daily gain (ADG), fecal bacteria community, and concentrations of fecal minerals and volatile fatty acids in feedlot Hainan black goats. Eighteen goats (18.6 ± 0.69 kg) were divided randomly into three groups, with each group receiving a different level of supplementary nano-Se (n = six goats per treatment) as follows: (1) 0.0 mg (CON); (2) 0.2 mg; and (3) 0.4 mg nano-Se/kg dry matter intake (DMI). The final body weight ( p = 0.012) and ADG increased linearly ( p < 0.01), whereas the ratio of DMI to ADG decreased linearly ( p < 0.01) with increasing dietary nano-Se levels. Fecal concentrations of Se increased linearly ( p < 0.001), whereas Cu ( p < 0.01), Zn ( p = 0.020), and Fe ( p = 0.010) decreased linearly with increasing dietary nano-Se levels. The relative abundances of Treponema ( p = 0.046), norank_f__norank_o__Clostridia_UCG-014 ( p < 0.01), norank_ f_norank_o__RF39 ( p < 0.01), Eubacterium_siraeum_group ( p < 0.001), and Family_XIII_AD3011_group ( p = 0.040) increased linearly, and unclassified_f__Lachnospiraceae ( p < 0.001), Rikenellaceae_RC9_gut_group ( p < 0.01), Eubacterium_ruminantium_group ( p = 0.021), and Prevotella ( p < 0.001) decreased linearly with increasing dietary nano-Se levels. It was concluded that supplementary nano-Se could improve ADG and reduce the DMI to ADG ratio and fecal heavy metals by altering the bacterial community in feedlot goats. We recommend a dietary supplementation of approximately 0.4 mg nano-Se/kg DM for feedlot Hainan black goats, but further research is warranted to determine the precise dose and the possible contamination risks of Se.

Keywords: growing performance; dry matter intake to average daily gain ratio; heavy metals; fecal bacteria; volatile fatty acids (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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