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动物营养(英文)
2024,18
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Animal Nutrition
2024,18
Dietary crude protein and protein solubility manipulation enhances intestinal nitrogen absorption and mitigates reactive nitrogen emissions through gut microbiota and metabolome reprogramming in sheep.
作 者：
Zhenbin Zhang;Yiquan Sun;Xinhuang Zhong;Jun Zhu;Si‐Han Yang;Yalan Gu;Xiang Yu;Yue Lu;Zhiqi Lu;Xuezhao Sun;Mengzhi Wan
关键词：
Energy and nitrogen utilization efficiency;Fecal microbiota and metabolome;Low-protein diet;Nitrogen metabolism;Reactive nitrogen;Soluble protei
摘 要：
Dietary nutrient manipulation (e.g. protein fractions) could lower the environmental footprints of ruminants, especially reactive nitrogen (N). This study investigated the impacts of dietary soluble protein (SP) levels with decreased crude protein (CP) on intestinal N absorption, hindgut N metabolism, fecal microbiota and metabolites, and their linkage with N metabolism phenotype. Thirty-two male Hu sheep, with an age of six months and an initial BW of 40.37 ± 1.18 kg, were randomly assigned to four dietary groups. The control diet (CON), aligning with NRC standards, maintained a CP content of 16.7% on a dry matter basis. Conversely, the experimental diets (LPA, LPB, and LPC) featured a 10% reduction in CP compared with CON, accompanied by SP adjustments to 21.2%, 25.9%, and 29.4% of CP, respectively. Our results showed that low-protein diets led to significant reductions in the concentrations of plasma creatinine, ammonia, urea N, and fecal total short-chain fatty acids (SCFA) (
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