Precise evaluation of the nutritional value of yeast culture and its effect on pigs fed low-protein diets  

作　　者：Baocheng Hu Tairan Liu Bing Xia Yanjun Dong Ming Liu Junyan Zhou 

机构地区：[1]College of Animal Science and Technology,Beijing University of Agriculture,Beijing 102206,China [2]Beijing China-Agri Hong Ke Bio-Technology Co,Ltd.,Beijing 100226,China

出　　处：《Animal Nutrition》2024年第4期325-338,共14页动物营养(英文版)

基　　金：financially supported by the National Key R&D Program of China(2021YFD1301003);Science and Technology innovation support program of Beijing University of Agriculture(HHXD2022011);National Natural Science Foundation of China(32302797);Research Fund for Academic Degree&Graduate Education of Beijing University of Agriculture(2023YJS035).

摘　　要：The purpose of the present study was to assess the nutritional value of yeast culture(YC)and to explore the effect of YC on growth performance and health of piglets fed low-protein diets.In Exp.1,12 growing barrows were allocated into control diet and YC diet treatments to determine the available energy of YC.Results showed that the digestible energy and metabolizable energy of YC are 12.12 and 11.66 MJ/kg dry matter(DM),respectively.In Exp.2,12 growing barrows were surgically equipped with a T-cannula near the distal ileum and were assigned to 2 dietary treatments(nitrogen-free diet and YC diet),and the amino acid digestibility of YC was determined.In Exp.3,a total of 96 weaned piglets were randomly divided into 4 treatments,including low-protein basal diet(Basal),Basal+0.5%YC(0.5%YC),Basal+1.0%YC(1.0%YC),and Basal+1.5%YC(1.5%YC).The results were as follows:YC supplementation linearly improved the weight gain and feed intake ratio(P<0.001),linearly increased the activity of glutathione peroxidase on d 14(P=0.032)and linearly decreased the concentration of malondialdehyde on d 14(P=0.008)and d 32(P=0.004)in serum,and linearly decreased the concentration of total short-chain fatty acid on d 14 in feces(P=0.045).Compared with other treatments,1.5%YC group showed a greater abundance of various probiotics,such as Prevotellaceae,Prevotella and Turicibacter.In Exp.4,twelve growing barrows with an ileal T-cannula were randomly assigned to Control and 1.5%YC treatments to clarify the impact of YC supplementation on nitrogen balance and nutrient digestibility.Results showed that YC had no significant effect on nitrogen efficiency and nutrient digestibility,except for trend of reducing the total tract digestibility of organic matter(P=0.067).In conclusion,the present study assessed the digestible and metabolizable energy values(12.12 and 11.66 MJ/kg DM,respectively)and standardized ileal digestibility of amino acid(from 43.93%to 82.65%)of YC in pig feed and demonstrated that moderate supplementation of YC(1.5%of diet)can e

关 键 词：Yeast culture Available energy Digestible amino acids Low-protein diet PIG 

分 类 号：O62[理学—有机化学]