Dietary supplementation with xylooligosaccharides and exogenous enzyme improves milk production, energy utilization efficiency and reduces enteric methane emissions of Jersey cows

Journal of Animal Science and Biotechnology

Research

Tianhai Yan¹  Bowei Li²  Yanhua Gao²  Peter Lund³  Lifeng Dong⁴  Qiyu Diao⁴  Zhuofan Liu⁴  Lei Zhao⁵ 

[1] Agri-Food and Biosciences Institute, Co. Down BT 26 6DR, Hillsborough, UK;College of Life Science and Technology, Southwest Minzu University, 610041, Chengdu, China;Department of Animal Science, Aarhus University, PO Box 50, AU Foulum, 8830, Tjele, Denmark;Institute of Feed Research/Sino-US Joint Lab On Nutrition and Metabolism of Ruminant, Chinese Academy of Agricultural Sciences, 100081, Beijing, China;Institute of Feed Research/Sino-US Joint Lab On Nutrition and Metabolism of Ruminant, Chinese Academy of Agricultural Sciences, 100081, Beijing, China;School of Agriculture, Ningxia University, 750000, Yinchuan, China;

关键词: Energy utilization efficiency;    Enteric methane emissions;    Exogenous enzyme;    Jersey cows;    Xylooligosaccharides;   

DOI  :  10.1186/s40104-023-00873-w

 received in 2022-11-18, accepted in 2023-04-02,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundSustainable strategies for enteric methane (CH4) mitigation of dairy cows have been extensively explored to improve production performance and alleviate environmental pressure. The present study aimed to investigate the effects of dietary xylooligosaccharides (XOS) and exogenous enzyme (EXE) supplementation on milk production, nutrient digestibility, enteric CH4 emissions, energy utilization efficiency of lactating Jersey dairy cows. Forty-eight lactating cows were randomly assigned to one of 4 treatments: (1) control diet (CON), (2) CON with 25 g/d XOS (XOS), (3) CON with 15 g/d EXE (EXE), and (4) CON with 25 g/d XOS and 15 g/d EXE (XOS + EXE). The 60-d experimental period consisted of a 14-d adaptation period and a 46-d sampling period. The enteric CO2 and CH4 emissions and O2 consumption were measured using two GreenFeed units, which were further used to determine the energy utilization efficiency of cows.ResultsCompared with CON, cows fed XOS, EXE or XOS + EXE significantly (P < 0.05) increased milk yield, true protein and fat concentration, and energy-corrected milk yield (ECM)/DM intake, which could be reflected by the significant improvement (P < 0.05) of dietary NDF and ADF digestibility. The results showed that dietary supplementation of XOS, EXE or XOS + EXE significantly (P < 0.05) reduced CH4 emission, CH4/milk yield, and CH4/ECM. Furthermore, cows fed XOS demonstrated highest (P < 0.05) metabolizable energy intake, milk energy output but lowest (P < 0.05) of CH4 energy output and CH4 energy output as a proportion of gross energy intake compared with the remaining treatments.ConclusionsDietary supplementary of XOS, EXE or combination of XOS and EXE contributed to the improvement of lactation performance, nutrient digestibility, and energy utilization efficiency, as well as reduction of enteric CH4 emissions of lactating Jersey cows. This promising mitigation method may need further research to validate its long-term effect and mode of action for dairy cows.

【 授权许可】

CC BY   
© The Author(s) 2023

【 图 表 】

Fig. 1