State Key Laboratory of Animal Nutrition and Feeding, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100193, China; Department of Animal Science, Shandong Vocational Animal Science and Veterinary College, Weifang, Shandong, 261061, China; Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, Quebec, H9X 3V9, Canada.
State Key Laboratory of Animal Nutrition and Feeding, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
J Environ Manage. 2024 Mar;355:120469. doi: 10.1016/j.jenvman.2024.120469. Epub 2024 Mar 2.
Crop byproducts can be supplemented in livestock feeds to improve the utilization of resources and reduce greenhouse gas (GHG) emissions. We explored the mitigation potential of GHG emissions by supplementing crop byproducts in feeds based on a typical intensive dairy farm in China. Results showed that GHG emissions associated with production of forage were significantly decreased by 25.60 % when no GHG emissions were allocated to crop byproducts, and enteric methane emission was significantly decreased by 13.46 % on the basis of CO eq, g/kg fat and protein corrected milk. The supplementation did not affect lactation performance, rumen microbiota and microbial enzymes at the gene level. Metabolomics analysis revealed changes in amino acid catabolism of rumen fluid, which were probably responsible for more propionate production. In conclusion, supplementing crop byproducts in feeds can be a potential strategy to reduce GHG emissions of livestock.
农作物副产物可以作为饲料的补充物，以提高资源利用率并减少温室气体（GHG）排放。本研究基于中国典型集约化奶牛场，探讨了用农作物副产物补充饲料对减少 GHG 排放的缓解潜力。结果表明，如果不对农作物副产物进行 GHG 排放分配，则饲料中添加农作物副产物可使饲料生产中的 GHG 排放显著减少 25.60%，基于 CO eq、g/kg 脂肪和蛋白质校正乳校正的瘤胃甲烷排放显著减少 13.46%。该补充物不影响泌乳性能、瘤胃微生物区系和基因水平的微生物酶。代谢组学分析显示，瘤胃液中氨基酸分解代谢发生变化，这可能是丙酸产量增加的原因。总之，在饲料中添加农作物副产物可能是减少畜牧业 GHG 排放的一种潜在策略。
