Effects of feeding high-moisture corn on growth performance and rumen metabolism in young Simmental bulls
Yu Gao, Kangyu Yao, Linhai Song, Wen Jiang, Min Yang, Yuxin Zhou, Subinur Abduali, Kadriya Abdurayimu, Wei Shao, Liang Yang, Wanping Ren

TL;DR
Feeding young Simmental bulls a diet with 45% high-moisture corn improves their growth and changes rumen metabolism and microbial diversity.
Contribution
The study identifies specific metabolic changes and microbial diversity shifts caused by high-moisture corn in young bulls.
Findings
45% high-moisture corn increased body weight and average daily gain in young Simmental bulls.
High-moisture corn altered rumen fermentation, reducing acetic acid and total VFA but increasing lactic acid.
Rumen microbiota diversity increased, and 52 differential metabolites were linked to key metabolic pathways.
Abstract
This study evaluated the effects of different dietary inclusion levels of high-moisture corn (HMC) on the growth performance and rumen metabolism of young Simmental bulls. Thirty-two young Simmental bulls (243.99 ± 13.52 kg) were randomly allocated to one of four dietary treatments: (1) control group (HMC0), fed a basal diet; (2) HMC15 group, where 15% of the conventional corn in the diet was replaced with HMC; (3) HMC30 group, with a 30% replacement level of HMC; and (4) HMC45 group, with a 45% replacement level of HMC. Live body weights were recorded from all bulls on days 0, 30, 60, and 120. On day 120, rumen fluid samples were also obtained, filtered, and properly preserved at −80 °C for later determination of rumen fermentation and nutrient metabolism profiles. The results demonstrated that on day 120, the body weights of the HMC30 and HMC45 groups were significantly higher than…
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Taxonomy
TopicsRuminant Nutrition and Digestive Physiology · Animal health and immunology · Reproductive Physiology in Livestock
