1. Evaluating fermentation quality, digestibility and aerobic stability of a total mixed ration ensiled with different additives on Tibet plateau
- Author
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Junfeng Li, Zhihao Dong, Qinhua Liu, Yuhong Bao, Jie Zhao, Tao Shao, and Siran Wang
- Subjects
0106 biological sciences ,additive ,Physiology ,tibet plateau ,Total mixed ration ,01 natural sciences ,Article ,aerobic stability ,Ruminant Nutrition and Forage Utilization ,chemistry.chemical_compound ,Acetic acid ,010608 biotechnology ,ensiled total mixed ration ,Genetics ,fermentation quality ,Food science ,Completely randomized design ,Lactobacillus buchneri ,Ethanol ,General Veterinary ,biology ,0402 animal and dairy science ,04 agricultural and veterinary sciences ,biology.organism_classification ,040201 dairy & animal science ,Yeast ,Lactic acid ,chemistry ,QL1-991 ,Animal Science and Zoology ,Fermentation ,Zoology ,Food Science - Abstract
Objective: To investigate the improvement in utilization efficiency of total mixed ration (TMR) on Tibetan plateau, TMR were ensiled with different additives.Methods: A total of 150 experimental silos were prepared in a completely randomized design to evaluate the six treatments: i) control (without additive), ii) Lactobacillus buchneri (L. buchneri), iii) acetic acid, iv) propionic acid, v) 1,2-propanediol; and vi) 1-propanol. After 90 days of ensiling, silos were opened for fermentation quality and in vitro analysis, and then subjected to an aerobic stability test for 14 days.Results: Treating with L. buchneri, acetic acid, 1,2-propanediol and 1-propanol decreased propionic acid contents and yeast number, whereas increased (p0.05) all in vitro parameters including gas production at 24 h (GP24), GP rate constant, potential GP, in vitro DM digestibility and in vitro neutral detergent fibre digestibility. All additives improved the aerobic stability of ensiled TMR to different extents. Specially, aerobic stability of the ensiled TMR were substantially improved by L. buchneri, acetic acid, 1,2-propanediol, and 1-propanol, indicated by stable pH and lactic acid content during the aerobic stability test.Conclusion: L. buchneri, acetic acid, 1,2-propanediol, and 1-propanol had no adverse effect on in vitro digestibility, while ensiling TMR with the additives produced more acetic acid and ethanol, subsequently resulting in improvement of aerobic stability. There is a potential for some fermentation boosting additives to enhance aerobic stability of fermented TMR on Tibetan plateau.
- Published
- 2021