Effects of Prepartum L-Tryptophan Supplementation on the Postpartum Performance of Holstein Cows

Autor: Xuening Liu, Songyang Yao, Yunjie Liu, Huigang Han, Weijia Wang, Qi Yi, Laiqing Yan, Pengyun Ji, Lu Zhang, Guoshi Liu
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Animals, Vol 14, Iss 9, p 1278 (2024)
Druh dokumentu: article
ISSN: 2076-2615
44859317
DOI: 10.3390/ani14091278
Popis: The negative energy balance occurring in the periparturient period of cows will impede their health and postpartum performance. To target this issue, L-tryptophan was supplied to the prepartum cows. The results showed that L-tryptophan supplementation significantly increased the serum melatonin level and was accompanied with increases in SOD activity, IL-10 and colostrum IgA levels as well as decreases in MDA and IL-6 levels compared to the control cows. The incidence of postpartum diseases was significantly lower and the pregnancy rate was significantly higher in cows fed L-tryptophan than in the control group. A striking observation was that prepartum L-tryptophan supplementation not only improved the milk production but also the quality compared to the control cows. In general, supplementation with L-tryptophan in the prepartum period can improve the postpartum reproduction and lactation performance of cows to some extent.
Databáze: Directory of Open Access Journals
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