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Effects of Lysolecithin on Growth Performance, Nutrient Digestibility, Serum Biochemical Indices, and Rumen Environment in Holstein Calves
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DOI：10.1002/fsn3.71320.png)
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Abstract
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This study was to evaluate the effects of lysolecithin on the growth performance, serum biochemical indices, and rumen environment of Holstein calves. A total of 26 calves were divided into a control group with a basal diet (CON) and a treatment group that added 5 g/d lysolecithin (LY). Compared to the CON, the proportion of feces in the middle sieve was higher, and the proportion of the bottom sieve was lower in the LY (p < 0.05). Serum biochemical parameters indicated that the LY had higher albumin, total antioxidant capacity, and total cholesterol, whereas non-esterified fatty acid, blood urea nitrogen, and triglyceride were lower than the CON (p < 0.05). The NH3-N of rumen fluid in the LY was lower than that of the CON (p < 0.05). The rumen fluid percentage of butyrate, iso-butyrate, valerate, and iso-valerate in the LY was higher than in the CON (p < 0.05), with a tendency for lower propionate compared to the CON (p < 0.10). In the rumen microorganism, the abundance of Ruminococcus in the LY was higher than in the CON (p < 0.05). Mantel test indicated that the percentage of acetate was found significantly positively correlated with Candidatus_Saccharimonas, whereas propionate exhibited positive correlations with Ruminococcus_gauvreauii_group, Candidatus_Saccharimonas, and unclassified Lachnospiraceae (p < 0.05). Additionally, the NK4A214_group showed a significant positive correlation with the acetate/propionate, and the concentration of iso-valerate was positively correlated with norank_f__norank_o__Clostridia_UCG-014 (p < 0.05). In summary, dietary lysolecithin supplementation could positively influence the rumen microbial community, enhance rumen fermentation, and improve antioxidant ability, without affecting growth performance in Holstein calves.
Keywords:
growth performance
Holstein calves
lysolecithin
nutrient digestibility
rumen environment
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