植物蛋白对6—11日龄犊牛腹泻与血液指标的影响

【目的】研究代乳品中植物蛋白含量对6—11日龄犊牛腹泻与血液相关指标的影响。【方法】选择6日龄荷斯坦公犊12头,随机分为3组,分别饲喂植物蛋白占总蛋白20%、50%和80%的代乳品。【结果】当代乳品中植物蛋白占总蛋白的80%时,犊牛7日龄血清IgG较其它组显著降低(P0.05)、9日龄血清碱性磷酸酶较其它组显著升高(P0.05)、犊牛腹泻情况较其它组明显增加且主要集中于过渡期前2—3d;试验各组犊牛生长性能、血清总蛋白、尿素氮、皮质醇和生长激素等均未见显著变化。【结论】犊牛代乳品中植物蛋白含量影响犊牛腹泻与血液相关指标,适宜的植物蛋白质含量(≤50%)有利于犊牛健康及由母乳到代乳品的平稳过渡。

Effect of Different Contents of Plant Protein on the Incidence of Diarrhea and Blood Parameters in Calves Aged 6-11 Days

【Objective】 This study was designed to determine the influence of plant protein contents of milk replacers on the incidence of diarrhea and blood parameters in the calf aged 6-11 days. 【Method】 Twelve male Chinese Holstein calves were randomly assigned to three milk replacers containing 20%, 50% or 80% plant protein of total protein. 【Result】 Compared with the other milk replacers, the milk replacer containing 80% of plant protein of total protein significantly decreased the serum IgG concentration in 7-day-old calves, but significantly increased the serum alkaline phosphatase (AKP) concentration in 9-day-old calves, and significantly elevated the incidence rate of diarrhea in the first 2 or 3 days of experimental period. However, the serum concentration of total protein (TP), urea nitrogen (BUN), cortisol (Cort) and growth hormone (GH) was not different significantly among the treatments. 【Conclusion】 The plant protein content in milk replacers affected the health and blood parameters of 6- to 11-day-old calves, and an appropriate plant protein content below 50% of total milk replacer protein was suggested for the health and the smooth transition from milk to milk replacers of calves.