不同代谢蛋白质水平饲粮对8~10月龄后备奶牛生长发育、血液生化指标和体况评分的影响

葛汝方, 陈青, 霍永久, 朱建民, 王梦芝, 喻礼怀, 王洪荣

doi:10.3969/j.issn.1006-267x.2015.03.031

动物营养学报 >

2015 , Vol. 27 >Issue 3: 910 - 917

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.03.031

研究简报 Short Communications

不同代谢蛋白质水平饲粮对8~10月龄后备奶牛生长发育、血液生化指标和体况评分的影响

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1. 扬州大学动物科技学院, 扬州 225009;
2. 扬州大学试验农牧场, 扬州 225008

葛汝方(1990—),男,山东潍坊人,硕士研究生,从事反刍动物营养与饲料研究。E-mail:754677056@qq.com

收稿日期: 2014-09-25

网络出版日期: 2015-03-18

基金资助

国家"十二五"科技支撑计划课题"后备牛营养需要量参数及配套精细饲养工艺研究"(2012BAD12B02-2)

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Effects of Different Dietary Metabolizable Protein Levels on Growth and Development, Blood Biochemical Indices and Body Condition Scores of 8 to 10-Month-Old Heifers

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1. College of Animal Science and Technology, Yangzhou University, Yangzhou 255009, China;
2. The Experiment Farm of Yangzhou University, Yangzhou 255008, China

Received date: 2014-09-25

Online published: 2015-03-18

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摘要

本试验旨在研究不同代谢蛋白质(MP)水平饲粮对8~10月龄后备奶牛生长发育、血液生化指标以及体况评分的影响。选取健康的8月龄中国荷斯坦后备奶牛24头,随机分为4组,每组6头,饲喂MP水平分别为9.03%、9.55%、10.09%和10.57%的4种饲粮[对应的小肠可消化粗蛋白质(IDCP)水平分别为6.87%、8.13%、9.40%和10.65%]。预试期15 d,正试期60 d。结果表明:1)MP和IDCP满足线性回归方程MP=6.234+0.408×IDCP(R²=0.999,P<0.01,n=4)。2)MP水平为9.03%、9.55%、10.09%和10.57%的4组平均日增重(ADG)分别为0.93、1.04、1.09和1.00 kg/d,10.09%组显著高于9.03%组(P<0.05);9.55%组和10.09%组腹围显著或极显著高于9.03%组(P<0.05或P<0.01)。3)随着MP水平的提高,血清尿素氮(UN)含量逐渐提高,8和9周龄9.55%、10.09%和10.57%组极显著高于9.03%组(P<0.01),至10周龄9.55%、10.09%组与9.03%组差异不显著(P>0.05)。4)各组试验牛体况评分在3.57~3.90之间,各组之间差异不显著(P>0.05),体况发育良好。综合生长发育、血液生化指标和体况评分等各方面的因素,在本试验条件下,饲粮MP水平为10.09%时,可满足8~10月龄中国荷斯坦后备奶牛ADG为1.09 kg/d的生长需要。

关键词： 代谢蛋白质; 荷斯坦后备奶牛; 生长发育; 体况评分

本文引用格式

葛汝方, 陈青, 霍永久, 朱建民, 王梦芝, 喻礼怀, 王洪荣 . 不同代谢蛋白质水平饲粮对8~10月龄后备奶牛生长发育、血液生化指标和体况评分的影响[J]. 动物营养学报, 2015 , 27(3) : 910 -917 . DOI: 10.3969/j.issn.1006-267x.2015.03.031

Abstract

This study was conducted to investigate the effects of different dietary metabolizable protein (MP) levels on growth and development, blood biochemical indices and body condition score (BCS) of 8 to 10-month-old heifers. Twenty four Chinese Holstein heifers were randomly divided into four groups with six heads per group, and were fed four different diets in which MP level was 9.03%, 9.55%, 10.09% and 10.57%, respectively, accordingly, IDCP level was 6.87%, 8.13%, 9.40% and 10.65%, respectively. The pre-experimental period was 15 days, and the experimental period was 60 days. The results showed as follows: 1) MP and IDCP satisfied the equation of MP=6.234+0.408×IDCP (R²=0.999, P<0.01, n=4). 2) The ADG in groups with MP levels of 9.03%, 9.55%, 10.09% and 10.57% was 0.93, 1.04, 1.09 and 1.00 kg/d, respectively, and 10.09% group was significantly higher than 9.03% group (P<0.05); the abdominal girth in 9.55% and 10.09% groups was significantly higher than that in 9.03% group (P<0.05 or P<0.01). 3) With the improvement of MP level, serum urinary nitrogen (UN) content was increased accordingly, and 9.55%, 10.09% and 10.57% groups was significantly higher than 9.03% group at 8 to 9 months of age (P<0.01), while there was no significant difference among 9.03%, 9.55% and 10.09% groups at 10 months of age (P>0.05). 4) The BCS of all heifers in different groups was between 3.57 and 3.90 without significant difference (P>0.05), and the body was well developed. As growth and development, blood biochemical indices and BCS are considered, it is concluded that 10.09% MP level in diet can meet the needs of 8 to 10-month-old Chinese Holstein heifers gaining 1.09 kg/d in the present experimental condition.

Key words： metabolizable protein; Holstein heifers; growth and development; body condition score

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