日粮粗蛋白质水平对苏博美利奴羊生长性能、消化代谢及血清生化指标的影响

doi:10.16431/j.cnki.1671-7236.2016.01.016

Abstract

Abstract: The experiment aimed to find out the effects of dietary crude protein levels on growth performance, digestion and metabolism and serum biochemical indexes of Super Merino lamb after weaning.According to the dietary crude protein level, 64 Super Merino weaned lambs were divided into four groups, which the crude protein levels were 13.25%(group Ⅰ), 14.33%(group Ⅱ), 15.53%(group Ⅲ) and 16.60%(group Ⅳ), respectively.The experiment lasted for 60 days, 30 days for the early stage and 30 days for the later stage;And on the 30th and 60th day, blood samples were collected from one head sheep chosen from each replication, and at the end of the feeding test, 3 lambs were randomly selected from each experiment group for a 15 days digestion and metabolism experiment.The results showed that ADFI and ADG in the early and total trial period were significant differences(P<0.05), ADFI and ADG of group Ⅲ were higher than others.The apparent digestibility of nutrients and ME/DE were not significantly changed(P>0.05).In the detection of serum biochemical indexes, there was no significant difference in the earlier stage(P>0.05);At the end of the test, PK and CK showed significant difference between groups(P<0.05).PK presented a rising trend as the protein level improved, CK of group Ⅰ was higher than other groups.In Super Merino lamb early weaning diet, 15.53% protein level in the diet could significantly improve ADG, the apparent digestibility of nutrients, metabolic energy digestibility.At the end of the test, PK and CK were affected by dietary crude protein level significantly.

Key words: protein level; Super Merino lamb; growth; metabolism; biochemical index

CLC Number:

S826.8⁺6

WANG Chun-xin, ZHAO Yun-hui, ZHAO Zhuo, ZHU Jing-liang, ZHAI Bo, ZHAO Feng-jiang, ZHANG Ming-xin. Effects of Dietary Crude Protein Levels on Growth Performance, Digestion and Metabolism, and Serum Biochemical Indexes of Super Merino Lamb[J]. , 2016, 43(1): 108-113.

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Effects of Dietary Crude Protein Levels on Growth Performance, Digestion and Metabolism, and Serum Biochemical Indexes of Super Merino Lamb

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