十二指肠灌注不同必需氨基酸溶液对生长育肥羔羊氮平衡及血浆尿素氮的影响

doi:10.16431/j.cnki.1671-7236.2017.07.013

Abstract

Abstract:

This study was aimed to explore the effects of duodenal infusions of essential amino acid (EAA) on nitrogen balance and plasma urea nitrogen (PUN) of growing-finishing lambs.Five Kazakh male lambs with (29.40±1.76) kg body weights and 4 months old were chosen,fitted with duodenal cannulae and raised in metabolic cage individually. The 5×5 Latin square design was used in this experiment and 7 d for per period. The duodenal infusions in control group contained no EAA,that in 8EAA group contained 8 kinds of EAA,while that in -Arg,-Lys and -Met groups were contained 8 kinds of EAA without Arg,Lys and Met,respectively. The results showed that the fecal N excretion in 8EAA group was no significant difference compared with control group (P>0.05),while the urinary N,N retention,N apparent digestibility and PUN concentration were significantly increased (P<0.05).Compared with 8EAA group,the N retention in -Arg,-Lys and -Met groups were significantly decreased by 30.62%,11.56% and 12.99% (P<0.05),and the daily gain were decreased by 13.89%,7.78% and 6.58% (P>0.05),respectively. PUN concentration was increased in response to the removement of Met,Arg and Lys. In conclusion,Arg,Met and Lys had restricted effect to Kazakh lamb in actual fattening conditions.

Key words: Kazakh lamb; duodenum; infusion; essential amino acid (EAA); nitrogen balance

CLC Number:

S826

ZHANG Fan, GAO Xin-mei, XIAO Min-min, TANG Fu, GAO Wei. Effects of Duodenal Infusions of Essential Amino Acid on Nitrogen Balance and Plasma Urea Nitrogen of Growing-finishing Lambs[J]. , 2017, 44(7): 1990-1996.

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Effects of Duodenal Infusions of Essential Amino Acid on Nitrogen Balance and Plasma Urea Nitrogen of Growing-finishing Lambs

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