低粗蛋白质补充氨基酸日粮对妊娠母猪繁殖性能和蛋白质代谢的影响

doi:10.16431/j.cnki.1671-7236.2016.09.014

Abstract

Abstract:

In order to study the effect of low crude protein (CP) diet supplemented with amino acids on the reproductive performance and protein metabolism in pregnant sows, a single-factor experimental design was used and twenty-four pregnant sows were randomly divided into three treatments with 8 replicas each according to parity,due date and body weight of sows. The pregnant sows in control group were fed conventional feed with CP level of 14.5%, and the pigs in experimental groups Ⅰ and Ⅱ were fed 12.5% and 10.5% of CP diets supplemented with amino acids,respectively. All diets contain similar amino acid concentration. The experiment began at 20 days after breeding and finished after farrowing. The results showed that:① Low CP diets supplemented with amino acids had no significant effect on the reproductive performance of sows,including the total litter size,number of live litter size,weight at birth and backfat thickness of sows (P>0.05).② The serum urea nitrogen of sows in the control group had no significant difference with experimental group Ⅰ (P>0.05),while significantly higher than experimental group Ⅱ (P<0.05).And there was no significant difference between experimental group Ⅰ and Ⅱ (P>0.05). Serum glucose content also had a downward trend with the decrease of CP level,and that of the control group had no significant difference with experimental group Ⅰ (P>0.05),while significantly higher than experimental group Ⅱ (P<0.05).There was no significant difference between experimental group Ⅰ and Ⅱ (P>0.05). ③ Apparent digestibility of CP showed a trend of increase with the decrease of dietary CP levels. CP apparent digestibility of experimental group Ⅰ had no significant difference with control group (P>0.05),while that of experimental groupⅡ was significant higher than other two group (P<0.05).In conclusion,the low CP diet supplemented with amino acids had no significant effects on the reproductive performance and backfat thickness in pregnant sows.

Key words: pregnant sows; low crude protein diet; amino acid; reproductive performance; protein digestibility; backfat thickness

CLC Number:

S828

CUI Jia-jun, ZHANG He-liang, ZHANG Zhao-qin, LI Ya-kui, LI Guang-dong, ZHAO Xiu-cheng. Effect of Low Crude Protein Diet Supplemented with Amino Acids on Reproductive Performance and Protein Metabolism in Pregnant Sows[J]. , 2016, 43(9): 2310-2316.

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Effect of Low Crude Protein Diet Supplemented with Amino Acids on Reproductive Performance and Protein Metabolism in Pregnant Sows

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