Effects of Dietary Proline on Body Composition in Pregnant Huanjiang Mini-Pigs

ZHANG Ting, ZHA Wei, TANG Zilong, KONG Xiangfeng

doi:10.3969/j.issn.1006-267x.2017.02.023

Chinese Journal of Animal Nutrition >

2017 , Vol. 29 >Issue 2: 556 - 561

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.02.023

Molecular Nutrition

Effects of Dietary Proline on Body Composition in Pregnant Huanjiang Mini-Pigs

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1. Key Laboratory for Agro-Ecological Processes in Subtropical Region, Hunan Provincial Engineering Research Center for Healthy Livestock, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;
2. Research Center of Mini-Pig, Huanjiang Observation and Research Station for Karst Ecosystems, Chinese Academy of Sciences, Huanjiang 547100, China

Received date: 2016-08-01

Online published: 2017-02-17

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Abstract

This study was conducted to investigate the effects of dietary proline on body composition in pregnant Huanjiang mini-pigs. Thirty-two pregnant Huanjiang mini-pigs on day 15 of pregnancy were randomly assigned into two groups with eight replicates per group and two pigs per replicate. The pigs were fed the basal diet supplemented with 0.77% L-alanine (isonitrogenous control group) and 1.00% L-proline (proline group), respectively. On days 45 and 70 of pregnancy, one sow per replicate was sacrificed to analyze the body composition, respectively. The results showed that compared with the isonitrogenous control group, the fat percentage of Huanjiang mini-pigs was significantly decreased (P<0.05) and the skin percentage had an increasing trend (0.05≤P < 0.10) in proline group on day 45 of pregnancy; the fat percentage was significantly increased (P<0.05), the skin percentage had a decreasing trend (0.05≤P < 0.10), and the content of proline was significantly increased (P<0.05) and the contents of arginine and alanine had an increasing trend (0.05≤P < 0.10) of longissimus dorsi muscle in proline group on day 70 of pregnancy. The fat percentage was significantly increased and the lean meat percentage and skin percentage were significantly decreased in proline group on day 70 of pregnancy compared with those on day 45 of pregnancy (P<0.05). These findings suggest that dietary proline can increase the deposition of body fat and arginine in pregnant Huanjiang mini-pigs, and the body fat deposition in mid pregnancy is higher than that in early pregnancy, thus it is beneficial to the growth and development of fetuses.

Key words： proline; pregnancy; Huanjiang mini-pigs; body composition; amino acid composition

Cite this article

ZHANG Ting, ZHA Wei, TANG Zilong, KONG Xiangfeng . Effects of Dietary Proline on Body Composition in Pregnant Huanjiang Mini-Pigs[J]. Chinese Journal of Animal Nutrition, 2017 , 29(2) : 556 -561 . DOI: 10.3969/j.issn.1006-267x.2017.02.023

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