Effects of Low Crude Protein Diets with Different Sorghum Levels on Growth Performance, Meat Quality and Serum Amino Acid Concentrations of Growing Pigs

LI Sisi, ZHU Xiaotong, LI Yuying, YIN Jie, FANG Jun, LI Tiejun

doi:10.3969/j.issn.1006-267x.2018.08.013

2018 , Vol. 30 >Issue 8: 2969 - 2978

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.08.013

Molecular Nutrition

Effects of Low Crude Protein Diets with Different Sorghum Levels on Growth Performance, Meat Quality and Serum Amino Acid Concentrations of Growing Pigs

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1. College of Bioscience and Biotechnology, Hunan Agriculture University, Changsha 410128, China;
2. Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Changsha 410125, China;
3. College of Life Science, Guangxi Normal University, Guilin 541004, China;
4. Hunan Co-Innovation Center of Animal Production Safety, Changsha 410128, China

Received date: 2018-02-06

Online published: 2018-08-18

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Abstract

This study was to investigate the effects of low protein diets with different sorghum levels on growth performance, meat quality and serum amino acid concentration of growing pigs. Thirty-six crossbred (Duroc×Landrace) growing pigs with body weight of (30±7) kg were randomly divided into 6 groups with 6 replicates per group and 1 pig per replicate. Pigs in the six groups were fed the experimental diets which the sorghum and CP levels were 0 and 18% (group A), 0 and 15%(group B), 20% and 15%(group C), 50% and 15%(group D), 80% and 15%(group E), 50% and 18%(group F), respectively. The pre-experimental period lasted for 6 days, and the experimental period lasted for 35 days. The results showed as follows:1) when dietary CP level reduced 3%, there were no significant differences on the average daily feed intake, average daily gain and feed to gain ratio between group A and group B, group D and group F (P>0.05). When dietary CP level was 18%, the average daily feed intake of group F was significantly higher than that of group A (P<0.01), and the average daily gain was significantly higher than that of group A (P<0.05). When dietary CP level was 15%, the average daily feed intake of groups D and E was significantly higher than that of group B (P<0.01), the average daily gain of group E was significantly higher than that of group B (P<0.05). 2) There were no significant differences on meat quality indices among all groups (P>0.05). 3) When dietary CP level reduced 3%, there were no significant differences in the serum amino acid concentrations in anterior vena cava, mesenteric vein and portal vein between groups A and B (P>0.05). When dietary CP level was 15%, compared with group B, the serum essential amino acid histidine concentration in anterior vena cava, mesenteric vein and portal vein of groups C, D and E was decreased, the concentrations of nonessential amino acid proline, serine and alanine in anterior vena cava serum were increased, the concentrations of nonessential amino acid proline and alanine in mesenteric vein and portal vein serum were increased. In conclusion, 20% to 80% of sorghum level can replace corn as the energy raw material for growing pigs when dietary CP level is 15%.

Key words： sorghum; growing pigs; growth performance; meat quality; serum amino acids

Cite this article

LI Sisi, ZHU Xiaotong, LI Yuying, YIN Jie, FANG Jun, LI Tiejun . Effects of Low Crude Protein Diets with Different Sorghum Levels on Growth Performance, Meat Quality and Serum Amino Acid Concentrations of Growing Pigs[J]. Chinese Journal of Animal Nutrition, 2018 , 30(8) : 2969 -2978 . DOI: 10.3969/j.issn.1006-267x.2018.08.013

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