Effects of Dietary Digestible Energy, Crude Protein and Crude Fiber Levels on Growth Performance, Carcass Traits and Meat Quality of Fattening Sujiang Pigs

ZHOU Genlai, ZHAO Xuting, TAO Yong, YIN Jiexin, REN Shanmao, NI Ligang, ZHANG Junsheng, ZHOU Chunbao

doi:10.3969/j.issn.1006-267x.2018.08.049

2018 , Vol. 30 >Issue 8: 3293 - 3301

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.08.049

Molecular Nutrition

Effects of Dietary Digestible Energy, Crude Protein and Crude Fiber Levels on Growth Performance, Carcass Traits and Meat Quality of Fattening Sujiang Pigs

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1. Jiangsu Agri-Animal Husbandry Vocational College, Taizhou 225300, China;
2. Jiangsu Provincial Engineering Technology Center of Modern Animal Science and New Veterinary Drugs, Taizhou 225300, China;
3. Jiangsu Sujiang Breeding Pig Co., Ltd., Taizhou 225300, China

Received date: 2018-02-03

Online published: 2018-08-18

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Abstract

This study aimed to evaluate the effects of dietary digestible energy (DE), crude protein (CP) and crude fiber (CF) levels on growth performance, carcass traits and meat quality of fattening Sujiang pigs. A total of 162 Sujiang pigs with the body weight of (50.49±4.78) kg were selected and randomly assigned to 9 groups with 3 replicates per group and 6 pigs per replicate (half male and half female). The orthogonal experiment design of three factors and three levels were used to formulate 9 different diets with 3 DE levels (11.64, 12.24 and 12.84 MJ/kg), 3 CP levels (12%, 13% and 14%) and 3 CF levels (5%, 8% and 11%). The prefeeding period lasted for 7 days and the feeding period lasted for 42 days. The results showed as follows:1) the average daily feed intake (ADFI) of pigs in 11.64 MJ/kg DE group was extremely significantly higher than that in 12.24 and 12.84 MJ/kg DE groups (P<0.01), but dietary DE level had no significant effects on average daily gain (ADG) and feed/gain (F/G) (P>0.05). Dietary CP level had no significant effects on ADFI, ADG and F/G (P>0.05). The ADG, ADFI and F/G of pigs in 8% and 11% CF groups were significantly higher (P<0.05), extremely significantly lower (P<0.01) and extremely significantly lower (P<0.01) than those in 5% CF group, respectively. 2) The dressing percentage and carcass length of pigs in 12.24 MJ/kg DE group were significantly higher than those in 11.64 MJ/kg DE group (P<0.05). The average back fat thickness of pigs in 11% CF group was extremely significantly lower than that in 5% CF group (P<0.01). 3) The muscle redness value in 12.84 MJ/kg DE group was extremely significantly higher than that in 11.64 and 12.24 MJ/kg DE groups (P<0.01). The muscle pH_{24 h} of pigs in 13% CP group was significantly lower than that in 12% CP group (P<0.05). The intramuscular fat content of pigs in 8% and 11% CF groups were extremely significantly lower than that in 5% CF group (P<0.01). In conclusion, the appropriate DE, CP and CF levels in diets for fattening Sujiang pigs can be set as 12.24 MJ/kg, 12% and 11%, respectively.

Key words： Sujiang pigs; digestible energy level; crude protein level; crude fiber level; growth performance; carcass traits; meat quality

Cite this article

ZHOU Genlai, ZHAO Xuting, TAO Yong, YIN Jiexin, REN Shanmao, NI Ligang, ZHANG Junsheng, ZHOU Chunbao . Effects of Dietary Digestible Energy, Crude Protein and Crude Fiber Levels on Growth Performance, Carcass Traits and Meat Quality of Fattening Sujiang Pigs[J]. Chinese Journal of Animal Nutrition, 2018 , 30(8) : 3293 -3301 . DOI: 10.3969/j.issn.1006-267x.2018.08.049

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