饲粮粗纤维水平对猪生长性能、胴体性状及肉品质的影响

doi:10.16431/j.cnki.1671-7236.2024.07.006

Abstract

Abstract: 【Objective】 The purpose of this study was to investigate the effects of dietary crude fiber levels on growth performance,carcass traits and meat quality in Mashen (MS) pigs and Duroc×Landrace×Yorksire (DLY) pigs,so as to provide the theoretical basis for the construction of the precise nutrition requirements and production of high-quality meat in pigs.【Method】 Eighty healthy MS pigs and eighty DLY pigs with an initial body weight of (49.67±5.85) kg were selected and randomly divided into four treatment groups with five replicates per treatment and four pigs per replicate within breed.Four diets with crude fiber level of 2%,5%,8% and 11% were fed to pigs in the corresponding treatment group,which named 2% CF,5% CF,8% CF and 11% CF groups,respectively.The pre-test period was 7 days and the formal test period was 30 days.At the end of the experiment,three MS pigs and three DLY pigs with similar body weight of the treatment average weight were selected from each group and slaughtered,carcass traits and meat quality were measured.【Result】 The dietary crude fiber levels had significant effects on growth performance of pigs.The average daily gain of MS pigs in 11% CF group was significantly lower than those in other three groups (P＜0.05),and the feed-to-gain of DLY pigs in 11% CF group was significantly higher than those in other three groups (P＜0.05).The dietary crude fiber levels had significant effects on carcass traits,such as the backfat thickness,eye muscle area and hind leg ratio.The backfat thickness of MS pigs in 2% CF group was significantly higher than those in other three groups (P＜0.05),and the backfat thickness of DLY pigs in 11% CF group was significantly lower than those in other three groups (P＜0.05).The eye muscle area was gradually increased with the increase of the dietary crude fiber levels both in MS and DLY pigs,which in 11% CF group was extremely significantly higher than those in other three groups (P＜0.01),and which in 8% CF group was significantly higher than those in 2% and 5% CF groups (P＜0.05).The hind leg ratio of MS pigs in 5% and 8% CF groups was significantly higher than those in other two groups (P＜0.05).The meat quality was also affected by the dietary crude fiber levels.The intramuscular fat (IMF) content of MS pigs in 2% and 5% CF groups was extremely significantly higher than those in 8% and 11% CF groups (P＜0.01). The cysteine content in 5% CF group of MS pigs were significantly higher than those in other three groups (P＜0.05),and the methionine content in 2% CF group were significantly lower than those in other three groups (P<0.05).The contents of palmitic acid,stearic acid,oleic acid and linoleic acid of MS pigs in 8% CF group were the highest,and the change trend in DLY pigs was in opposition.【Conclusion】 When feeding MS pigs with a diet with 8% CF,the feed conversion rate and eye muscle area increased,the backfat thickness decreased,and the meat color improved.When feeding DLY pig with a diet containing 5% CF,the daily weight gain,feed conversion rate and eye muscle area increased,and the body structure and muscle tenderness were better.

Key words: pigs; crude fiber; growth performance; carcass traits; meat quality

CLC Number:

S816.31

YUN Hongmei, ZHAO Xinyu, ZHAO Xiaolei, ZHAO Yan, YANG Yang, NIU Jin, GUO Xiaohong, LI Bugao, CAO Guoqing. Effects of Dietary Crude Fiber Levels on Growth Performance, Carcass Traits and Meat Quality in Pigs[J]. China Animal Husbandry and Veterinary Medicine, 2024, 51(7): 2787-2798.

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Effects of Dietary Crude Fiber Levels on Growth Performance, Carcass Traits and Meat Quality in Pigs

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