China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (1): 161-168.doi: 10.16431/j.cnki.1671-7236.2022.01.017

• Nutrition and Feed • Previous Articles     Next Articles

Effects of Compound Plant Extracts on Carcass Traits, Muscle Quality and Serum Indexes of Sujiang Pigs at Fattening Stage

TAO Yong1, REN Shanmao1, SONG Yanyan1, DONG Xiaojun2, ZHAO Xuting1   

  1. 1. Jiangsu Agri-animal Husbandry Vocational College, Taizhou 225300, China;
    2. Animal Health Supervision Institute of Huaian District, Huaian, Jiangsu Province, Huaian 223001, China
  • Received:2021-08-04 Online:2022-01-05 Published:2021-12-29

Abstract: [Objective] The purpose of this experiment was to investigate the effects of compound plant extracts on carcass traits, muscle quality indexes and serum indexes in finishing Sujiang pigs. [Method] 200 healthy Sujiang castrated boars with body mass of 55 kg of 120 days old were randomly divided into 5 groups with 4 replicates in each group and 10 pigs in each replicate. The control group was fed corn-soybean meal basal diet, and the test groups A, B, C, and D were supplemented with 100, 200, 300, and 400 mg/kg plant extracts in the basal diet, respectively. The main ingredients of the plant extracts were Eucommia, Ligustrum lucidum and Schisandra (the ratio was 4:3:1). The main active ingredients of the plant extracts were chlorogenic acid, oleanolic acid and lignans, etc. The whole trial was divided into pre-feeding period (7 d) and formal period (45 d). After the experiment, blood was collected and the experimental pigs were slaughtered. And carcass traits, muscle composition, meat quality, serum biochemical indexes, antioxidant indexes and immune indexes of finishing pigs were determined. [Result] The average backfat thickness of groups B and C were significantly lower than that of control group (P<0.05), and the loin-eye muscle area of group B was significantly higher than that of control group and group A (P<0.05). The normal muscle compositions such as crude protein, crude fat and crude ash did not show difference among the groups (P>0.05). The marbling score of group B was significantly higher than that of control group, groups A and C (P<0.05). The meat color score of groups B and D were significantly higher than that of control group (P<0.05). The a* value of group B was significantly higher than that of control group and group A (P<0.05). Compared with control group, the total serum protein of group B was significantly increased (P<0.05). The serum albumin of group D was significantly higher than that of control group (P<0.05). The serum MDA of groups A and D were significantly lower than that of control group (P<0.05). The IgA of group B was significantly higher than that of control group and group A (P<0.05). There was no significant difference in other indicators among the groups. [Conclusion] The addition of 200 mg/kg compound plant extracts to the basic diet of Sujiang pigs during the fattening period was beneficial to improve carcass traits, muscle quality and serum indexes, and could be used in the production of Sujiang pigs.

Key words: compound plant extract; Sujiang pig; carcass trait; muscle quality; serum index

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