China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (4): 1092-1098.doi: 10.16431/j.cnki.1671-7236.2020.04.014

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Effects of Zinc Methionine Instead of Zinc Sulfate on Growth Performance, Meat Quality and Antioxidant Status of Broilers

WU Liang1, ZHAO Xu2, ZOU Tianhao3, ZHANG Qiuhua3, YANG Zaibin3   

  1. 1. Huangdao Customs District People's Republic of China, Qingdao 266500, China;
    2. College of Agriculture and Forestry Science, Linyi University, Linyi 276000, China;
    3. College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271018, China
  • Received:2019-09-18 Online:2020-04-20 Published:2020-04-17

Abstract: To investigate the effects of zinc methionine instead of zinc sulfate on growth performance,meat quality and antioxidant status of broilers,200 one-day-old healthy male Arbor Acres (AA) broiler chicks with similar body weight (BW) were randomly allocated into 2 treatments with 5 replicates of 20 broilers per replicate in a completely randomized design.Broiler chickens in both treatments were fed a basal diet and the level of zinc was set at 40 mg/kg.In the treatment one,zinc was added in the form of zinc sulfate,and in the treatment two,zinc was added in the form of zinc methionine.The experiment lasted for 42 days.Results showed as follows:① Compared with zinc sulfate,zinc methionine significantly reduced the feed conversion rate of broilers in the grower phase or the entire period of the experiment (P<0.05),but did not affect the average daily feed intake,average daily gain,body weight at both 21 and 42 days of age of broilers (P>0.05).② Compared with zinc sulfate,zinc methionine significantly reduced the percentage of eviscerated yield (P<0.05),increased the breast muscle weight,abdominal fat weight and percentage of abdominal fat (P<0.05),but did not affect the slaughter weight,dressed weight,eviscerated weight,leg muscle weight,carcass yield,proportion of breast and thigh at 42 days of age (P>0.05).③ No significant differences were found in meat color,drip losses and boiling losses of breast muscle between zinc methionine and zinc sulfate treatments (P>0.05).④ Compared with zinc sulfate,zinc methionine significantly increased CuZn-superoxide dismutase (CuZn-SOD) activity in the serum at both 21 and 42 days of age and total antioxidant capacity (T-AOC) in the serum at 42 days of age (P<0.05),reduced malondialdehyde (MDA)concentration in the serum at 21 days of age (P<0.05),but did not affect the glutathion peroxidase (GSH-Px) activity (P>0.05).In conclusion,zinc methionine instead of zinc sulfate could positively affect growth performance and antioxidant status of broilers.

Key words: zinc methionine; broiler; growth performance; meat quality; antioxidant status

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