Effect of Early Feed Restriction of Varied Severity on Growth Performance, Carcass Composition and Lipid Metabolism in Female Ducks

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概要

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• This experiment was carried out using female ducks to determine the effect of feed restriction at early stage of growth of varied severity on subsequent growth performance, carcass composition and lipid metabolism. Seventy-two meat-type female ducks (White Peking) were assigned to four treatments at 7 days of age: ad libitum feeding (control) and three treatments, in which daily feed intake were designed to restrict to 80, 60 and 40% of ad libitum intake, respectively from 8 to 14 days of age. All the birds were fed ad libitum following feed restriction until 47 days of age. A commercial starter diet for broilers (2, 900 kcal ME/kg of diet, 23% CP) was supplied to all the birds from 1 to 21 days of age followed by a finisher diet for broilers (3, 200kcal ME/kg of diet, 19% CP) up to 47 days of age. Six ducks from each group were killed at 14 days of age and the remainders were sacrificed at the final day of experiment. The growth rate was significantly lowered by feed restriction but it was completely recovered irrespective of the severity of restriction until the experiment terminated. Weights of muscle and abdominal fat pad were also decreased by the feed restriction at 14 days of age. However, there were no differences between control and feed-restricted groups when the experiment terminated at 47 days of age. Visceral weights and carcass composition were measured only at 47 days of age and no effect of feed-restriction was observed. Lipid metabolism was also significantly affected by the feed restriction at 14 days of age as evidenced by decreases in contents of triglyceride and phospholipid in the liver and serum and activities of liver acetyl-CoA carboxylase and fatty acid synthetase while these effects were not observed in the birds killed at 47 days of age.

• 社団法人 日本畜産学会の論文

著者

• Ohtani Shigeru

  Faculty Of Agriculture Gifu University

• Tanaka Kei-ichi

  Graduate School Of Agriculture Hokkaido University

• TAN Ben-he

  The United Graduate School of Agricultural Science, Gifu University

• Tanaka Kei-ichi

  Graduate School of Agriculture, Hokkaido University

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