Swine and Poultry Nutrition

Amounts of Force-Feeding Affect Growth Performance, Serum Biochemical Parameters and Liver Histology of Pekin Ducks

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  • State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China

Received date: 2011-08-23

  Online published: 2012-01-13

Abstract

This experiment was conducted to determine the effects of different force-feeding amounts on growth performance, serum biochemical parameters and liver histology of Pekin ducks. Ninety-six 35-day-old healthy male Pekin ducks with similar body weight were randomly assigned into 8 groups with 6 replicates per group and 2 Pekin ducks per replicate. The experimental feeding period lasted for 7 d from 35 to 42 days of age and the corn-soybean diets were provided to ducks in the 8 groups. The control group was fed ad libitum with average daily intake of (259.55±18.59) g and the other groups were fed by force-feeding. The feed intake of seven force-feeding groups in the first 2 days was the same which was 260 g/bird at 35 days of age and 300 g/bird at 36 days of age, and then the amount of feed provided to the ducks in each group remained unchanging during the other 5 days which was 300, 330, 360, 390, 420, 450 and 480 g/d for a bird, respectively. The results showed as follows: 1) the final average body weight and average daily gain (ADG) were significantly higher in the force-feeding groups except for 300 g/d force-feeding group than those in the control group (P<0.05). The final average body weight and ADG were increased with the increasing of force-feeding amount, and when the amount was above 420 g/d, there was no significant difference (P>0.05). The feed/gain (F/G) was no significantly different between each force-feeding group and the control group (P>0.05). Based on the broken-line regression model analysis with ADG data, the optimum force-feeding amount for Pekin ducks was 414.2 g/d. 2) No significant differences in serum glucose (Glu) concentration, glutamate oxaloacetate transaminase (GOT) activity were observed among groups (P>0.05). Serum γ-glutamyltransferase (GGT) activity was significantly higher in 450 g/d force-feeding group than that in the control group, while there was no significant difference between the other force-feeding groups and the control group (P>0.05). Serum triglycerides (TG), cholesterol (CHO) concentration and glutamate pyruvate transaminase (GPT) activity were significantly increased with the increasing of force-feeding amount (P<0.05). Histology observation showed that the swelling of hepatocyte was observed and the cytoplasm was full of fat in several force-feeding groups compared to the control group. In conclusion, force-feeding to Pekin ducks can induce a strong fat deposition in liver tissue, but the growth performance is changeless when the feeding level is above 420 g/d.

Cite this article

WEN Zhiguo, HOU Shuisheng, XIE Ming, HUANG Wei, YU Junying . Amounts of Force-Feeding Affect Growth Performance, Serum Biochemical Parameters and Liver Histology of Pekin Ducks[J]. Chinese Journal of Animal Nutrition, 2012 , 24(1) : 69 -77 . DOI: 10.3969/j.issn.1006-267x.2012.01.011

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