Effects of dietary nanocrystalline cellulose supplementation on growth performance,carcass traits,intestinal development and lipid metabolism of meat ducks

The influence of nanocrystalline cellulose(NCC) supplementation on growth performance, carcass traits,intestinal development, and lipid metabolism was assessed in 600 one-day-old male meat ducks(Cherry Valley ducks) from 1 to 35 d of age. Diets were supplemented with 0,200,500,800 and 1,500 mg/kg NCC during both the starter(1-14 d) and grower(15-35 d) phases. Each dietary treatment consisted of 8 replicate cages of 15 birds. Supplementation of NCC was associated with dose dependent increases in BW gain and feed intake(P < 0.01) during 1-14 d of age and in BW at 35 d of age. As NCC content increased,the percentage of breast meat weight(P < 0.05) and leg(with bone) weight(P < 0.05) linearly increased,while the percentage of abdominal fat weight(P < 0.01) linearly decre.ased in ducks at 35 d of age.Supplementation of NCC resulted in a dose-dependent increase in the weight(P < 0.05) and density(P < 0.01) of the cecum. The percentage of total hepatic lipid content(P < 0.01) at 14 d of age and serum triglyceride(TG) concentration(P = 0.052) at 35 d of age linearly decreased with increasing of dietary NCC addition. In conclusion, inclusion of 1,500 mg/kg NCC in feed resulted in the greatest improvements in duck performance, intestinal development and lipid deposition.