Research Article
Volume 5 Issue 6 - 2020
Nutrient Concentrations of Gizzard Contents of Scavenging Ducks in Haor Areas of Sylhet
Mohammad Mehedi Hasan Khan1*, Jahanara Khanom Joty1, Mohammad Yousuf Miah2, Jamil Ahmed1 and Mst Yeasmin Akther1
1Department of Biochemistry and Chemistry, Faculty of Biotechnology and Genetic Engineering, Sylhet Agricultural University, Sylhet, Bangladesh
2Department of Poultry Science, Faculty of Veterinary, Animal and Biomedical Sciences, Sylhet Agricultural University, Sylhet, Bangladesh
*Corresponding Author: Mohammad Mehedi Hasan Khan, Professor and Chairman, Department of Biochemistry and Chemistry, Faculty of Biotechnology and Genetic Engineering, Sylhet Agricultural University, Sylhet, Bangladesh.
Received: April 24, 2020; Published: May 18, 2020



An investigation was carried out with 16 ducks belonging to two age groups (14 weeks and 1.5 years) taking from haor areas of Sylhet regions reared under three feeding regimes. Ten layers were collected from Sunamganj on December and six growers were collected from Jaintiapur, Sylhet on July. The birds were divided into three dietary treatments. Diets for comparison were: T1 (no feed supplement), T2 (25g feed supplement per day and scavenging), T3 (50g feed supplement per day and scavenging). The birds were sacrificed from farmer’s house between 4.0 and 5.0 P.M. They were dissected to assess chemical composition of gizzard contents. Gizzard contents were collected and processed for proximate components. The average fresh weight of gizzard contents were 14.33 ± 3.68g, 21.83 ± 7.79g, 23 ± 0.82g for ducks receiving scavenging, 25g feed supplement and 50g feed supplement respectively. Gizzard contents contained 54.84 ± 6.37% DM, 53.245 ± 4.92% Ash, 1.39 ± 0.35% EE and 2.39 ± 0.41% CP for scavenging, 57.59 ± 6.29% DM, 47.71 ± 6.04% Ash, 2.45 ± 0.42% EE and 4.34 ± 1.05% CP for 25g supplementary feed with scavenging and 54.52 ± 2.53% DM, 46.76 ± 3.92% Ash, 3.93 ± 0.49% EE and 6.42 ± 1.09% CP for 50g supplementary feed with scavenging. CP and Ash contents were varied significantly (P < 0.01) with season, but contents of EE, DM were not influenced by season. During rainy season the crude protein and ash contents were higher than winter season. Crude protein was 5.55 ± 2.24% during rainy season and 3.87 ± 1.43% in winter season. Ash contents were 50.37 ± 3.09% and 47.33 ± 3.39% during rainy and winter season respectively. The number of bacteria of the gizzard content was around 103 - 106/ml. The bacterial population was 1.2 × 104/ml - 1.28 × 106/ml when ducks were scavenging, 1.1 × 104/ml - 1.8 × 104/ml and 7.2 × 103/ml - 1.8 × 104/ml when ducks receiving 25g and 50g supplementary diet respectively. It can be concluded that only scavenging is not enough for ducks and should be supplied at least 50g of supplemented feed. In future cost benefit analysis should be carried out.

Keywords: Ether Extract; Dry Matter; Crude Protein; Ash Content; Gizzard; Feed Supplement


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Citation: Mohammad Mehedi Hasan Khan., et al. “Nutrient Concentrations of Gizzard Contents of Scavenging Ducks in Haor Areas of Sylhet”. EC Veterinary Science 5.6 (2020): 04-11.

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