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Nutrient Status of Scavengable Feed Resources in Crop and Gizzard Contents of Three Genotypes of Ducklings

M M Rahman
Department of Livestock Services, Rajshahi

M J Khan
Abstract Department of Animal Nutrition, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

M A Akbar
Department of Animal Nutrition, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Abstract/ Executive Summary:

An investigation was carried out with 54 scavenging ducklings of three genotypes belonging to three age groups (6, 10 and 14 weeks) taking from 3 areas reared under two feeding regimes. The birds were sacrificed from farmer’s house between 4.0 and 5.0 P.M. They were dissected to identify crop and gizzard contents (CGC). Cereal grains, bran, green forages, insects and worms were the main CGC and their composition varied significantly (p<0.01) with genotypes and feed. CGC were collected for chemical analysis. The CGC was processed and analyzed for proximate components, calcium (Ca) and total phosphorus (TP). It contained 88.06% DM, 10.15% CP, 13.65% CF, 2.89% EE, 15.51% Ash, 57.80% NFE, 1.42% Ca, 0.40% TP and 2264 kcal/kg DM TME. Genotypes and feed had significant effect (p<0.01) on CP, CF, EE, Ash, Ca and TP at 6 weeks of age but genotypes and feed showed no significant variations (p>0.05) on TME for the same period. It may be concluded that the scavenging feeds are deficient in CP, Ca and TP but excess in crude fibre. So, the concentration of the nutrients (except CF and ash) available to the scavenging ducklings under rural condition may be treated as below the suggested nutrient requirements for ducklings.

Keywords: Chemical composition, Duckling, Feed supplementation, Coastal areas

Location: Noakhali district, Bangladesh

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Feed

Objectives:

To collect information about the availability of feed resources of ducklings and
To determine the physical and chemical composition of feeds available in crop and gizzard of ducklings reared under scavenging condition in Noakhali district of Bangladesh.

Methodology:

The experiment was conducted at three villages of Noakhali district in Bangladesh for a period of 98 days. Day-old ducklings of three genotypes viz. Muscovy, Pekin and Desi white were collected from Central Duck Breeding Farm, Narayangonj and assigned at random in a 2 (feeding regimes) × 3 (genotypes) factorial experiment in a Randomized Block Design having 3 replicates in each treatment. The birds of control group received feed only from scavenging and the birds of supplementary group received mash feed in addition to normal scavenging. The experimental birds were allowed to scavenged freely in the agricultural fields, ponds and ditches nearer to farmer’s house from 8.00 to 16.00 hours daily. In addition to scavenging feed, the birds belonging to supplementary group received a concentrate mixture composed of 50% rice polish, 30% broken rice and 20% wheat bran in the from of wet mash. Supplementary feeds were given @ 10g in the first week which was further increased @ 10g in each week until 8 weeks. The supplemental feeds were divided into two equal portions and were given twice daily. The present investigation involved the identification of physical composition of crop and gizzard contents (CGC) and the determination of chemical composition of CGC of scavengable ducklings in coastal areas of Bangladesh. Sampling was done three times during the experimental period. The first time at 6 weeks of age, the second time at 10 weeks of age and the third time at 14 weeks of age. Ducklings were slaughtered at 6, 10 and 14 weeks of age to study the physical and chemical composition of CGC of scavengable ducklings. At each time, 3 birds from each genotype were randomly slaughtered at 2, 4 and 6 hours of scavenging following ‘halal’ method by severing the jugular vein and allowed to bleed completely Singh et al. (2003). A total of 54 ducklings were randomly collected from different villages of the study area for collecting CGC. The number of ducklings and their plan for slaughtering are summarized in Table 1. The ducklings were confined in farmers house between 4.0 and 5.0 P.M. Eighteen birds were caught during each sampling time and slaughtered on the spot by bleeding at the cervical region. The carcass of the birds were opened and full crop and gizzard contents were taken and weighed. Thereafter, the crop and gizzard of the individual birds were identified visually and weighed. All samples were kept in a freezer for chemical analysis. They were brought to Animal Nutrition Laboratory, BAU, Mymensingh and then dried in an oven at 60ºC and weighed after drying. The dried CGC were ground with the help of a grinding machine. The true metaboligable energy (TME) of CGC was determined by an indirect method using the formula of Wiseman (1987). According to Wiseman, TME = 3951+54.4 EE – 88.7 CF – 40.8 Ash; where, EE = % of ether extract, CF = % of crude fiber, Ash = % of ash. The statistical analyses of the data on different parameters were performed by the analysis of variance corresponding to a 2 (Feeding regimes) × 3 (Genotypes) factorial experiment in a Randomized Block Design (Steel and Torrie, 1980) using a MSTAT-C statistical package program.

Source of Information: Bang. J. Anim. Sci. 2014. Vol. 43, No.3: 185-191, ISSN 0003-3588

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The major nutrients (CP, Ca, TP and TME) in crop and gizzard contents appeared to be very low to support satisfactory production potential. It can also be concluded that the nutritional status of scavenging ducklings under rural management condition was below the requirements. The information obtained in the present study would be a basis for formulating nutrient supplementation policies for scavenging ducklings using the locally available feed resources. However, genotypes, feed, climate, season and age of birds should be given utmost importance to deal with nutritional status of scavenging ducklings in coastal areas of Bangladesh.

Knowledge Management: Journal