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Performance of Broiler on Phytase Supplemented Soybean Meal Based Diet

F. Ahmed
Youth Training Center, Khagrapur, Khagrasori, Bangladesh.

M.S. Rahman
Department of Poultry Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.

S.U. Ahmed
Department of Poultry Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.

M.Y. Miah
Department of Poultry and Dairy Science, SGVC, Sylhet, Bangladesh.

Abstract/ Executive Summary:

An investigation was made on the performance of 144 unsexed Van Cobb broiler chicks from 21 days to 42 days of age. The chicks were fed on soybean meal (SM) based iso-nitrogenous and iso-energetic diet incorporating phytase with the levels of 0.0, 0.50, 1.00 and 1.50 g/kg diet for better utilization of the basal diet. The grow th rate, feed intake, feed consumption, dressing yield and profitability increased as the level of phytase supplementation increased and the level of phytase had no effect on survivability. The addition of phytase seemed to be effective to overcome the antinutritive effect of phytate phosphorus and non-starch polysaccharides (NSP) on broiler performance. Therefore, it was concluded that 1.50 g/kg phytase may be incorporated in SM based broiler diet for profitable production.

Keywords: Phytase, Broiler, Growth rate, Feed intake, Feed conversion and dressing yield

Location: Bangladesh Agricultural University Poultry Farm, Mymensingh

Start Date: 00-01-2003

End Date: 00-02-2003

Program Area: Animal Health and Management

Commodity: Feed

Objectives:

To study the performance of broilers feed on SM based diet fortified with phytase.

Methodology:

The experiment was conducted at Bangladesh Agricultural University Poultry Farm, Mymensingh with 21 days old broilers (Van Cobb) for a period of 21 days from mid January to mid February, 2003. The research was carried out to investigate the effect of the supplementing phytase in the soybean mea based diet on body weight, feed consumption, feed efficiency, mortality, dressing percentage and cost of broiler production. A total of 144 experimental birds were equally assigned to four dietary treatments (D₁, D₂, D₃ and D₄) and each of 3 replications (R₁, R₂, and R₃) with 12 birds in each. The experimental birds were randomly distributed according to treatments and replications. The experimental birds of all treatment groups were reared on littered floor with 1000 cm² floor space and feed and water were supplied ad libitum to the birds throughout the experimental period. Initial body weight and amount of feed supply were recorded at the beginning of the experiment. Feed intake, feed supply and body weight s were recorded every week. At 43 days of age, one male and one female broiler from each replicate group weighing average of pen weight were selected for processing ready to cook meat. Final processing performed by removal of the head, shank, elementary tract, oil gland, kidneys, lungs, heart, liver and gall bladder. The collected and calculated growth performance and cost-retum data were statistically analyzed using analysis of variance (ANOVA) technique with the principles of Completely Randomized Desigh. The dressing yield parameters were analyzed by using a 2 (Sex) x 4 (diets) factorial experiment in a CRD. The variances were partitioned into sex (S), Diet (D) SxD and error. Least Significance Difference of all data were calculated to compare variation among treatments where ANOVA showed significant differences among means.

Source of Information: International Journal of Poultry Science 3 (4): 266-271, 2004

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering the above facts and findings, it may be concluded that addition of phytase enzyme improved live weight, feed utilization, and dressing yield. Supplementation of 1.50g phytase per kg SM based diet gave the best result indicating a suitable level of phytase supplementation to SM based diet to obtain beneficial effect on overall performance of broiler. a) Phytin phosphorus, which is the major anti-nutritional factor, can be inactivated efficiently by supplementation of phytase. This influence d efficient feed utilization and rapid growth of broilers. b) Supplementation of 1.50g phytase per kg SM based diet (25% SM in ration) is most effective on profitable broiler rearing. c) Based on the findings of the present study, it may be worthwhile to investigate further whether or not a higher level of SM above 25% fortified with phytase enzyme may be useful to obtain beneficial effect. However, as the increased use of 25% soybean meal in diet fortified with 1.50 g/kg phytase gave best performance of broiler meat production, it may be worthwhile to investigate further whether a higher level above 25% might produce improved or similar growth leading to a further increase in profitability.

Knowledge Management: Journal