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Effects of Nutrient Specifications and Xylanase Plus Phytase Supplementation of Wheat-based Diets on Growth Performance and Carcass Traits of Broiler Chicks
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Effects of Nutrient Specifications and Xylanase Plus Phytase Supplementation of Wheat-based Diets on Growth Performance and Carcass Traits of Broiler Chicks
Selle, P.H.; Huang, K.H.; Muir, W.I.;
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The simultaneous addition of xylanase (5,600 EXU/kg) and phytase (500 FTU/kg) feed enzymes to wheat-based broiler diets was investigated. Starter, grower and finisher diets, with three tiers of nutrient specifications, were fed to 1,440 broiler chicks kept on deep litter from 1-42 days post-hatch, without and with xylanase plus phytase, to determine the effects of diet type and enzyme supplementation on growth performance. The nutrient specifications of type A diets were standard; energy density and protein/amino acid levels were reduced on a least-cost basis to formulate type B diets and further reduced to type C diets. Phosphorus (P) and calcium (Ca) levels were adjusted in supplemented diets. From 1-42 days post-hatch, diet type significantly influenced growth performance. Birds on type C diets had lower growth rates (2,429 vs. 2,631 g/bird; p<0.001), higher feed intakes (4,753 vs. 4,534 g/bird; p<0.005) and less efficient feed conversion (1.96 vs. 1.72; p<0.001) than birds offered type A diets. Enzyme supplementation increased growth rates by 3.2% (2,580 vs. 2,501 g/bird; p<0.005) and improved feed efficiency by 2.7% (1.80 vs. 1.85; p<0.05) over the entire feeding period. There were no interactions between diet type and enzyme supplementation. At 21 days, 5 out of 30 birds per pen were transferred to cages to ascertain treatment effect on apparent metabolisable energy (AME) and nitrogen (N) retention. Xylanase plus phytase enhanced AME (13.48 to 13.91 MJ/kg DM; p<0.001) and N retention (56.3 to 59.7%; p<0.005). Carcass and breast weights of the caged birds were determined following commercial processing. Diet type significantly influenced breast weight, carcass weight and yield. Birds offered Type A diets, in comparison to Type C diets, supported heavier breast (467 vs. 424 g; p<0.001) and carcass weights (1,868 vs. 1,699 g; p<0.001) with superior carcass yields (71.8 vs. 70.6%; p<0.005). Enzyme addition increased carcass weight by 3.9% (1,752 vs. 1,821 g; p<0.005) and breast weight by 5.8% (431 vs. 456 g; p<0.01) without influencing yields. Feed ingredient costs per kg live weight gain and per kg carcass weight indicated that enzyme addition was economically feasible, where supplementation of Type A diets generated the most effective results. Importantly, soluble and total non-starch polysaccharide and phytate contents of the wheat used were typical by local standards. This study confirms the potential of supplementing wheat-based broiler diets with xylanase plus phytase but further investigations are required to define the most appropriate inclusion rates and dietary nutrient specifications in this context.
Phytase;Xylanase;Growth Performance;Carcass Traits;Broiler Chicks;
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Angkanaporn, K., M. Choct, W. L. Bryden and E. F Annison. 1994. Effects of wheat pentosans on endogenous amino acid losses in chickens. J. Sci. Food Agric. 66:399-404.

Annison, G. 1991. Relationship between the levels of soluble nonstarch polysaccharides and the apparent metabolizable energy of wheats assayed in broiler chickens. J. Agric. Food Chem. 39:1252-1256.

Bedford, M. R. 1995. Mechanism of action and potential environmental benefits from the use of feed enzymes. Anim. Feed Sci. Technol. 53:145-155. crossref(new window)

Bedford, M. R. and H. Schulze. 1998. Exogenous enzymes of pigs and poultry. Nutr. Res. Rev.11:91-114.

Choct, M. 1998. The effect of different xylanases on carbohydrate digestion and viscosity along the intestinal tract in broilers. In: Proc. Aust. Poult. Sci. Symp. Vol. 10:111-115.

Choct, M., R. J. Hughes and G. Annison. 1999. Apparent metabolisable energy and chemical composition of Australian wheat in relation to environmental factors. Aust. J. Agric. Res. 50:447-451.

Engelen, A. J., F. C. van der Heeft, P. H. G. Randsdorp and E. L. C. Smit. 1994. Simple and rapid determination of phytase activity. J. AOAC Int.

Huang, K., P. H. Selle, X. Li, R. J. Gill, W. I. Muir and W. L. Bryden. 2003. Phytase plus xylanase dose titration and broiler performance on wheat-based diets. In: Proc. Aust. Poult. Sci. Symp. Vol. 15:113.

Jacob, J. P., S. Ibrahim, R. Blair, H. Namkung and I. K. Paik. 2000. Using enzyme supplemented, reduced protein diets to decrease nitrogen and phosphorus excretion of broilers. Asian-Aust. J. Anim. Sci. 11:1561-1567.

Lenis, N. P. and A. W. Jongbloed. 1999. New technologies in low pollution swine diets: diet manipulation and use of synthetic acids, phytase an phase feeding for reduction of nitrogen and phosphorus excretion and ammonia emission -Review. Asian-Aust. J. Anim. Sci. 12:305-327.

Marquardt, R. R., A. Brenes, Z. Zhang and D. Boros. 1996. The use of enzymes to improve nutrient availability in poultry feedstuffs. Anim. Feed Sci. Technol. 60:321-330.

Miller, G. A., V. L. Youngs and E. L. Oplinger. 1980. Environmental and cultivar effects on oat phytic acid concentration. Cereal Chem. 57:189-191.

Mollah, Y., W. L. Bryden, I. R. Wallis, D. Balnave and E. F. Annison. 1983. Studies of low metabolisable energy wheats for poultry using conventional and rapid assay procedures and the effects of feed processing. Br. Poult. Sci. 24:81-89.

Parkkonen, T., A. Tervila-Wilo, M. Hopeakoski-Nurminen, A. Morgan, K. Poutanen and K. Autio. 1997. Changes in wheat microstructure following in vitro digestion. Acta Agric. Scand., Sect. B, Soil and Plant Sci. 47:43-47.

Peng, Y. L., Y. M. Guo and J. M. Yuam. 2003. Effects of phytase replacing partial inorganic phosphorus supplementation and xylanase on the growth performance and nutrient digestibility in broilers fed wheat-based diets. Asian-Aust. J. Anim. Sci. 16:239-247.

Ravindran, V. 1995. Phytases in poultry nutrition. An overview. In: Proc. Aust. Poult. Sci. Symp. Vol. 7:135-139.

Ravindran, V., W. L. Bryden and E. T. Kornegay. 1985. Phytates: occurrence, bioavailability and implications in poultry nutrition. Poult. Avian Biol. Rev. 6:125-143.

Ravindran, V., P. H. Selle and W. L. Bryden. 1999. Effects of phytase supplementation, individually and in combination, with glycanase on the nutritive value of wheat and barley. Poult. Sci. 78:1588-1595.

Ravindran, V., P. H. Selle, G. Ravindran, P. C. H. Morel, A. K. Kies and W. L. Bryden. 2001. Microbial phytase improves performance, apparent metabolizable energy and ileal amino acid digestibility of broilers fed a lysine-deficient diet. Poult. Sci. 80:338-344.

Schwarz, G., F-J. Schoner, H. Weiske and P. P. Hoppe. 1994. Evaluation of a possible interaction between microbial phytase and two carbohydrase preparations in broilers. In: Proc. Soc. Nutr. Physiol. 2:47.

Simbaya, J., B. A. Slominski, W. Guenter, A. Morgan and L. D. Campbell. 1996. The effects of protease and carbohydrase on the nutritive value of canola meal for poultry: In vitro and in vivo studies. Anim. Feed Sci. Technol. 61:219-234.

Selle, P. H., V. Ravindran, R. A. Caldwell and W. L. Bryden. 2000. Phytate and phytase: consequences for protein utilisation. Nut. Res. Rev. 13:255-278.

Selle, P. H., V. Ravindran, P. H. Pittolo and W. L. Bryden. 1999. An evaluation of microbial phytase in sorghum-based broiler diets. In: Proc. Aust. Poult. Sci. Symp. Vol. 11:97-100.

Selle, P. H., V. Ravindran, P. H. Pittolo, R. J. Gill and W. L. Bryden. 2002. Xylanase plus phytase supplementation of broiler diets based on different wheats. In: Proc. Aust. Poult. Sci. Symp. Vol. 14:141-144.

Selle, P. H., P. H. Pittolo, B. Wells, R. J. Gill and W. I. Muir. 2003a. Effects of exogenous xylanases on growth performance of broilers offered steam-pelleted diets from 1-40 days post-hatch. In: Proc. Aust. Poult. Sci. Symp. Vol. 15: 99-102.

Selle, P. H., V. Ravindran, G. Ravindran, P. H. Pittolo and W. L. Bryden. 2003b. Influence of phytase and xylanase supplementation on growth performance and nutrient utilisation of broilers offered wheat-based diets. Asian-Aust. J. Anim. Sci. 16:394-402.

Selle, P. H., A. R. Walker and W. L. Bryden. 2003c. Total and phytate-phosphorus contents and phytase activity of Australian-sourced feed ingredients for pigs and poultry. Aust. J. Exp. Agric. 43:475-479.

Silversides, F. G. and M. R. Bedford. 1999. Enzymes may improve energy, protein digestibility. Feedstuffs 71(9):15-17.

Simons, P. C. M., H. A. J. Versteegh, A. W. Jongbloed, P. A. Kemme, P. Slump, K. D. Bos, M. G. E. Wolters, R. F. Beudeker and G. J. Verschoor. 1990. Improvement of phosphorus availability by microbial phytase in broilers and pigs. Br. J. Nutr. 64:525-540.

Zyla, K., D. Gogol, J. Koreleski, S. Swiatkiewicz and D. R. Ledoux. 1999. Simultaneous application of phytase and xylanase to broiler feeds based on wheat: feeding experiments with growing broilers. J. Sci. Food Agric. 79:1841-1848.