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• Abdel-Fattah SA, El-Sanhoury MH, El-mednay NM, Abdel- Azeem F, 2008. Thyroid activity, some blood constituents, organs morphology and performance of broiler chicks fed supplemental organic acids. Int J Poult Sci, 7, 215-222.
• Enzymes and organic acid in broiler Acamovic T, 2001. Commercial application of enzyme tech- nology for poultry production. World Poult Sci J, 57, 225- 243.
• Ademark P, Larsson M, Tjerneld F, Stalbrand H, 2001. Mul- tiple α-galactosidases from Aspergillus niger: Purificati- on, characterization and substrate specifications. Enzyme Microb Technol, 29, 441-448.
• Annison G, Choct M, 1991. Anti-nutritive activities of cereal non-starch polysaccharides in broiler diets and strategies minimizing their effects. World Poult Sci J, 47, 232-242.
• Ao T, Cantor AH, Pescatore AJ, Ford MJ, Pierce JL, Dawson KA, 2009. Effect of enzyme supplementation and acidification of diets on nutrient digestibility and growth performance of broiler chicks. Poult Sci, 88, 111-117.
• AOAC (2000). Official Methods of Analysis, 17th edition, AOAC International Maryland, USA, 4, 1-41.
• Balamurugan R, Chandrasekaran D, 2010. Effect of multienz- yme supplementation on weight gain, feed intake, feed ef- ficiency and blood glucose in broiler chickens. Indian J Sci Technol, 3, 193-195.
• Barrett AJ, Rawlings ND, Woessner JF, 2003. The Handbook of Proteolytic Enzymes, 2nd edition, Academic Press, Camb- ridge, UK, pp: 3349-3351.
• Bedford MR, 2000. Exogenous enzymes in monogastric nut- rition-their current value and future benefits. Anim. Feed Sci Technol, 86, 1-13.
• Bedford MR, Morgan AJ, 1996. The use of enzymes in poultry diets. World’s Poult Sci J, 52, 61-68.
• Bolton W, Dewar WA, 1964. The digestibility of acetic, propi- onic and butyric acids by the fowl. Br Poult Sci, 6, 103-105.
• Brown DR, Southern LL, 1985. Effect of citric and ascorbic acids on performance and intestinal pH of chicks. Poult Sci, 64, 1399-1401.
• Broz J, Ward JA, 2007. The role of vitamins and feed enzymes in combating metabolic challenges and disorders. J Appl Poult Res, 16, 150-159.
• Cave NAG, 1984. Effect of dietary propionic and lactic acids on feed intake by chicks. Poult Sci, 63, 131-134.
• Choct M, Hughes RJ, Wang J, Bedford MR, Morgan AJ, Annison G, 1996. Increased small intestinal fermentation is partly responsible for the anti-nutritive activity of non-starch polysaccharides in chickens. Br Poult Sci, 37, 609-621.
• Costa FGP, Goulart CC, Figueiredo DF, Oliveira CSF, Silva JHV, 2008. Economic and environmental impact of using exo- genous enzymes on poultry feeding. Int J Poult Sci, 7, 311- 314.
• Dashek WV, 1997. Methods in Plant Biochemistry and Mole- cular Biology, CRC press, San Diego, USA, p: 313.
• Dibner, JJ, Buttin P, 2002. Use of organic acids as a model to study the impact of gut microflora on nutrition and meta- bolism. J Appl Poult Res, 11, 453-463.
• Gao FY, Jiang Zhou GH, Han ZK, 2007. The effects of xylanase supplementation on performance, characteristics of the gastrointestinal tract, blood parameters and gut microfe- lora in broilers fed on wheat-based diets. Anim Feed Sci Technol, 142, 173-184.
• Rahman et al Ghazi JA, Srooke, Galbraith H, Bedford MR, 2002. The potenti- al for the improvement of the nutritive value of soya-bean meal by different proteases in broiler chicks and broiler cockerels. Br Poult Sci, 43, 70-77.
• Giesting, DW, Easter RA, 1985. Response of starter pigs to supplementation of corn-soybean meal diets with organic acids. J Anim Sci, 60, 1288-1294.
• Giraldo LA, Tejido ML, Ranilla MJ, Ramos S, Carro MD, 2008. Influence of direct-fed fibrolytic enzymes on diet digestibi- lity and ruminal activity in sheep fed grass hay-based diet. J Anim Sci, 86, 1617-1623.
• Graham KK, Kerley MS, Firman JD, Allee GL, 2002. The effect of enzyme treatment of soybean meal on oligosaccharide disappearance and chick growth performance. Poult Sci, 81, 1014-1019.
• Gutierrez Del Alamo A, Verstegen MWA, Den Hartog LA, Pe- rez De Ayala P, Villamide MJ, 2008. Effect of wheat cultivar and enzyme addition to broiler chicken diets on nutrient digestibility, performance and apparent metabolizable energy content. Poult Sci, 87, 759-767.
• Hajati H, 2010. Effects of enzyme supplementation on per- formance, carcass characteristics, carcass composition and some blood parameters of broiler chicken. Am J Anim Vet Sci, 5, 221-227.
• Henry PR, Ammerman CB, Campbell DR, Miles RD, 1987. Effect of antibiotics on tissue trace mineral concentration and intestinal tract weight of broiler chicks. Poult Sci, 66, 1014-1018.
• Hernandez F, Garcia V, Madrid J, Orengo J, Catala P, Megias MD, 2006. Effect of formic acid on performance, digesti- bility, intestinal histomorphology and plasma metabolite levels of broiler chickens. Br Poult Sci, 47, 50-56.
• Hume ME, Corrier DE, IVIE GW, Deloach JR, 1993. Metabo- lism of [14C] propionic acid in broiler chicks. Poult Sci, 72, 786-793.
• Irish GG, Barbour GW, Classen HL, Tyler RT, Bedford MR, 1995. Removal of the galactosides of source from soybean meal using either ethanol extraction or exogenous galac- tosides and broiler performance. Poult Sci, 74, 1484-1494.
• Jaroni D, Scheideler SE, BECK M, Wyatt C, 1999. The effect of dietary wheat middlings and enzyme supplementati- on. 1. Late egg production efficiency, egg yields, and egg composition in two strains of Leghorn hens. Poult Sci, 78, 841-847.
• Kavitha Rani B, Jayashree Desai, Deepika Reddy, Radhakrish- na PM, 2003. Effect of supplementation of enzymes for non starch polysaccharides in corn-soya diet in broilers. Indian J Anim Nutr, 20, 63-69.
• Kocher A, CHOCT M, Porter MD, Broz J, 2002. Effects of feed enzymes on nutritive value of soyabean meal fed to broi- lers. Br Poult Sci, 43, 54-63.
• Lazaro RM, Garcia P, MEDEL, Mateos GG, 2003. Influence of enzymes on performance and digestive parameters of bro- ilers fed rye-based diets. Poult Sci, 82, 132-140.
• Leeson S, Summers JD, 2005. Commercial Poultry Nutrition, 3rd edition, University Books, Guelph, Canada, p: 80. National Research Council, 1994. Nutrient Requirements of Enzymes and organic acid in broiler Poultry. 9th revised edition, National Academy Press, Was- hington, USA, pp: 45.
• Olukosi OA, Cowieson Aj, Adeola O, 2007. Age-related inf- luence of a cocktail of xylanase, amylase, and protease or phytase individually or in combination in broilers. Poult Sci, 86, 77-86.
• Owens B, Tucker L, Collins MA, McCracken KJ, 2008. Effects of different feed additives alone or in combination on bro- iler performance, gut micro flora and ileal histology. Br Po- ult Sci, 49, 202-212.
• Paul SK, Samanta G, Halder G, Biswas P, 2007. Effect of com- bination of organic acid salts as antibiotic replacer on the performance and gut health of broiler chickens. Livest Res Rural Dev, 19, 11-16.
• Ravindran V, Cyril HW, 1995. Utilization of non-conventional feed resources in poultry production : Results of on-farm trials. Asian-Aust J Anim Sci, 8(4), 387-392.
• Schang MJ, Azcona JO, Arias JE, 1997. Effects of a soya enz- yme supplement on performance of broilers fed corn/ soy or corn/soy/full-fat soy diets. Poult Sci, 76, 132.
• Sheikh Adil, Tufail Banday, Gulam Ahmad Bhat, Masood Sale- em, Mir Manzoor Rehman, 2010. Effect of dietary supple- mentation of organic acids on performance, intestinal his- tomorphology, and serum biochemistry of broiler chicken. Vet Med Int, 479-485.
• Sikka SS, Chawla JS, 2002. Influence of enzyme supplementa- tion of wheat and rice kani based diets on the performance of broilers. Anim Nutri Feed Tech, 2, 11-18.
• Singh PK, Khatta VK, 2003. Effect of phytase supplementati- on on the performance of broiler chickens fed wheat based diets. Indian J Anim Nutr, 201, 57-62.
• Rahman et al Skinner JT, Izat AL, Waldroup PW, 1991. Research note: Fu- maric acid enhances performance of broiler chickens. Po- ult Sci, 70, 1444-1447.
• Steel RGD, Torrie JH, Dickey DA, 1997. Principles and pro- cedures of statistics: A biometrial approach, 3rd edition, McGraw Hill Book Co. Inc., New York, USA, pp: 481. Thompson JL, Hinton M, 1997. Antibacterial activity of for- mic and propionic acids in the diets of hens on salmonellas in the crop. Br Poult Sci, 38, 59-65.
• Veldman A, Vahl HA, 1994. Xylanase in broiler diets with dif- ferences in characteristics and content of wheat. Br Poult Sci, 35, 537-550.
• Vranjes MV, Wenk C, 1995. Influence of dietary enzyme complex on the performance of broilers fed on diets with and without antibiotic supplementation. Br Poult Sci, 36, 265-75.
• Wu G, Bryant MM, Voitle RA, Roland SR, 2005. Effect of β-mannanase in corn-soy diets on commercial Leghorns in second cycle hens. Poult Sci, 84, 894-897.
• Wu YB, Ravindran V, Thomas DG, Birtles MJ, Hendriks, WH, 2004. Influence of phytase and xylanase, individually or in combination on performance, apparent metabolisable energy, digestive tract measurements and gut morphology in broilers fed wheat based diets containing adequate level of phosphorus. Br Poult Sci, 45, 76-84.
• Yu B, Wu ST, Liu CC, Gauthier R, Chiou PWS, 2007. Effects of enzyme inclusion in a corn-soybean diet on broiler perfor- mance. Anim Feed Sci Tech, 134, 283-294.
• Zanella NK, Sakomura FG, Silversides A, Fiqueirdo, Pack M, 1999. Effect of enzyme supplementation of broiler diets based on corn and soybeans. Poult Sci, 78, 561-568.