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Evolving enzyme technology: impact on commercial poultry nutrition

Published online by Cambridge University Press:  14 December 2007

A. J Cowieson*
Affiliation:
Danisco Animal Nutrition, PO Box 777, Marlborough, Wiltshire SN8 1XN, UK
M Hruby
Affiliation:
Danisco Animal Nutrition, PO Box 777, Marlborough, Wiltshire SN8 1XN, UK
E. E. M Pierson
Affiliation:
411 East Gano, St Louis, Missouri 63147, USA
*
Corresponding author: Dr Aaron Cowieson, fax +44 1672 517787, email [email protected]
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Abstract

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The use of exogenous enzymes to improve the nutritional value of poultry diets is a relatively new concept. The technology is rapidly evolving, with new enzymes, enzyme combinations, and novel applications being developed as rapidly as regulatory restrictions will allow. Most researchers in the field of poultry nutrition would consider phytase to be the last significant leap forward in terms of enzyme use in the animal feed industry. However, there is a great deal of ongoing research into the next generation of enzymes with a focus on ingredient quality, predictability of response via least-square models, improvements in food safety, effect of bird age, effect of various side activities and enzyme dose, maximisation of net income and reduction in environmental pollution. It is the purpose of the present review article to summarise the current research in the area of feed enzymes for poultry and to speculate on future applications of enzymes and new enzyme technologies that may be of value to the industry in the coming years.

Type
Research Article
Copyright
Copyright © The Authors 2006

References

Adeola, O & Bedford, MR (2005) Exogenous dietary xylanase ameliorates viscosity-induced anti-nutritional effects in wheat-based diets for White Pekin ducks (Anas platyrinchos). British Journal of Nutrition 92, 8794.CrossRefGoogle Scholar
Adeola, O & Sands, JS (2003) Does supplemental microbial phytase improve amino acid utilization? A perspective that it does not. Journal of Animal Science 81, 7885.Google Scholar
Ali, A, Williams, IH, Martin, GB & Sipas, S (2005) Hydrolysis of lupin pectin by pectinases for broilers. Proceedings of the Australian Poultry Science Symposium 17, 219222.Google Scholar
Angkanaporn, K, Choct, M, Bryden, WL, Annison, EF & Annison, G (1994) Effects of wheat pentosans on endogenous amino acid losses in chickens. Journal of the Science of Food and Agriculture 66, 399404.CrossRefGoogle Scholar
Apajalahti, JHA & Bedford, MR (1998) Nutrition effects on the microflora in the GI tract. In Proceedings of the 19th Western Nutrition Conference, pp. 6068. Saskatoon, Saskatchewan, Canada: University of Saskatchewan Extension Press.Google Scholar
Apajalahti, JHA, Kettunen, A, Bedford, MR, Holben, WE (2001) Percent G+C profiling accurately reveals diet-related differences in the gastrointestinal microbial community of broiler chickens. Applied Environmental Microbiology 67, 56565667.CrossRefGoogle ScholarPubMed
Apajalahti, JHA, Sarkilahti, LK, Maki, BR, Heikkinen, JP, Nurminen, PH & Holben, WE (1998) Effective recovery of bacterial DNA and percent-guanine-plus-cytosine-based analysis of community structure in the gastrointestinal tract of broiler chickens. Applied Environmental Microbiology 64, 40844088.CrossRefGoogle ScholarPubMed
Bach Knudsen, KE (1997) Carbohydrate and lignin contents of plant materials used in animal feeding. Animal Feed Science and Technology 67, 319338.CrossRefGoogle Scholar
Bedford, MR (2000 a) Exogenous enzymes in monogastric nutrition-their current value and future benefits. Animal Feed Science and Technology 86, 113.CrossRefGoogle Scholar
Bedford, MR (2000 b) Removal of antibiotic growth promoters from poultry diets: implications and strategies to minimize subsequent problems. World's Poultry Science Journal 56, 347366.CrossRefGoogle Scholar
Bedford, MR (2002) The role of carbohydrases in feedstuff digestion. In Poultry Feedstuffs: Supply, Composition and Nutritive Value, pp. 319336 [McNab, J and Boorman, N, editors]. Wallingford, UK: CAB International.CrossRefGoogle Scholar
Bedford, MR & Classen, HL (1992) Reduction of intestinal viscosity through manipulation of dietary rye and pentosanase concentration is effected through changes in the carbohydrate composition of the intestinal aqueous phase and results in improved growth rate and food conversion efficiency of broiler chicks. Journal of Nutrition 122, 560569.CrossRefGoogle ScholarPubMed
Bedford, MR & Classen, HL (1993) An in vitro assay for prediction of broiler intestinal viscosity and growth when fed rye-based diets in the presence of exogenous enzymes. Poultry Science 72, 137143.CrossRefGoogle Scholar
Bedford, MR, Classen, HL & Campbell, GL (1991) The effect of pelleting, salt and pentosanase on the viscosity of intestinal contents and performance of broilers fed rye. Poultry Science 70, 15711577.Google Scholar
Belyea, RL, Rausch, KD & Tumbleson, ME (2004) Composition of maize and distillers dried grains with solubles from dry grind ethanol processing. Bioresearch Technology 94, 293298.CrossRefGoogle ScholarPubMed
Biehl, RR & Baker, DH (1997) Microbial phytase improves amino acid utilization in young chicks fed diets based on soyabean meal but not diets based on peanut meal. Poultry Science 76, 355360.Google Scholar
Bjerrum, L, Pedersen, AB & Engberg, RM (2005) The influence of whole wheat feeding on Salmonella infection and gut flora composition in broilers. Avian Disease 49, 915.CrossRefGoogle ScholarPubMed
Bonnin, E, Daviet, S, Gebruers, K, Delcour, JA, Goldson, A, Juge, N & Saulnier, L (2005) Variation in the levels of the different xylanase inhibitors in grain and flour of 20 French wheat cultivars Journal of Cereal Science 41, 375379.Google Scholar
Choct, M (1997) Feed non-starch polysaccharides: chemical structure and nutritional significance. Feed Milling International, June 1997 1326.Google Scholar
Choct, M, Hughes, RJ & Bedford, MR (1999) Effects of xylanase on individual bird variation, starch digestion throughout the intestine, and ileal and caecal volatile fatty acid production in chickens fed wheat. British Poultry Science 40, 419422.CrossRefGoogle ScholarPubMed
Choct, M, Kocher, A, Waters, DL, Pettersson, D & Ross, G (2004) A comparison of three xylanases on the nutritive value of two wheats for broiler chickens. British Journal of Nutrition 92, 5361.CrossRefGoogle ScholarPubMed
Clarke, E & Wiseman, J (2005) Effects of variability in trypsin inhibitor content of soya bean meals on true and apparent ileal digestibility of amino acids and pancreas size in broiler chickens. Animal Feed Science and Technology 121, 125138.Google Scholar
Cowieson, AJ (2005) Factors that affect the nutritional value of maize for broilers. Animal Feed Science and Technology 119, 293305.Google Scholar
Cowieson, AJ & Acamovic, T (2003) Lupin non-starch polysaccharides and their effects on chickens. In Poisonous Plants and Related Toxins, pp. 304309 [Acamovic, T, Stewart, CS and Pennycott, TW, editors]. Wallingford, UK: CAB International.Google Scholar
Cowieson, AJ, Acamovic, T & Bedford, MR (2002) The effects of enzyme supplementation and lupin cultivar on the performance and endogenous losses of broiler chicks. In Proceedings of the 10th International Lupin Conference, Laugarvatn, Iceland, June 2002, pp. 323328. [van Santen, E and Hill, GD, editors]. Canterbury, New Zealand: International Lupin Association, Lincoln University.Google Scholar
Cowieson, AJ, Acamovic, T & Bedford, MR (2003) Supplementation of diets containing pea meal with exogenous enzymes: effects on weight gain, feed conversion, nutrient digestibility and gross morphology of the gastrointestinal tract. British Poultry Science 44, 427437.Google Scholar
Cowieson, AJ, Acamovic, T & Bedford, MR (2004) The effect of phytase and phytic acid on endogenous losses from broiler chickens. British Poultry Science 45, 101108.Google Scholar
Cowieson, AJ, Acamovic, T & Bedford, MR (2006 a) Phytic acid and phytase: implications for protein utilisation by poultry. Poultry Science 85, 878885.Google Scholar
Cowieson, AJ & Adeola, O (2005) Carbohydrases, protease, and phytase have an additive beneficial effect in nutritionally marginal diets for broiler chicks. Poultry Science 84, 18601867.CrossRefGoogle ScholarPubMed
Cowieson, AJ, Hruby, M & Faurschou Isaksen, M (2005) The effect of conditioning temperature and exogenous xylanase addition on the viscosity of wheat-based diets and the performance of broiler chicks. British Poultry Science 46, 717724.CrossRefGoogle Scholar
Cowieson, AJ, Sarkilahti, LK, Apajalahti, JHA, Acamovic, T & Bedford, MR (2000) Caecal microflora in broilers fed diets containing Camelina with and without enzyme supplementation. In Proceedings of the XXI World's Poultry Congress, CD ROM. Montreal, Quebec, Canada: World's Poultry Science Association; Candian Branch.Google Scholar
Cowieson, AJ, Singh, DN & Adeola, O (2006 b) Prediction of ingredient quality and the effect of a combination of xylanase, amylase, protease and phytase on the performance of broiler chicks. I. Growth performance and digestible nutrient intake. British Poultry Science(In the Press).Google ScholarPubMed
Cowieson, AJ, Singh, DN & Adeola, O (2006 c) Prediction of ingredient quality and the effect of a combination of xylanase, amylase, protease and phytase on the performance of broiler chicks. II. Energy and nutrient utilization. British Poultry Science(In the Press).Google Scholar
Cromwell, GL, Herkelman, KL & Stahly, TS (1993) Physical, chemical and nutritional characteristics of distillers grains with solubles for chicks and pigs. Journal of Animal Science 71, 679686.Google Scholar
Douglas, MW, Parsons, CM & Bedford, MR (2000) Effect of various soybean meal sources and Avizyme on chick growth performance and ileal digestible energy. Journal of Applied Poultry Research 9, 7480.Google Scholar
Engberg, RM, Hedemann, MS, Steenfeldt, S & Jensen, BB (2004) Influence of whole wheat feeding and xylanase on broiler performance and microbial composition and activity in the digestive tract. Poultry Science 83, 925938.Google Scholar
Ensgraber, M, Genitsariotis, R, Storkel, S & Loos, M (1992) Purification and characterisation of a Salmonella typhimurium agglutinin from gut mucus secretions. Microbial Pathogenesis 12, 255266.Google Scholar
Feng, G, Yun, J, Guang-Hong, Z & Zheng-Kang, H (2004) Effects of non-starch polysaccharide enzyme supplements on the growth, immune function and gastrointestinal microflora of chicks. Chinese Journal of Veterinary Science 24, 501503.Google Scholar
Fernandez, F, Sharma, R, Hinton, M & Bedford, MR (2000) Diet influences the colonization of Camplyobacter jejuni and distribution of mucin carbohydrates in the chick intestinal tract. Cellular and Molecular Life Sciences 57, 17931801.CrossRefGoogle Scholar
Fontes, CMGA, Ponte, PIP, Reis, TC, Soares, MC, Gama, LT, Dias, FMV & Ferreira, LMA (2004) A family 6 carbohydrate-binding module potentiates the efficacy of a recombinant xylanase used to supplement cereal-based diets for poultry. British Poultry Science 45, 648656.Google Scholar
Forstner, JF & Forstner, GG (1994) Gastrointestinal mucus. In Physiology of the Gastrointestinal Tract, pp. 12551283 [Johnson, LR, editor]. New York: Raven Press.Google Scholar
Fuller, MF & Reeds, PJ (1998) Nitrogen cycling in the gut. Annual Reviews of Nutrition 18, 385411.CrossRefGoogle ScholarPubMed
Gebruers, K, Brijs, K, Courtin, CM, Fierens, K, Goesaert, H, Rabijns, A, Raedschelders, G, Robben, J, Sansen, S & Sørensen, JF (2004) Properties of TXAI-type endoxylanase inhibitors. Biochimica et Biophysica Acta 1696, 213221.Google Scholar
Gebruers, K, Courtin, CM, Goesaert, H, van Campenhout, S, & Delcour, JA (2002) Endoxylanase inhibition activity in different European wheat cultivars and milling fractions. Journal of Cereal Chemistry 79, 613616.Google Scholar
Ghazi, S, Rooke, JA, Galbraith, H & Bedford, MR (2002) The potential for the improvement of the nutritive value of soya-bean meal by different proteases in broiler chicks and broiler cockerels. British Poultry Science 43, 7077.CrossRefGoogle ScholarPubMed
Gibson, GR, Willems, A, Reading, S & Collins, MD (1996) Fermentation of non-digestible oligosaccharides by human colonic bacteria. Proceedings of the Nutrition Society 55, 899912.Google Scholar
Goodson, J & Fontaine, J (2004) Variability in DDGS from ethanol plants. Feed Management 55, 2025.Google Scholar
Graham, H, Simmins, PH & Sands, JS (2003) Reducing environmental pollution using animal feed enzymes. Communications in Agriculture and Applied Biological Science 68, 285289.Google ScholarPubMed
Graham, KK, Kerley, MS, Firman, JD & Allee, GL (2002) The effect of enzyme treatment of soybean meal on oligosaccharide disappearance and chick growth performance. Poultry Science 81, 10141019.Google Scholar
Hillman, K (1999) Manipulation of the proportions of Lactobacillus spp. to coliform bacteria in the piglet colon using dietary starches. In Proceedings of the British Society of Animal Science. Penicuik, Midlothian, UK: British Society of Animal Science.Google Scholar
Hopwood, DE, Pethick, DW & Hampson, DJ (2002) Increasing the viscosity of the intestinal contents stimulates proliferation of enterotoxigenic Escherichia coli and Brachyspira pilosicoli in weaner pigs. British Journal of Nutrition 88, 523532.CrossRefGoogle ScholarPubMed
Huo, GC, Fowler, VR, Inborr, J & Bedford, MR (1993) The use of enzymes to denature antinutritive factors in soybean. In Proceedings of the 2nd International Workshop on ANFs in Legume Seed, Wageningen, paper 60. Wageningen, The Netherlands: European Association for Animal Production.Google Scholar
Ingelbrecht, JA, Verwimp, T & Declour, JA (2000) Endoxylanases in durum wheat semolina processing: solubilization of arabinoxylans, action of endogenous inhibitors, and effects on rheological properties. Journal of Agriculture and Food Chemistry 48, 20172022.Google Scholar
Jackson, ME, Geronian, K, Knox, A, McNab, J & McCartney, E (2004) A dose-response study with the feed enzyme β-mannanase in broilers provided with maize-soybean meal based diets in the absence of antibiotic growth promoters. Poultry Science 83, 19921996.Google Scholar
Jones, GPD & Taylor, RD (2001) Whole grain in pelleted diets for broiler chicks. British Poultry Science 42, 477483.CrossRefGoogle Scholar
Juanpere, J, Perez-Vendrell, AM, Angulo, E & Brufau, J (2005) Assessment of potential interactions between phytase and glycosidase enzyme supplementation on nutrient digestibility in broilers. Poultry Science 84, 571580.Google Scholar
Kettunen, H & Rautonen, N (2005) With betaine and exogenous enzymes towards improved intestinal health and immunity, and better performance of broiler chicks. Proceedings of the Poultry Science Association. Poultry Science 84, Suppl. 147 Abstr.Google Scholar
Kettunen, H, Simmins, H & Rautonen, N (2005) Improved intestinal health and immunity in broiler chicks when fed a combination of Betafin and Avizyme 1500. In Proceedings of Antimicrobial Growth Promoters: Worldwide Ban on the Horizon? Noordwijk aan Zee, the Netherlands, 2005, p. 113 [Barug, D, de Jong, J, Kics, AK and Verstegan, MWA, editors].Google Scholar
Kim, JC, Simmins, PH, Mullan, BP & Pluske, JR (2005) The effect of wheat phosphorus content and supplemental enzymes on digestibility and growth performance of weaner pigs. Animal Feed Science and Technology 118, 139152.Google Scholar
King, TP (1998) The carbohydrate biology of intestinal surfaces: interactions with dietary and microbial constituents. In Proceedings of the 19th Western Nutrition Conference, pp. 6988. Saskatoon, Saskatchewan, Canada: University of Saskatchewan Extension Press.Google Scholar
Kocher, A, Choct, M, Porter, MD & Broz, J (2002) Effects of feed enzymes on nutritive value of soybean meal fed to broilers. British Poultry Science 43, 5463.CrossRefGoogle Scholar
Kornegay, ET, Denbow, DM & Zhang, Z (1999) Influence of microbial phytase supplementation of a low protein/amino acid diet on performance, ileal digestibility of protein and amino acids, and carcass measurements of finishing broilers. In Phytase in Animal Nutrition and Waste Management, pp. 557572 [Coelho, MB and Kornegay, ET, editors]. Mount Olive, NJ: BASF Corporation.Google Scholar
Krawielitzki, K, Kreienbring, F, Zebrowska, T, Schadereit, R & Kowalczyk, J (1994) Estimation of N absorption, secretion and reabsorption in different intestinal sections of growing pigs using the 15N isotope dilution method. In Proceedings of the 6th International Digestive Physiology of Pigs, Dummerstorf, Germany, pp. 7982 [Souffrant, WB and Hagemeister, H, editors]. Wageningen, The Netherlands: European Association for Animal Production.Google Scholar
Krawielitzki, K, Zebrowska, T, Schaderiet, R, Kowalczyk, J & Henning, U (1990) Determining of nitrogen absorption and nitrogen secretion in different sections of the pigs intestine by digesta exchange between 15N labeled and unlabeled animals. Archives of Animal Nutrition 40, 2537.Google ScholarPubMed
Lan, Y, Verstegen, MWA, Tamminga, S & Williams, BA (2005) The role of the commensal gut microbial community in broiler chickens. World's Poultry Science Journal 61, 95104.CrossRefGoogle Scholar
Larsen, FM, Moughan, PJ & Wilson, MN (1993) Dietary fibre viscosity and endogenous protein excretion at the terminal ileum of growing rats. Journal of Nutrition 123, 18981904.CrossRefGoogle ScholarPubMed
Lazaro, R, Garcia, M, Aranibar, MJ & Mateos, GG (2003) Effect of enzyme addition to wheat-, barley- and rye-based diets on nutrient digestibility and performance of laying hens. British Poultry Science 44, 256265.Google Scholar
Leske, KL & Coon, CN (1999) Nutrient content and protein and energy digestibilities of ethanol-extracted, low a-galactoside soybean meal as compared to intact soybean meal. Poultry Science 78, 11771183.Google Scholar
Leslie, MA, Moran, ET, Bedford, MR (2005) The effects of phytase and glycanase supplementation to corn soy diets on AME. Poultry Science 84, Supp.1, 106.Google Scholar
Lumpkins, BS & Batal, AB (2005) The bioavailability of lysine and phosphorus in distillers dried grains with solubles. Poultry Science 84, 581586.Google Scholar
Lumpkins, BS, Batal, AB & Dale, NM (2004) Evaluation of distillers grains with solubles as a feed ingredient for broilers. Poultry Science 83, 18911896.Google Scholar
McLauchlan, WR, Garcia-Conesa, MT, Williamson, G, Roza, M, Ravenstein, P & Maat, J (1999) A novel class of protein from wheat which inhibits xylanases. Biochemical Journal 338, 441446.Google Scholar
Mansoori, B & Acamovic, T (1998) The influence of tannic acid on the amino acid digestibility in broilers. In Toxic Plants and other Natural Toxicants, pp. 106110 [Garlan, T and Barr, AC, editors]. Wallingford, UK: CAB International.Google Scholar
Martinez Amezuca, M, Parsons, CM & Noll, SL (2004) Content and relative bioavailability of phosphorus in distillers dried grains with solubles in chicks. Poultry Science 83, 971976.Google Scholar
Mathlouthi, N, Juin, H & Larbier, M (2003 a) Effect of xylanase and beta-glucanase supplementation of wheat- or wheat- and barley-based diets on the performance of male turkeys. British Poultry Science 44, 291298.Google Scholar
Mathlouthi, N, Mohamed, MA & Larbier, M (2003 b) Effect of enzyme preparation containing xylanase and beta-glucanase on performance of laying hens fed wheat/barley- or maize/soybean meal-based diets. British Poultry Science 44, 6066.CrossRefGoogle ScholarPubMed
Meng, X, Slominski, BA, Nyachoti, CM, Campbell, LD & Guenter, W (2005) Degradation of cell wall polysaccharides by a combination of carbohydrase enzymes and their effect on nutrient utilization and broiler chicken performance. Poultry Science 84, 3747.Google Scholar
Mulyantini, NGA, Choct, M, Li, X & Lole, UR (2005) The effect of xylanase, phytase and lipase supplementation on the performance of broiler chickens fed a diet with a high level of rice bran. Proceedings of the Australian Poultry Science Symposium 17, 305307.Google Scholar
Muramatsu, T, Kodama, H, Morishita, T, Furuse, M & Okumura, J (1991) Effect of intestinal microflora on digestible energy and fibre digestion in chickens fed a high-fibre diet. American Journal of Veterinary Research 52, 11781181.Google Scholar
Muramatsu, T, Nakajima, S & Okumura, J (1994) Modification of energy metabolism by the presence of the gut microflora in the chicken. British Journal of Nutrition 71, 709717.CrossRefGoogle ScholarPubMed
Namkung, H & Leeson, S (1999) Effect of phytase enzyme on dietary nitrogen-corrected apparent metabolizable energy and the ileal digestibility of nitrogen and amino acids. Poultry Science 78, 13171319.Google Scholar
National Research Council (1994) Nutrient Requirements of Poultry, 9th revised ed. Washington, DC: National Academy Press.Google Scholar
Naveed, A, Acamovic, T & Bedford, MR (1999) The influence of carbohydrase and protease supplementation on amino acid digestibility of lupin-based diets for broiler chicks. Proceedings of the Australian Poultry Science Symposium 11, 9396.Google Scholar
Nilsson, M, Andersson, R, Andersson, RE, Autio, K & Åman, P (2000) Heterogeneity in water-extractable rye arabinoxylan with a low degree of distribution. Carbohydrate Polymers 41, 397405.Google Scholar
Odetallah, NH, Wang, JJ, Garlich, JD & Shih, JCH (2005) Versazyme supplementation of broiler diets improves market growth performance. Poultry Science 84, 858864.CrossRefGoogle ScholarPubMed
Onyango, EM, Asem, EK, Sands, JS & Adeola, O (2004) Dietary phytates increase endogenous losses in ducks and chickens. Journal of Animal Science. 82, Suppl. 1, 149150.Google Scholar
Onyango, EM, Bedford, MR & Adeola, O (2005) Phytase activity along the gastrointestinal tract of the broiler chick: a comparative study of an Eschericia colia-derived and Peniophora lycii phytase. Canadian Journal of Animal Science 85, 6168.Google Scholar
Ponte, PIP, Ferreira, LMA, Soares, MAC, Gama, LT & Fontes, CMGA (2004) Xylanase inhibitors affect the action of exogenous enzymes used to supplement Triticum durum -based diets for broiler chicks. Journal of Applied Poultry Research 13, 660666.Google Scholar
Ravindran, V, Selle, PH & Bryden, WL (1999) Effects of phytase supplementation, individually and in combination, with glycanase, on the nutritive value of wheat and barley. Poultry Science 78, 15881595.Google Scholar
Reid, CA & Hillman, K (1999) The effects of retrogradation and amylose/amylopectin ratio of starches on carbohydrate fermentation and microbial populations in the porcine colon. Animal Science 68, 503510.CrossRefGoogle Scholar
Rosen, GD (2001) The nutritive value of phytase in broilers. In Proceedings of the 13th Symposium on Poultry Nutrition, Blankenberge, Belgium, pp. 215220.Google Scholar
Rosen, GD (2002 a) Exogenous enzymes as pro-nutrients in broiler diets. In Recent Advances in Animal Nutrition, pp. 89103 [Garnsworthy, PC and Wiseman, J, editors]. Nottingham, UK: Nottingham University Press.Google Scholar
Rosen, GD (2002 b) Microbial phytase in broiler nutrition. In Recent Advances in Animal Nutrition, pp. 105117 [Garnsworthy, PC and Wiseman, J, editors]. Nottingham, UK: Nottingham University Press.Google Scholar
Saleh, F, Ohtsuka, A, Tanaka, T & Hayashi, K (2004) Carbohydrases are digested by proteases present in enzyme preparations during in vitro digestion. Journal of Poultry Science 41, 220235.Google Scholar
Savory, CJ (1992) Enzyme supplementation, degradation and metabolism of three 14C-labelled cell-wall substrates in the fowl. British Journal of Nutrition 67, 91102.Google Scholar
Scott, TA (2005) The impact of pelleting and enzyme supplementation on feed value of twenty-five Canadian wheat samples. Proceedings of the Australian Poultry Science Symposium 17, 138144.Google Scholar
Selle, PH, Ravindran, V, Caldwell, RA & Bryden, WL (2000) Phytate and phytase: consequences for protein utilization. Nutrition Research Reviews 13, 255278.Google Scholar
Shakouri, MD & Kermanshahi, H (2005) Effect of NSP degrading enzyme supplement on the nutrient digestibility of young chickens fed wheat with different viscosities and triticale. Journal of Agricultural and Scientific Technology 5, 105112.Google Scholar
Sieo, CC, Abdullah, N, Tan, WS & Ho, YW (2005) Influence of β-glucanase-producing Lactobacillus strains on intestinal characteristics and feed passage rate of broiler chickens. Poultry Science 84, 734741.Google Scholar
Silversides, FG, Bedford, MR (1999) Effect of pelleting temperature on the recovery and efficacy of a xylanase enzyme in wheat-based diets. Poultry Science 78, 11841190.CrossRefGoogle ScholarPubMed
Simons, PC, Versteegh, HA, Jongbloed, AW, Kemme, PA, Slump, P, Bos, KD, Wolters, MG, Beudeker, RF & Verschoor, GJ (1990) Improvement in phosphorus availability by microbial phytase in broilers and pigs. British Journal of Nutrition 64, 525540.Google Scholar
Spiehs, MJ, Whitney, MH & Shurson, GC (2002) Nutrient database for distiller's dried grains with solubles produced from new ethanol plants in Minnesota and South Dakota. Journal of Animal Science 80, 26392645.Google Scholar
Summers, JD (2001) Maize: factors affecting its digestibility and variability in its feeding value. In Enzymes in Farm Animal Nutrition, pp. 109124 [Bedford, MR and Partridge, GG, editors]. Wallingford, UK: CAB International.Google Scholar
Svihus, B, Juvik, E, Hetland, H & Krogdahl, A (2004) Causes for improvement in nutritive value of broiler chicken diets with whole wheat instead of ground wheat. British Poultry Science 45, 5560.Google Scholar
Timmler, R & Rodehutscord, M (2001) Efficiency of different xylanase preparations in diets for Pekin ducks. Archiv für Tierernährung 55, 315332.Google Scholar
Vahjen, W, Glaser, K, Schafer, K & Simon, O (1998) Influence of xylanase-supplemented feed on the development of selected bacterial groups in the intestinal tract of broiler chicks. Journal of Agricultural Science 130, 489500.Google Scholar
Vahjen, W, Busch, T & Simon, O (2005) Study on the use of soyabean polysaccharide degrading enzymes in broiler nutrition. Animal Feed Science and Technology 120, 259276.Google Scholar
van der Klis, JD, van Voorst, A & van Cruyningen, C (1993) Effect of a soluble polysaccharide (carboxy methyl cellulose) on the physico-chemical conditions in the gastrointestinal tract of broilers. British Poultry Science 34, 971983.Google Scholar
Wagner, DD, Thomas, OP (1977) Influence of diets containing rye or pectin on the intestinal flora of chicks. Poultry Science 57, 971975.Google Scholar
Wang, ZR, Qiao, SY, Lu, WQ & Li, DF (2005) Effects of enzyme supplementation on performance, nutrient digestibility, gastrointestinal morphology, and volatile fatty acid profiles in the hind gut of broilers fed wheat-based diets. Poultry Science 84, 875881.Google Scholar
Watson, BC, Matthews, JO, Southern, LL & Shelton, JL (2005) The interactive effects of Eimeria acervulina and phytase for broiler chicks. Poultry Science 84, 910913.Google Scholar
Wu, G, Bryant, MM, Voitle, RA & Roland, DA Sr. (2005) Effects of β-mannanase in maize-soy diets on commercial leghorns in second-cycle hens. Poultry Science 84, 894897.Google Scholar
Wu, YB, Ravindran, V, Thomas, DG, Birtles, MJ & Hendriks, WH (2004) Influence of method of whole wheat inclusion and xylanase supplementation on the performance, apparent metabolisable energy, digestive tract measurements and gut morphology of broilers. British Poultry Science 45, 385394.CrossRefGoogle ScholarPubMed
Yasar, S & Forbes, JM (1999) Performance and gastro-intestinal response of broiler chickens fed on cereal grain-based foods soaked in water. British Poultry Science 40, 6576.Google Scholar
Yasar, S & Forbes, JM (2000) Enzyme supplementation of dry and wet wheat-based feeds for broiler chickens: performance and gut responses. British Journal of Nutrition 84, 297307.Google Scholar
Zhang, ZB, Kornegay, ET & Denbow, DN (1999) Evaluation of phytase and non-starch polysaccharide (NSP) enzymes added alone and in combination on nutrient utilization of individual and mixtures of feedstuffs with adult cecectomized roosters. Poultry Science 78, Suppl. 173 Abstr.Google Scholar
Zyla, K, Ledoux, DR, Kujawski, M & Veum, TL (1996) The efficacy of an enzymic cocktail and a fungal mycelium in dephosphorylating maize-soybean meal-based feeds fed to growing turkeys. Poultry Science 75, 381387.CrossRefGoogle Scholar
Zyla, K, Wikiera, A, Koreleski, J, Swiatkiewicz, S, Piironen, J & Ledoux, DR (2000) Comparison of the efficacies of a novel aspergillus niger mycelium with separate and combined effectiveness of phytase, acid phosphatase, and pectinase in dephosphorylation of wheat-based feeds fed to growing broilers. Poultry Science 79, 14341443.Google Scholar