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Enhancing the nutritional value of soybeans for poultry through supplementation with new-generation feed enzymes

Published online by Cambridge University Press:  26 May 2016

M.M. ERDAW ,
M.M. BHUIYAN  and
P.A. IJI
M.M. ERDAW
Affiliation:
School of Environmental and Rural Sciences, University of New England, Australia Ethiopian Institute of Agricultural Research, Debre-Zeit Centre, Ethiopia
M.M. BHUIYAN
Affiliation:
School of Environmental and Rural Sciences, University of New England, Australia
P.A. IJI*
Affiliation:
School of Environmental and Rural Sciences, University of New England, Australia
*
Corresponding author: piji@une.edu.au or leulmammo@yahoo.com
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Abstract

Soybean meal (SBM) remains the most important and preferred protein feed source for poultry. However, the supply and quality of SBM fluctuates, and the meal is expensive due to processing and transportation costs. Although there is a growing interest in the use of raw SBM for birds, its nutritive value is negatively affected by the presence of anti-nutritive factors (ANF). Heat treatment is applied to alleviate some ANF, such as trypsin inhibitors and lectins, but both under- and over-processing of soybeans can reduce the digestibility of key components in the meal. Feed supplementation with exogenous enzymes, such as phytase and protease enzymes, is a biotechnological option for improving the nutritional values of SBM and other protein-rich ingredients. Proteases break down both stored proteins and proteinaceous anti-nutrients in feeds. Various studies have shown that the performance of birds can be improved through dietary supplementation with new-generation protease enzymes. Phytase is also effective in breaking down phytate (phytic acid), which chelates with mineral cations and other nutrients in soybeans. Recent in vitro and in vivo studies have shown that an enzyme cocktail (combined use of protease and phytase) is more effective in reducing ANF in soybean meal for birds than the use of single enzyme products. This review provides information on how microbial enzymes, particularly protease and phytase, contribute to the improvement of the nutritional values of different types of SBM for poultry.

Keywords

new-generation enzymesanti-nutritional factorssoybean mealnutrients
Type
Reviews
Information
World's Poultry Science Journal , Volume 72 , Issue 2 , June 2016 , pp. 307 - 322
Copyright
Copyright © World's Poultry Science Association 2016 

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References

ABUDABOS, A. (2010) Enzyme supplementation of corn-soybean meal diets improves performance in broiler chicken. International Journal of Poultry Science 9: 292-297.CrossRefGoogle Scholar
ADEOLA, O. and SANDS, J. (2003) Does supplemental dietary microbial phytase improve amino acid utilisation? A perspective that it does not. Journal of Animal Science 81: E78-E85.Google Scholar
ALETOR, V.A. and OLONIMOYO, F.I. (1992) Feeding differently processed soya bean Part 1. Effect on performance, protein utilization, relative organ weights, carcass traits and economics of producing broiler-chickens. Food/Nahrung 36: 357-363.Google Scholar
AMERAH, A., GILBERT, C., SIMMINS, P. and RAVINDRAN, V. (2011) Influence of fee processing on the efficacy of exogenous enzymes in broiler diets. World's Poultry Science Journal 67: 29-46.Google Scholar
ANGEL, C., SAYLOR, W., VIEIRA, S. and WARD, N. (2011) Effects of a monocomponent protease on performance and protein utilisation in 7-to 22-day-old broiler chickens. Poultry Science 90: 2281-2286.CrossRefGoogle Scholar
ARABA, M. and DALE, N. (1990) Evaluation of protein solubility as an indicator of overprocessing soybean meal. Poultry Science 69: 76-83.CrossRefGoogle Scholar
AO, T. (2011) Using exogenous enzymes to increase the nutritional value of soybean meal in poultry diet, in: EL-SHEMY, H. (Ed) Soybean and nutrition, pp. 201-214 (InTech, Rijeka, Croatia).Google Scholar
ASA (AMERICAN SOYBEAN ASSOCIATION) SOY STATS (1997) A reference guide to important soybean facts and figures. American Soybean Association, USA, pp. 45.Google Scholar
ASA (AMERICAN SOYBEAN ASSOCIATION) (2004) Whole soybeans in diets for poultry. Available online: http://www.thepoultrysite.com/articles/194/whole-soybeans-in-diets-for-poultry 2014.Google Scholar
ASYIFAH, M., ABD-AZIZ, S., PHANG, L. and AZLIAN, M. (2012) Brown rice as a potential feedstuff for poultry. The Journal of Applied Poultry Research 21: 103-110.Google Scholar
BAMGBOSE, A., AWOSANYA, O., OJO, O. and OSO, A. (2005) Performance of broilers fed enzyme-supplemented tigernut (Cyperus rotundus L.) meal diets. Ghana Journal of Agricultural Science 38: 89-93.Google Scholar
BANASZKIEWICZ, T. (2011) Nutritional value of soybean meal, in: EL-SHEMY, H.A. (Ed) Soybean and nutrition, pp. 1-20 (InTech, Rijeka, Croatia).Google Scholar
BARLETTA, A. (2011) Introduction: current market and expected developments, in: BEDFORD, M.R. & PARTRIDGE, G.G. (Eds) Enzymes in farm animal nutrition, pp. 1-11 (CABI, Wallingford, UK).Google Scholar
BARTH, C.A., LUNDING, B., SCHMITZ, M. and HAGEMEISTER, H. (1993) Soybean trypsin inhibitor (s) reduce absorption of exogenous and increase loss of endogenous protein in miniature pigs. The Journal of Nutrition 123: 2195-2200.Google Scholar
CABAHUG, S., RAVINDRAN, V., SELLE, P. and BRYDEN, W. (1999) Response of broiler chickens to microbial phytase supplementation as influenced by dietary phytic acid and non-phytate phosphorus contents. I. Effects on bird performance and toe ash. British Poultry Science 40: 660-666.Google Scholar
CAMPBELL, L. and SCHÖNE, F. (1998) Effects of antinutritional factors in rapeseed. Publication-European Association for Animal Production 93: 185-198.Google Scholar
CECCANTINI, M. and MONTANHINI, R.N. (2011) Evaluation of a carbohydrolase in corn/soybean-based diets for broilers. XXII Latin American Poultry Congress 2011. Available online: http://en.engormix.com/MA-poultry-industry/nutrition/articles/evaluation-carbohydrolase-corn-soybean-t1861/141-p0.htm.Google Scholar
CHEN, Y., DUAN, W., WANG, L., ZHANG, S. and ZHOU, Y. (2013) Effects of thermostable phytase supplementation on the growth performance and nutrient digestibility of broilers. International Journal of Poultry Science 12: 441-444.Google Scholar
CHOCT, M., DERSJANT-LI, Y., MCLEISH, J. and PEISKER, M. (2010) Soy oligosaccharides and soluble non-starch polysaccharides: a review of digestion, nutritive and anti-nutritive effects in pigs and poultry. Asian-Australian Journal of Animal Science 23: 1386-1398.Google Scholar
CLARKE, E. and 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 chicks. Animal Feed Science and Technology 121: 125-138.Google Scholar
CLEMENTE, A., JIMENEZ, E., MARIN-MANZANO, M.C. and RUBIO, L.A. (2008) Active Bowman-Birk inhibitors survive gastrointestinal digestion at the terminal ileum of pigs fed chickpea-based diets. Journal of Science of Food and Agriculture 88: 513-521.Google Scholar
COWIESON, A. and ADEOLA, O. (2005) Carbohydrases, protease, and phytase have an additive beneficial effect in nutritionally marginal diets for broiler chicks. Poultry Science 84: 1860-1867.Google Scholar
COWIESON, A. and RAVINDRAN, V. (2008) Effect of exogenous enzymes in maize-based diets varying in nutrient density for young broilers: growth performance and digestibility of energy, minerals and amino acids. British Poultry Science 49: 37-44.Google Scholar
CROWELL, G.L. (2012) Soybean meal. An exceptional protein source. Available online: http://www.soymeal.org/ReviewPapers/SBMExceptionalProteinSource.pdf.Google Scholar
DEI, H.K. (2011) Soybean as a feed ingredient for livestock and poultry, in: DORA KREZHOVA (Ed) Recent trends for enhancing the diversity and quality of soybean products, pp. 215-216 (InTech, Rijeka, Croatia).Google Scholar
DIPIETRO, C.M. and LIENER, I.E. (1989) Heat inactivation of the Kunitz and Bowman-Birk soybean protease inhibitors. Journal of Agriculture and Food Chemistry 37: 39-44.Google Scholar
DOURADO, L.R.B., PASCOAL, L.A.F., SAKOMURA, N.K., COSTA, F.G.P. and BIAGIOTTI, D. (2011) Soybeans (Glycine max) and soybean products in poultry and swine nutrition, in: DORA KREZHOVA (Ed) Recent Trends for Enhancing the Diversity and Quality of Soybean Products, pp. 175-190 (InTech, Rijeka, Croatia).Google Scholar
ERDAW, M.E., PEREZ-MALDONADO, R.A., BHUIYAN, M.M. and IJI, P.A. (2015a) Response of broiler chicks fed on steam- or cold-pelleted diets containing raw full-fat soybean meal. 20th European Symposium on Poultry Nutrition, 24-27 August 2015, Prague, Czech Republic, pp. 179-180.Google Scholar
ERDAW, M.E., PEREZ-MALDONADO, R.A., BHUIYAN, M.M. and IJI, P.A. (2015b) Replacement value of raw full-fat soybean for commercial soybean meal supplemented with a new-generation protease. 20th European Symposium on Poultry Nutrition, 24-27 August 2015, Prague, Czech Republic, pp. 418-419.Google Scholar
FAO (2014) Protein sources for the animal feed industry. proceedings: FAO Expert consultation and workshop Bangkok 2014 held in 29 April - 3 May 2002, Bangkok.Google Scholar
FREITAS, D., VIEIRA, S., ANGEL, C., FAVERO, A. and MAIORKA, A. (2011) Performance and nutrient utilisation of broilers fed diets supplemented with a novel mono-component protease. Journal of Applied Poultry Research 20: 322-334.CrossRefGoogle Scholar
GHAZI, A., ZOHAIR, G.A., AL-MAKTARI, MOHAMED and AMER, M. (2012) A comparative effect of mash and pellet feed on broiler performance and ascites at high altitude. Global Veterinarian 9: 154-159.Google Scholar
GRIESHOP, C.M., KADZERE, C.T., CLAPPER, G.M., FLICKINGER, E.A., BAUER, L.L., FRAZIER, R.L. and FAHEY, G.C. (2003) Chemical and nutritional characteristics of United States soybeans and SBM. Journal of Agriculture and Food Chemistry 51: 7684-7691.CrossRefGoogle Scholar
GU, C., PAN, H., SUN, Z. and QIN, G. (2010) Effect of soybean variety on anti-nutritional factors content, and growth performance and nutrients metabolism in rat. International Journal of Molecular Science 11: 1048-1056.Google Scholar
HAJATI, H. (2010) Effects of enzyme supplementation on performance, carcass characteristics, carcass composition and some blood parameters of broiler chicken. American Journal of Animal Veterinary Science 5: 221.Google Scholar
HEUZÉ, V., TRAN, G. and KAUSHIK, S. (2015) Soybean meal. Feedipedia.org: A programme by INRA, CIRAD, AFZ and FAO. Available online: http://www.feedipedia.org/node/674.Google Scholar
JEZIERNY, D., MOSENTHIN, R. and BAUER, E. (2010) The use of grain legumes as a protein source in pig nutrition: A review. Animal Feed Science and Technology 157: 111-128.Google Scholar
JIANG, Z., ZHOU, Y., LU, F., HAN, Z. and WANG, T. (2008) Effects of different levels of supplementary alpha-amylase on digestive enzyme activities and pancreatic amylase mRNA expression of young broilers. Asian-Australian Journal of Animal Science 21: 97-102.Google Scholar
JOHRI, T.S. (2005) Endogenous and exogenous feed toxins, in: Poultry nutrition research in India and its perspective. Available online: http://www.fao.org/docrep/article/agrippa/659_en-10.htm.Google Scholar
KARR-LILIENTHAL, L., KADZERE, C., GRIESHOP, C. and FAHEY, J.R. (2005) Chemical and nutritional properties of soybean carbohydrates as related to nonruminants: A review. Livestock Production Science 97: 1-12.Google Scholar
KASHANI, S., MOHEBBIFAR, A., HABIBIAN, M. and TORKI, M. (2014) Effects of phytase supplementation of low protein diets on performance, egg quality traits and blood biochemical parameters of laying hens. Annual Research Review in Biology 4: 684-698.Google Scholar
KOCHER, A., CHOCT, M., PORTER, M. and BROZ, J. (2002) Effects of feed enzymes on nutritive value of soyabean meal fed to broilers. British Poultry Science 43: 54-63.Google Scholar
LALL, S.P. (1991) Digestibility, metabolism and excretion of dietary phosphorus, in: COWEY, C.B. & CHO, C.Y. (Eds) Nutritional Strategies and Aquaculture Waste. Proceeding of the 1st International Symposium of Nutritional Strategies in Management of Aquaculture Waste. Guelph, Ontario, pp. 77-90.Google Scholar
LIENER, I.E. (1994) Implications of antinutritional components in soybean foods. Critical Reviews in Food Science and Nutrition 34: 31-67.Google Scholar
LIENER, I.E. (1995) Possible adverse effects of soybean anticarcinogens. The Journal of Nutrition 125 (Suppl.): 744S- 744S-750S.Google ScholarPubMed
LIU, B.L., RAFIQ, A., TZENG, Y.M. and ROB, A. (1998) The induction and characterization of phytase and beyond. Enzyme and Microbial Technology 22: 415-424.Google Scholar
LIU, S., SELLE, P., COURT, S. and COWIESON, A. (2013) Protease supplementation of sorghum-based broiler diets enhances amino acid digestibility coefficients in four small intestinal sites and accelerates their rates of digestion. Animal Feed Science and Technology 183: 175-183.Google Scholar
LOKURUKA, M. (2011) Effects of processing on soybean nutrients and potential impact on consumer health: an overview. African Journal of Food, Agriculture, Nutrition and Development 11: Available online: http://dx.doi.org/10.4314/ajfand.v11i4.69170.CrossRefGoogle Scholar
MACISAAC, J., BURGOYNE, K., ANDERSON, D. and RATHGEBER, B. (2005) Roasted full-fat soybeans in starter, grower, and finisher diets for female broiler turkeys. Journal of Applied Poultry Research 14: 116-121.Google Scholar
MCDONALD, P., GREENHALGH, J.F.D., EDWARDS, R. and MORGAN, C.A. (2002) Animal nutrition. 6th edit. Pearson Education Limited, Edinburgh Gate Harlow Essex CM20 2JE, England, pp. 525-378.Google Scholar
MENG, X., SLOMINSKI, B., CAMPBELL, L., GUENTER, W. and JONES, O. (2006) The use of enzyme technology for improved energy utilisation from full-fat oilseeds. Part I: Canola seed. Poultry Science 85:1025-1030.Google Scholar
MOGRIDGE, J., SMITH, T. and SOUSADIAS, M. (1996) Effect of feeding raw soybeans on polyamine metabolism in chicks and the therapeutic effect of exogenous putrescine. Journal of Animal Science 74: 1897-1904.Google Scholar
MOJTABA, Y. (2008) Feed processing in the poultry industry. Available online: http://www.worldpoultry.net/Home/General/2008/10/Feed-processing-in-the-poultry-industry-WP003217W/.Google Scholar
MOURE, A., SINEIRO, J., DOMÍNGUEZ, H. and PARAJÓ, J.C. (2006) Functionality of oilseed protein products: A review. Food Research International 39: 945-963.CrossRefGoogle Scholar
MURUGESAN, G.R., ROMERO, L.F. and PERSIA, M.E. (2014) Effects of protease, phytase and a bacillus sp. direct-fed microbial on nutrient and energy digestibility, ileal brush border digestive enzyme activity and cecal short-chain fatty acid concentration in broiler chickens. PloS one 9: DOI: 10.1371/journal.pone.0101888.CrossRefGoogle Scholar
NAHASHON, S.N. and KILONZO-NTHENGE, A.K. (2013) Soybean in Monogastric Nutrition: Modifications to Add Value and Disease Prevention Properties, in: EL-SHEMY, H.A. (Ed) Soybean - Bio-Active Compounds, pp. 309-352 (In Tech Rijeka, Croatia).Google Scholar
NATIONAL RESEARCH COUNCIL (1994) Nutrient requirements of poultry. 9th rev. ed. National Academy Press, Washington, DC.Google Scholar
NEWKIRK, R. (2010) Soybean. Feed industry guide,1st edition Canadian International Grains Institute, pp.48. Available online: http://www.cigi.ca/feed.htm.Google Scholar
OIL-WORLD (2010) Major meals, world summary balances. Oil world weekly 55: 45. Available online: http://www.feedipedia.org/node/3020.Google Scholar
O'QUINN, P., KNABE, D., GREGG, E. and LUSAS, E. (1997) Nutritional value for swine of soybean meal produced by isopropyl alcohol extraction. Journal of Animal Science 75: 714-719.Google Scholar
OMOJOLA, A. and ADESEHINWA, A. (2007) Supplemented with Graded Levels of Roxazyme G®. International Journal of Poultry Science 6: 335-339.CrossRefGoogle Scholar
OXENBOLL, K., PONTOPPIDAN, K. and FRU-NJI, F. (2011) Use of a protease in poultry feed offers promising environmental benefits. International Journal of Poultry Science 10: 842-848.Google Scholar
PAHM, S. and STEIN, H. (2007) Ileal AA digestibility of a new high protein variety of soybeans fed to growing pigs. Journal of Animal Science 85 (Suppl. 2): abstract.Google Scholar
PALACIOS, M., EASTER, R., SOLTWEDEL, K., PARSONS, C., DOUGLAS, M., HYMOWITZ, T. and PETTIGREW, J. (2004) Effect of soybean variety and processing on growth performance of young chicks and pigs. Journal of Animal Science 82: 1108-1114.Google Scholar
PALLAUF, J. and RIMBACH, G. (1997) Nutritional significance of phytic acid and phytase. Archives Animal Nutrition 50: 301-319.Google Scholar
PEREZ-MALDONADO, R., MANNION, P. and FARRELL, D. (2003) Effects of heat treatment on the nutritional value of raw soybean selected for low trypsin inhibitor activity. British Poultry Science 44: 299-308.Google Scholar
PETER, C.M. and BAKER, D.H. (2001) Microbial phytase does not improve protein-amino acid utilisation in soybean meal fed to young chickens. Journal of Nutrition 131: 1792-1797.Google Scholar
PETER, C.M. and BAKER, D.H. (2001) Bioavailability of phosphorus in corn gluten feed derived from conventional and low-phytate maize. Animal Feed Sciences & Technology 95: 63-71.Google Scholar
PETTERSSON, D. and PONTOPPIDAN, K. (2013) Soybean meal and the potential for upgrading its feeding value by enzyme supplementation, in: EL-SHEMY, A. (Ed) Soybean - Bio-Active Compounds, pp. 288-307 (Intech, Open Access Publisher).Google Scholar
PETTIGREW, J.E., SOLTWEDEL, K.T., MIGUEL, J.C. and PALACIOS, M.F. (2008) Fact sheet - Soybean use for swine. soybean meal information centre. Available online: http://www.soymeal.org/FactSheets/SwineSoybeanUse.pdf.Google Scholar
PIERSON, E., POTTER, L. and BROWN, R. (1980) Amino acid digestibility of dehulled soybean meal by adult turkeys. Poultry Science 59: 845-848.Google Scholar
RABOY, V. (2009) Approaches and challenges to engineering seed phytate and total phosphorus. Plant Science 177: 281-296.Google Scholar
RADA, V., LICHOVNIKOVA, M. and FOLTYN, M. (2014) The effect of serine protease on broiler growth and carcass quality. Acta Fytotechnica et Zootechnica 17: 87-89.Google Scholar
RAVINDRAN, V. (2013) The role of poultry in human nutrition, in: FAO. Poultry Development Review, pp.1-8. Available online : http://www.fao.org/3/a-i3531e.pdf.Google Scholar
RAVINDRAN, V., SELLE, P. and BRYDEN, W. (1999) Effects of phytase supplementation, individually and in combination, with glycanase, on the nutritive value of wheat and barley. Poultry Science 78: 1588-1595.Google Scholar
RAVINDRAN, V., ABDOLLAHI, M. and BOOTWALLA, S. (2014a) Nutrient analysis, apparent metabolisable energy and ileal amino acid digestibility of full fat soybean for broilers. Animal Feed Science and Technology 197: 233-240.Google Scholar
RAVINDRAN, V., ABDOLLAHI, M.R. and BOOTWALLA, S.M. (2014b) Nutrient analysis, metabolizable energy, and digestible amino acids of soybean meals of different origins for broilers. Poultry science 93: 2567-2577.CrossRefGoogle ScholarPubMed
REZAEI, M., BORBOR, S., ZAGHARI, M. and TEIMOURI, A. (2007) Effect of Phytase supplementation on nutrients availability and performance of broiler chicks. International Journal of Poultry Science 6: 55-58.Google Scholar
ROMERO, L. and PLUMSTEAD, P. (2013) Bio-efficacy of feed proteases in poultry and their interaction with other feed enzymes. 24Th Annual Australian Poultry Science Symposium. Sydney, New South Wales 17th -20th February 2013.Google Scholar
RUIZ, N., DE BELALCAZAR, F. and DIAZ, G. (2004) Quality control parameters for commercial full-fat soybeans processed by two different methods and fed to broilers. Journal of Applied Poultry Research 13: 443-450.Google Scholar
SANTOS, F., HRUBY, M., PIERSON, E., REMUS, J. and SAKOMURA, N. (2008) Effect of phytase supplementation in diets on nutrient digestibility and performance in broiler chicks. Journal of Applied Poultry Research 17: 191-201.Google Scholar
SELL, J.L., TENESACA, L.G. and BALES, G.L. (1979) Influence of dietary fat on energy utilisation by laying hens. Poultry Science 58: 900-905.Google Scholar
SELLE, P., CADOGAN, D., RU, Y. and PARTRIDGE, G. (2010) Impact of exogenous enzymes in sorghum-or wheat-based broiler diets on nutrient utilisation and growth performance. International Journal of Poultry Science 9: 53-58.Google Scholar
SELLE, P., RAVINDRAN, V., CALDWELL, A. and BRYDEN, W. (2000) Phytate and phytase: consequences for protein utilisation. Nutrition Research Reviews 13: 255-278.Google Scholar
SELLE, P., RAVINDRAN, V., RAVINDRAN, G., PITTOLO, P. and BRYDEN, W. (2003) Influence of phytase and xylanase supplementation on growth performance and nutrient utilisation of broilers offered wheat-based diets. Asia-Australian Journal of Animal Science 16: 394-402.Google Scholar
SELLE, P.H. and RAVINDRAN, V. (2007) Microbial phytase in poultry nutrition. Animal Feed Science and Technology 135: 1-41.Google Scholar
SELLE, P., LIU, S.Y., CAI, J. and COWIESON, A. (2013) Steam-pelleting temperatures, grain variety, feed form and protease supplementation of mediumly ground, sorghum-based broiler diets: influences on growth performance, relative gizzard weights, nutrient utilisation, starch and nitrogen digestibility. Animal Production Science 53: 378-387.Google Scholar
SENKOYLU, N., SAMLI, H.E., AKYUREK, H., AGMA, A. and YASAR, S. (2005) Use of high levels of full-fat soybeans in laying hen diets. Journal of Applied Poultry Research 14: 32-37.Google Scholar
SERRANO, M.P., VALENCIA, D.G., MENDEZ, J. and MATEOS, G.G. (2012) Influence of feed form and source of soybean meal of the diet on growth performance of broilers from 1 to 32 days of age. Poultry Science 81: 2838-2844.Google Scholar
SHARMA, S., GOYAL, R. and BARWAL, S. (2013) Domestic processing effects on physicochemical, nutritional and anti-nutritional attributes in soybean (Glycine max L. Merill). International Food Research Journal 20: 3203-3209.Google Scholar
SHARMA, S., KAUR, M., GOYAL, R. and GILL, B.S. (2014) Physical characteristics and nutritional composition of some new soybean (Glycine max (L.) Merrill) genotypes. Journal of Food Science and Technology 51: 551-557.Google Scholar
SHI, S., LU, J., TONG, H., ZOU, J. and WANG, K. (2012) Effects of graded replacement of soybean meal by sunflower seed meal in laying hen diets on hen performance, egg quality, egg fatty acid composition, and cholesterol content. Journal of Applied Poultry Research 21: 367-374.Google Scholar
SINGH, P. (2008) Significance of phytic acid and supplemental phytase in chicken nutrition: A review. World's Poultry Science Journal 64: 553-580.Google Scholar
SOYA-TECH (2003) Whole soybeans as food ingredient. Available online: http://www.soyatech.com/pdf/wholesoyorder.pdf.Google Scholar
SRINATH, K., RAVINDER, R.V., KONDAL, R.K., MALLIKARJUNA, P.V.R., CHINNI, P.V. and REDDY, M.R. (2012) Effect of Supplementation of Cornsoya Pelleted Diets With Encapsulated Feed Enzymes on Performance of Broilers. International Journal of Food, Agriculture and Veterinary Science 2: 115-127.Google Scholar
STEIN, H.H., BERGER, L.L., DRACKLEY, J.K., FAHEY, J.RG., HERNOT, D.C. and PARSONS, C.M. (2008) Nutritional properties and feeding values of soybeans and their coproducts, in: JOHNSON, A., WHITE, P.J. & GALLOWAY, R. (Eds) Soybeans, Chemistry, Production, Processing, And Utilisation, pp. 613-660 (AOCS Press, Urbana, IL, USA).Google Scholar
VAN EYS, J., OFFNER, A. and BACH, A. (2004) Analysis. Manual of quality analysis for soybean products in the feed industry. Available online: http://www.asa-europe.org/Library/library_e.htm.Google Scholar
VAN HARN, J. and VELDKAMP, T. (2011) Pig MBM in broiler feed did not meet expectations. All about Feed 2: 24-26.Google Scholar
VIEIRA, S., OTT, R., BERRES, J., OLMOS, A., CONEGLIAN, J. and FREITAS, D. (2006) Effects of a mix of carbohydrases on live performance and carcass yield of broilers fed all vegetable diets based on corn and soybean meal. International Journal of Poultry Science 5: 662-665.Google Scholar
WILLIS, S. (2003) The use of soybean meal and full fat soybean meal by the animal feed industry. 12th Australian Soybean Conference, Toowomba, Australia 12: 1-8.Google Scholar
WOODWORTH, J., TOKASH, M., GOODBAND, R., NELSSEN, J., O'QUINN, P., KNABE, D. and SAID, N.I. (2001) Apparent ileal digestibility of amino acids and the digestible and metabolizable energy content of dry extruded-expelled soybean meal and its effect on growth performance of pigs. Journal of Animal Science 79: 1280-1287.Google Scholar
WOYENGO, T., SLOMINSKI, B. and JONES, R. (2010) Growth performance and nutrient utilisation of broiler chickens fed diets supplemented with phytase alone or in combination with citric acid and multicarbohydrase. Poultry Science 89: 2221-2229.Google Scholar
YADAV, J. and SAH, R. (2005) Supplementation of Corn-Soybean Based Broiler's Diets with Different Levels of Acid Protease. Journal of Institute of Agriculture and Animal Science 26: 65-70.Google Scholar
ZDUNCZYK, Z., JANKOWSKI, J., JUSKIEWICZ, J. and SLOMINSKI, B. (2011) Dietary Content and Gastrointestinal Function of Soybean Oligosaccharides in Monogastric Animals, in: TZI-BUN, N.G. (Ed) Soybean - Biochemistry, Chemistry and Physiology, pp. 523-540 (InTech).Google Scholar