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Shea nut (Vitellaria paradoxa) meal as a feed ingredient for poultry

Published online by Cambridge University Press:  08 February 2008

H.K. DEI ,
S.P. ROSE  and
A.M. MACKENZIE
H.K. DEI*
Affiliation:
The National Institute of Poultry Husbandry, Harper Adams University College, Newport, Shropshire TF10 8NB, UK
S.P. ROSE
Affiliation:
The National Institute of Poultry Husbandry, Harper Adams University College, Newport, Shropshire TF10 8NB, UK
A.M. MACKENZIE
Affiliation:
The National Institute of Poultry Husbandry, Harper Adams University College, Newport, Shropshire TF10 8NB, UK
*
*Corresponding author: hkdei@yahoo.com
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Abstract

Shea nut (Vitellaria paradoxa, Gaertner or Butyrospermum parkii, Kotschy) meal, a solid residue from the shea fat industry, is available in large quantities in West Africa. The meal is now receiving increased attention as a potential feed ingredient for poultry due to the increased amounts that are available due to high demand for shea fat in cosmetics and as a cocoa butter substitute in chocolate. Studies have shown nutrient compositions (g/kg dry matter basis) of crude protein (80–250), ether extract (17–362), crude fibre (53–138), ash (33–76) and nitrogen-free extract (318–675); probably with the major part of the variability being due to the amount of fat extraction, handling of the nuts prior to processing, or seasonal effects on nut production. Anti-nutritive factors reported include saponins (3.0–30.0 g/kg), tannins (98.7–156.4 g/kg) and theobromine (4.5 g/kg), which may have detrimental effects on performance of poultry. However, it has been shown that fermentation (i.e. wet incubation of a feedstuff) has the potential to reduce the negative effects of some of these anti-nutritive factors. It is evident that shea nut meal has low nutritive value; therefore it requires further improvements before it can become useful for the poultry feed industry.

Keywords

shea nut mealnutritive valueanti-nutritive factorspoultryreview
Type
Research Article
Information
World's Poultry Science Journal , Volume 63 , Issue 4 , December 2007 , pp. 611 - 624
Copyright
Copyright © World's Poultry Science Association 2007

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References

ADEGBOLA, A.A. (1977) Utilisation of agro-industrial by-products in Africa. In: New Food Resources. Proceedings of a Technical Consultation held in Rome, 22–24 November 1976. FAO Animal Production and Health Paper, No. 4: 147–161.Google Scholar
ADEOGUN, W.O. (1989) Sheabutter cake as an ingredient in broiler chick rations. M.Sc. Thesis, Department of Animal Science, University of Ibadan, Nigeria.Google Scholar
ADU-AMPOMAH, Y., AMPONSAH, J.D. and YIDANA, J.A. (1995) Collecting germplasm of shea nut (Vitellaria paradoxa) in Ghana. Plant Genetic Resources Newsletter 102: 37–38.Google Scholar
AHMED, A.E., SMITHARD, R. and ELLIS, M. (1991) Activities of enzymes of the pancreas, and the lumen and mucosa of the small intestine in growing broiler cockerels fed tannin-containing diets. British Journal of Nutrition 65: 189–197.CrossRefGoogle ScholarPubMed
ANNONGU, A.A., TERMEULEN, U. and ATTEH, J.O. (1996a) Response of broilers to dietary treated and untreated sheabutter cake supplemented with molasses. Landbauforschung Volkenrode, Sonderheft 169: 295–300.Google Scholar
ANNONGU, A.A., TERMEULEN, U., ATTEH, J.O. and APATA, D.F. (1996b) Toxicological assessment of native and industrial fermented sheabutter cake in nutrition of broilers. Archiv fur Geflugelkunde 60: 221–226.Google Scholar
ANNONGU, A.A., TERMEULEN, U., ATTEH, J.O. and CHINNAH, T. (1996c) Biochemical and histological alterations in the liver of the broiler after ingestion of vegetable saponins and effects of dietary supplementation with adsorbents or methyl donor. Archiv fur Geflugelkunde 60 (6): 267–272.Google Scholar
ASSOCIATION OF OFFICIAL ANALYTICAL CHEMISTS, AOAC (1984) Official methods of analysis (14th Ed.). Association of Official Analytical Chemists, Washington, D.C.Google Scholar
ARMSTRONG, W.D., ROGLER, J.C. and FEATHERSTON, W.R. (1974) Effects of tannin extraction on the performance of chicks fed bird resistant sorghum grain diets. Poultry Science 53: 714–720.CrossRefGoogle Scholar
AYE, F.Y.O. and ADOMAKO, D. (1989) Processing of shea fruits. Cocoa Research Institute, Ghana, Annual Report 1987/1988: 104–105.Google Scholar
ATUAHENE, C.C., DONKOH, A. and ASANTE, F. (1998) Value of sheanut cake as a dietary ingredient for broiler chicken. Animal Feed Science and Technology 72: 133–142.CrossRefGoogle Scholar
BADIFU, G.I.O. (1989) Lipid composition of Nigerian Butyrospermum paradoxum kernel. Journal of Food Composition and Analysis 2(3): 238–244.CrossRefGoogle Scholar
BALLESTA, M.C., MANAS, M., MATAIX, F.J., MARTINEZ-VICTORIA, E. and SEQUER, I. (1990) Long-term adaptation of pancreatic response by dogs to dietary fats of different degrees of saturation: olive and sunflower oil. British Journal of Nutrition 64: 487–496.CrossRefGoogle ScholarPubMed
BHAT, T.K., SINGH, B. and SHARMA, O.P. (1998) Microbial degradation of tannins – A current perspective. Biodegradation 9: 343–357.CrossRefGoogle ScholarPubMed
BRINK, E.J., HADDERMAN, E., DE FOUW, N.J. and WESTSTRATE, J.A. (1995) Positional distribution of stearic acid and oleic acid in a triacyglycerol and dietary calcium concentration determines the apparent absorption of these fatty acids in rats. Journal of Nutrition 125: 2379–2387.CrossRefGoogle Scholar
BUSSON, I. (1965) Plantes alimentaires de l'Ouest Africain: étude botanique, bioloque et chemique, 568 pp., Leconte, Marseilles.Google Scholar
BUTLER, L.G. and ROGLER, J.C. (1992) Biochemical mechanisms of the anti-nutritional effects of tannins. American Chemical Society Symposium Series 506: 298–304.CrossRefGoogle Scholar
CAMPBELL, G.L., CLASSEN, H.L. and BALANCE, G.M. (1986) Gamma irradiation treatment of cereal grains for chick diets. Journal of Nutrition 116: 560–569.CrossRefGoogle ScholarPubMed
CAMPBELL, G.L., SOSULSKI, F.W., CLASSEN, H.L. and BALANCE, G.M. (1987) Nutritive value of irradiated and β-glucanase-treated wild oat groats (Avena fatua L.) for broiler chickens. Animal Feed Science and Technology 16: 243–252.CrossRefGoogle Scholar
CARRÉ, B. (2002) Carbohydrate chemistry of feedstuffs used for poultry. In: Poultry Feedstuffs: Supply, Composition and Nutritive Value (eds. McNab, J.M. and Boorman, K.N.). CAB International, UK, p. 39–56.CrossRefGoogle Scholar
CERA, K.R., MAHAN, D.C., CROSS, R.F., REINHART, G.A. and WHITMOYER, R.E. (1988) Effect of age, weaning and postweaning diet on small intestinal growth and jejunal morphology in young swine. Journal of Animal Science 66: 574–584.CrossRefGoogle ScholarPubMed
CHEEKE, P.R. (1971) Nutritional and physiological implication of saponins: a review. Canadian Journal of Science 51: 621–632.Google Scholar
CLARKE, E.G.C. and CLARKE, M.L. (1979) Veterinary Toxicology, p. 438. Bailliere Tindale, London.Google Scholar
CORTINAS, L., VILLVERDE, C., GALOBART, J., BAUCELLS, M.D., CODONY, R. and BARROETA, A.C. (2004) Fatty acid content in chicken thigh and breast as affected by dietary polyunsaturation level. Poultry Science 83: 1155–1164.CrossRefGoogle ScholarPubMed
DE BRUYNE, T., PIETERS, L., DEELSTRA, H. and VLIETINCK, A. (1999) Condensed vegetable tannins: biodiversity in structure and biological activities. Biochemical Systematics and Ecology 27: 445–459.CrossRefGoogle Scholar
DEI, H.K., ROSE, S.P. and MACKENZIE, A.M. (2006) Apparent metabolisable energy and digestibility of shea (Vitellaria paradoxa) fat, cocoa (Theobroma cacao) fat and soybean oil in broiler chicks. British Poultry Science 47: 1–6.CrossRefGoogle ScholarPubMed
DEI, H.K., ROSE, S.P. and MACKENZIE, A.M. (2007) Metabolisable energy of shea nut (Vitellaria paradoxa) meal for poultry. British Poultry Abstracts 3: 36–37.Google Scholar
DELAUDE, C. (1974) Chemical study of the aponins of Sapindacaea. Identification of the saponin of Radikofera calodendra. Bulletin of the Society off Research Scientists Liege 43: 693–696.Google Scholar
ELKIN, R.G. (2002) Nutritional components of feedstuffs: a qualitative chemical appraisal of protein. In: Poultry Feedstuffs: Supply, Composition and Nutritive Value (eds. McNab, J.M. and Boorman, K.N.). CAB International, UK. p. 57–86.CrossRefGoogle Scholar
FORD, J.E. and HEWITT, D. (1979) Protein quality in cereals and pulses. 3. Bioassays with rats and chickens on sorghum (Sorghum vulgare Pers.), barley and field beans (Vicia faba L.). Influence of polyethylene glycol on digestibility of the protein in high tannin grain. British Journal of Nutrition 43: 325–340.CrossRefGoogle Scholar
FRANCIS, G., KEREM, Z., MAKKER, H.P.S. and BECKER, K. (2002) The biological action of saponins in animal systems: a review. British Journal of Nutrition 88 (6): 587–605.CrossRefGoogle ScholarPubMed
FREEMAN, C.P. (1969) Properties of fatty acids in dispersions of emulsified lipid and bile salt and the significance of these properties in fat absorption in the pig and the sheep. British Journal of Nutrition 23: 249–263.CrossRefGoogle ScholarPubMed
GOHL, B. (1981) Tropical Feeds: feed information summaries and nutritive values. FAO Animal Production and Health Series, No. 12, 529 pp.Google Scholar
HAGERMAN, A.E. (1988) Extraction of tannins from fresh preserved leaves. Journal of Chemistry and Ecology 40: 453–461.CrossRefGoogle Scholar
HALL, J.B., AEBISCHER, D.P., TOMLINSON, H.F., OSEI-AMANING, E. and HINDLE, J.R. (1996) Vitellaria paradoxa: a monograph. School of Agricultural and Forest Sciences Publication No. 8, University of Wales, Bangor. 105 pp.Google Scholar
HARALAMPIDIS, K., TROJANOWSKA, M. and OSBOURN, A. (2002) Biosynthesis of triterpenoid saponins in plants. In: Advances in Biochemical Engineering/Biotechnology (Scheper, T. Ed.) 75: 31–47.Google Scholar
HURRELL, R.F. (1990) Influence of the Maillard Reaction on nutritional value of foods. In: The Maillard Reaction in foods processing, human nutrition and physiology, pp 245–358. Birkhauser Verlag, Basel, Switzerland.CrossRefGoogle Scholar
HUYGHEBAERT, G., DE MUNTER, G. and DE GROOTE, G. (1988) The metabolisable energy of fats for broilers in relation to their chemical composition. Animal Feed Science and Technology 20: 45–58.CrossRefGoogle Scholar
IJI, P.A., KHUMALO, K., SLIPPERS, S. and GOUS, R.M. (2004) Intestinal function and body growth of broiler chickens on maize-based diets supplemented with mimosa tannins and microbial enzyme. Journal of the Science of Food and Agriculture 84 (12): 1451–1458.CrossRefGoogle Scholar
INRA (2004) Tables of composition and nutritional value of feed materials, 2 ed. (Sauvant, D., Perez, J.M. and Tran, G. eds.), p. 186. Wageningen Academic Publishers, Netherlands.CrossRefGoogle Scholar
JENKINS, K.J. and ATWAL, A.S. (1994) Effects of dietary saponins on fecal bile acids and neutral sterols, and availability of vitamins A and E in the chick. Journal of Nutritional Biochemistry 5: 134–138.CrossRefGoogle Scholar
JOHNSON, I.T., GEE, J.M., PRICE, K.R., CURL, C. and FENWICK, G.R. (1986) Influence of saponins on gut permeability and active nutrient transport in vitro. Journal of Nutrition 116: 2270–2277.CrossRefGoogle ScholarPubMed
JONES, D.E. (1965) Banana tannin and its reaction with polyethylene glycol. Nature 206: 299–300.CrossRefGoogle Scholar
JONES, W.T. and MANGAN, J.L. (1977) Complexes of the condensed tannins of sainfoin (Orobrychis viciifolia Scop) with fraction 1 leaf protein and with submaxillary mucoprotein, and their reversal by polyethylene glycol and Ph. Journal of the Science of Food and Agriculture 28: 126–136.CrossRefGoogle Scholar
KERSHAW, S.J. and HARDWICK, J.F. (1981) Heterogeneity within commercial contract analysis samples of shea nut. Journal of the American Oil Chemists' Society 58: 706–710.CrossRefGoogle Scholar
KETELS, E. and DE GROOTE, G. (1989) Effect of ratio of unsaturated to saturated fatty acids of the dietary lipid fraction on utilisation and metabolisable energy of added fats in young chicks. Poultry Science 68: 1506–1512.CrossRefGoogle Scholar
KHALIL, A.H. and ELADAWY, T.A. (1994) Isolation, Identification and toxicity of saponin from different legumes. Food Chemistry 50 (2): 197–201.CrossRefGoogle Scholar
KUMAR, R. and SINGH, M. (1984) Tannins: Their adverse role in ruminant nutrition. Journal of Agricultural Food Chemistry 32: 447–453.CrossRefGoogle Scholar
LANDAU, S., XUE, B., DVASH, L., FRIEDMAN, S. and MABJEESH, S.J. (2003) Polyethylene glycol, used to alleviate the negative effects of dietary tannins, can also serve as a marker of fecal output in goats. Small Ruminant Research 48: 37–43.CrossRefGoogle Scholar
LAZANI, A., BONDIOLI, P., CAMURATI, F., CARDILLO, M., GASPAROLI, A., MARIANI, C. and FEDELI, E. (1984) Integral technology of fat extraction and meal production from sheanuts. Rivista italiana delle sostanze grasse 61: 375–383.Google Scholar
LEAKEY, R.R.B. (1999) Potential for novel food products from agroforestry trees: a review. Food Chemistry 66: 1–14.CrossRefGoogle Scholar
LIPP, M. and ANKLAM, E. (1998) Review of cocoa butter and alternative fats for use in chocolate-Part A. Compositional data. Food Chemistry 62: 73–97.CrossRefGoogle Scholar
LONGSTAFF, M. and MCNAB, J.M. (1991) The inhibitory effects of hull polysaccharides and tannins of field beans (Vicia faba L.) on the digestion of amino acids, starch and lipids and on digestive enzyme activities in young chicks. British Journal of Nutrition 65: 199–216.CrossRefGoogle Scholar
LOSZNER, G. (1986) Die Bedeutung der sheabutter als Nahrungsmittel und Industrierohstoff. Beiträge zur Tropischen landwirtschaft und Veterinärmedizin 24 (1): 29–34.Google Scholar
MACHAIAH, J.P., PEDNEKAR, M.D. and THOMAS, P. (1999) Reduction in flatulence factors in mung bean (Vigna radiate) using low-dose “/-irradiation. Journal of the Science of Food and Agriculture 79: 648–652.3.0.CO;2-B>CrossRefGoogle Scholar
MAHMOOD, S., KHAN, M.A., SARWAR, M. and NISA, M. (2006) Chemical treatments to reduce antinutritional factors in salseed (Shorea robusta) meal: Effect of nutrient digestibility in colostomized hens and intact broilers. Poultry Science 85: 2207–2215.CrossRefGoogle ScholarPubMed
MARSMAN, G.J., GRUPPEN, H., VAN DER POEL, A.F. and LIENER, J.E. (1997) The effect of thermal processing and enzyme treatments of soybean meal on growth performance, ileal nutrient digestibilities, and chime characteristics in broiler chicks. Poultry Science 76: 864–872.CrossRefGoogle Scholar
MATTSON, F.H., NOLEN, G.A. and WEBB, M.R. (1979) The absorbability by rats of various triglycerides of stearic and oleic acid and the effect of dietary calcium and magnesium. Journal of Nutrition 109: 1682–1687.CrossRefGoogle ScholarPubMed
MCDONALD, P., EDWARDS, R.A., GREENHALGH, J.F.D. and MORGAN, C.A. (1995) Animal Nutrition, 5th edition, p. 546–552. Pearson Education Ltd, Essex, UK.Google Scholar
MILGATE, J. and ROBERTS, D.C.K. (1995) The nutritional and biological significance of saponins. Nutrition Research 15 (8): 1223–1249.CrossRefGoogle Scholar
MORGAN, B. and TRINDER, H. (1980) The composition and nutritional value of some tropical and sub-tropical by-products. British Society of Animal Production Occasional Paper 3: 91–111.Google Scholar
NELSON, T.S., STEPHENSON, E.L., BURGOS, A., FLOYD, J. and YORK, J.O. (1975) Effect of tannin content and dry matter on energy utilisation and average amino acid availability of hybrid sorghum grains. Poultry Science 54: 1620–1623.CrossRefGoogle Scholar
NISSENIN, V.J., PEISKER, M. and LIEBERT, F. (1993) Feed treatment and enzyme addition in poultry feeds (in German). Kraftfutter 9: 364–367.Google Scholar
OCKNER, R.K., PITTMAN, J.P. and YAGER, J.L. (1972) Differences in the intestinal absorption saturated and unsaturated fatty acids. Gastroenterology 62: 981–992.CrossRefGoogle Scholar
OKAI, B.D. and BONSI, M.K.L. (1989) Sheanut cake as a substitute for maize in the diets of growing gilts. Journal of the University of Science and Technology 9: 45–50.Google Scholar
OKAI, D.B. (1990) Seedcake tried in Ghana. Pig International 20: 28.Google Scholar
OKAI, D.B., TOPPS, J.H., ENGLISH, P. and TUAH, A.K. (1994) The growth performance and organ characteristics of rats fed diets containing sheanut cake (SNC) and groundnut skins (GNS). Ghana Journal of Biochemistry, Biotechnology and Molecular Biology 2: 37–43.Google Scholar
OKAI, D.B., TOPPS, J.H., ENGLISH, P., TUAH, A.K. and OSAFO, E.L.K. (1995) The effects of processed sheanut cake and groundnut skins on the growth performance and organ characteristics of rats. Ghana Journal of Biochemistry, Biotechnology and Molecular Biology 3: 76–82.Google Scholar
OLESZEK, W., NOWACKA, J., GEE, J.M., WORTLEY, G. and JOHNSON, I.T. (1994) Effects of some purified alfafa (Medicago sativa) saponins on transmural potential difference in mammalian small intestine. Journal of the Science of Food and Agriculture 65: 35–39.CrossRefGoogle Scholar
OLOREDE, B.R. and LONGE, O.G. (1999) Growth, Nutrient retention, haematology and serum chemistry of pullet chicks fed shea butter cake in the humid tropics. Archive of Zootechnology 49: 441–444.Google Scholar
OLOREDE, B.R., LONGE, O.G. and BABANTUNDE, G.M. (1999) Growth performance, organs measurement and economics of production of broiler chickens fed a high shea butter cake diet supplemented with fish meal or groundnut cake. International Journal of Animal Science 14: 203–207.Google Scholar
OSEI-AMANING, E. (1993) Shea nut expeller cake utilisation: integrated livestock shea nut farming experiment. Cocoa Research Institute, Ghana, Annual Report 1989/1990: 148.Google Scholar
OWUSU-DOMFEH, K. (1972) The future of cocoa and its by-products in feeding livestocks. Ghana Journal of Agricultural Science 5: 57–63.Google Scholar
PARSONS, CM., HATSIMOTO, K., WEDEKING, K.J., HAN, Y. and BAKER, D.H. (1992) Effect of overprocessing on availability of amino acids and energy in soya bean meal. Poultry Science 71: 133–140.CrossRefGoogle Scholar
PECKHAM, M.C. (1984) Poisons and toxins. In: Hofstad, M.S., Barnes, H.J., Calnek, B.W., Reid, W.M. and Yoder, H.W. Jr., Diseases of poultry, 8th ed., pp. 783–818. Iowa State University Press, Ames, Iowa, USA.Google Scholar
PLAVNIK, I. and SKLAN, D. (1995) Nutritional effects of expansion and short time extrusion on feeds for broilers. Animal Feed Science and Technology 55: 247–251.CrossRefGoogle Scholar
POTTER, S.M., JIMENEZ-FLORES, R., POLLACK, J., LONE, T.A. and BERBER-JIMENEZ, M.D. (1993) Protein saponin interaction and its influence on blood lipids. Journal of Agricultural and Food Chemistry 41: 1287–1291.CrossRefGoogle Scholar
PRICE, M.L., BUTLER, L.G., FEATHERSTON, W.R. and ROGLER, J.C. (1978) Detoxification of high tannin sorghum grain. Nutrition Report International 17: 229–238.Google Scholar
PRICE, K.R., JOHNSON, I.T. and FENWICK, G.R. (1987) The chemistry and biological significance of saponins in foods and feedstuffs. CRC Critical Reviews in Food Science and Nutrition 26: 27–135.CrossRefGoogle Scholar
REDDY, N.R. and PIERSON, M.D. (1994) Reduction in antinutritional and toxic components in plant foods by fermentation. Food Research International 27: 281–290.CrossRefGoogle Scholar
REED, J.D., HORVATH, P.J., ALLEN, M.S. and VAN SOEST, P.J. (1985) Gravimetric determination of soluble phenolics including tannins from leaves by precipitation with trivalent ytterbium. Journal of the Science of Food and Agriculture 36: 255–261.CrossRefGoogle Scholar
REICHERT, R.D., FLEMING, E.S. and SCHWAB, D.J. (1980) Tannin deactivation and nutritional improvement of sorghum by anaerobic storage of H2O, HCL, NaOH-treated grain. Journal of Agricultural and Food Chemistry 28: 824–829.CrossRefGoogle ScholarPubMed
RHULE, S.W.A. (1995) Evaluation of sheanut cake as feedstuff for pigs in Ghana.1. Growth rate and carcass characteristics of pigs fed diets containing varying levels of sheanut cake. Legon Agricultural and Extension Journal 4: 41–47.Google Scholar
RHULE, S.W.A. (1999) Performance of pigs on diets containing detoxified sheanut cake. Tropical Animal Health and Production 31: 45–53.CrossRefGoogle ScholarPubMed
ROSTAGNO, H.S., ROGLER, J.C. and FEATHERSTON, W.R. (1973) Studies on the nutritional value of sorghum grains with varying tannin contents for chicks: Amino acid digestibility studies. Poultry Science 52: 772–778.CrossRefGoogle Scholar
SAWADOGO, K. and BEZARD, J. (1982) Etude de la structure glyceridique du beurre de karaté. Oléagineux 37 (2): 69–74.Google Scholar
SHIMOYAMADA, M., IKEDO, S., OOTSUBO, R. and WATANABE, K. (1998) Effects of soybean saponins on chymotryptic hydrolyses of soybean proteins. Journal of Agricultural and Food Chemistry 46: 4793–4797.CrossRefGoogle Scholar
SIDDHURAJU, P., OSONIYI, O., MAKKAR, H.P.S. and BECKER, K. (2002) Effect of soaking and ionising radiation on various antinutritional factors of seeds from different species of an unconventional legume, Sesbania and common legume, green gram (Vigna radiata). Food Chemistry 79: 273–281.CrossRefGoogle Scholar
SILANIKOVE, N., PEREVOLOSKY, A. and PROVENZA, F.D. (2001) Use of tannin-binding chemicals to assay for tannins and their negative postingestive effects in ruminants. Animal Feed Science and Technology 91: 69–81.CrossRefGoogle Scholar
SILVERSIDES, F.G. and BEDFORD, M.R. (1999) Soluble non-starch polysaccharides, enzymes, and gut viscosity – Is there a connection? World Poultry 15 (3): 17–18.Google Scholar
SIM, J.S., KITTS, W.D. and BRAGG, D.B. (1984) Effect of dietary saponin on egg cholesterol level and laying hen performance. Canadian Journal of Animal Science 64: 977–984.CrossRefGoogle Scholar
SMULIKOWSKA, S., PASTUSZEWSKA, B., SWIECH, E., OCHTABINSKA, A., MIECZKOWSKA, A., NGUYEN, V.C. and BURACZEWSKA, K. (2001) Tannin content affects negatively nutritive value of pea for monogastrics. Journal of Animal and Feed Sciences 10 (3): 511–523.CrossRefGoogle Scholar
SPARG, S.G., LIGHT, M.E. and VAN STADEN, (2004) Biological activities and distribution of plant saponins. Journal of Ethnopharmacology 94: 219–243.CrossRefGoogle ScholarPubMed
STRACHAN, T.R. and BENNETTI, A. (1994) Theobromine poisoning in dogs. Veterinary Record 134: 284–289.CrossRefGoogle ScholarPubMed
TANO-DEBRAH, K. and OHTA, Y. (1994) Enzyme-assisted aqueous extraction of fat from kernels of the shea tree, Butyrospermum parkii. Journal of the American Oil Chemists'Society 71(9): 979–983.CrossRefGoogle Scholar
TERAPUNDUWAT, S. and TASAKI, I. (1986) Effect of dietary saponin on the performance and plasma cholesterol level of chicks and the alleviation of saponin toxicity by cholesterol supplementation. Japanese Journal of Zootechnical Science 57: 524–533.Google Scholar
TREASE, G.E. and EVANS, W.C. (1972) Pharmacognosy, 10th edition, pp. 502. Bailliere Tindall, London.Google Scholar
TREVINO, J., ORTIZ, L. and CENTENO, C. (1992) Effect of tannins from Faba beans (Vicia faba) on the digestion of starch by growing chicks. Animal Feed Science and Technology 37: 345–349.CrossRefGoogle Scholar
VILA, B. and ESTEVE-GARCIA, E. (1996) Studies on acid oils and fatty acids for chickens. II. Effect of free fatty acid content and degree of saturation of free fatty acids and neutral fat on fatty acid digestibility. British Poultry Science 37: 119–130.CrossRefGoogle ScholarPubMed
WATANABE, M., SUMIDA, N., YANAI, K. and MURAKAMI, T. (2004) A novel saponin hydrolase from Neocosmopora vasinfecta var. vasinfecta. Applied and Environmental Microbiology 70 (2): 865–872.CrossRefGoogle Scholar
WILLIAMS, P.E.V., GERAERT, P.A., UZU, G. and ANNISON, G. (1997) Factors affecting non-starch polysaccharide digestibility in poultry. In: Morand-Fehr, P. (ed.). Feed manufacturing in Southern Europe: New challenges, p. 125–134. CIHEAM-IAMZ, Zaragoza.Google Scholar
WISEMAN, J., COLE, D.J.A., PERRY, F.G., VERNON, B.G. and COOKE, B.C. (1986) Apparent metabolisable energy values of fats for broiler chicks. British Poultry Science 27: 561–576.CrossRefGoogle ScholarPubMed
WISEMAN, J. and SALVADOR, F. (1991) The influence of free fatty acid content and degree of saturation on the apparent metabolisable energy value of fats fed to broilers. Poultry Science 70: 573–582.CrossRefGoogle Scholar
WOMENI, H.M., KAMGA, R., TCHIEGANG, C. and KAPSEU, C. (2002) Extraction du beurre de karaté: influence du séchage des amandes et de la technique d'extraction. Rivista Italiana delle Sostanze Grasse 79(1/2): 33–37.Google Scholar
WUBBEN, J.P., PRICE, K.R., DANIELS, M.J. and OSBOURN, A.E. (1996) Detoxification of oat leaf saponins by Septoria avenae. Phytopathology 86 (9): 986–992.CrossRefGoogle Scholar
YOSIOKA, I., FUJIO, M., OSAMURA, M. and KITAGAWA, I. (1966) A novel cleavage method of saponin with soil bacteria intending to the genuine sapogenin on Senega and Parax saponins. Tetrahedron Letters 50: 6303–6308.CrossRefGoogle Scholar
ZANELLA, I., SAKOMURA, N.K., SILVERSIDES, F.G., FIQUEIDO, A. and PACK, M. (1999) Effect of enzyme supplementation of broiler diets based on corn and soybeans. Poultry Science 78: 561–568.CrossRefGoogle ScholarPubMed
ZOLLITSCH, W., KNAUS, W., AICHINGER, F. and LETTNER, F. (1997) Effects of different dietary fat sources on performance and carcass characteristics of broilers. Animal Feed Science and Technology 66 (1/4): 63–73.CrossRefGoogle Scholar