Document Type : Research Paper

Authors

1 Lecturer and researcher Agricultural and Natural Resources Research and Training Center Khorasan Razavi

2 گروه علوم دامی

3 گروه تحقیق و توسعه

4 عضو گروه تحقیق و توسعه

Abstract

The effect of heat processing of wheat grains and enzyme supplementation on its apparent metabolizable energy (AME) and digestibility of protein and dry matter as well as the effect of their use in the diet on the growth performance, jejunum morphology and microbial population of ileum were investigated. For this purpose, 480 broiler chickens in a 4×2 factorial experiment with three levels of heat processing of wheat at 55, 70 and 85 °C for 2.5 minutes (with one treatment without thermal processing) and Rovabio enzyme (0 and 500 g/ton of diet) was used in a completely randomized design with eight treatments, six replicates of 10 birds each at the age of 25-42 days. Heat processing of wheat at 55 and 85 °C increased its AME compared to unprocessed treatment; So that the AME of processed wheat at 85 °C was 2.49% higher than unprocessed wheat (P<0.05). Enzyme supplementation significantly increased the AME of wheat (P < 0.05). Wheat processing at all three temperatures reduced the height of jejunum villi compared to the unprocessed group (P < 0.01). Also, processing of wheat at 70 and 85 °C increased the population of lactobacilli compared to treatment without processing (P = 0.05). The use of enzyme in the diet reduced the feed intake of the birds and the height of jejunal villi (P<0.05). Overall,, enzyme supplementation and heat processing of wheat improve its AME but have no remarkable effect on the growth performance of broiler chickens.

Keywords

  1. Abdollahi M (2011) Influence of feed processing on the performance, nutrient utilization and gut development of poultry and feed quality. A thesis presented in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Poultry Nutrition.
  2. Abdollahi MR, Ravindran V, Wester TJ, Ravindran G and Thomas DV (2011) Influence of feed form and conditioning temperature on performance, apparent metabolisable energy and ileal digestibility of starch and nitrogen in broiler starters fed wheat-based diet. Animal Feed Science and Technology, 168: 88-99.
  3. Amuzmehr A (2007) Effect of different levels of raw and processing rice bran on performance of broiler chicks. Master’s Degree in Animal Sciences and natural Resources of Gorgan University, 1(2): 85-98. (In Persian)
  4. AOAC (2005) Association of official analytical chemists, official methods of analysis. 18th(Ed). Maryland, USA.
  5. Aviagen (2014) Nutrition Specifications Manual: Ross 308. Aviagen Ltd., Scotland, UK.
  6. Bennett CD, Classen HL and Riddell C (2002) Feeding broiler chickens wheat and barley diets containing whole, ground and pelleted grain. Poultry Science, 81: 995-1003.
  7. Carre B, Idi A, Maisonnier S, Melcion JP, Oury FX, Gomez J and Pluchard P (2002) Relationships between digestibilities of food components and characteristics of wheats (Triticum-Astivum) introduced as the only cereal source in a broiler chicken diet. British Poultry Science, 43: 404-415.
  8. Choct M (1999) Soluble non-starch polysaccharides affect net utilization of energy by chickens. Recent Advances in Animal Nutrition. University of Armdale, Nsw. 31-35.
  9. Farhadi A, Sayyahzadeh H and Jafarbavari A (2008) Effect of Enzyme on diet and Corn, Wheat and Barley on yield and carcass traits of broiler chickens. Journal of Agriculture Science and Natural Resources, 16: 153-167. (In Persian)
  10. Ghobadi, Z., A. Karimi. 2012. Effect of feed processing and enzyme supplementation of wheat-based diets on performance of broiler chicks. Journal of Applied Animal Research, 40: 260-266.
  11. Gonza´lez-Alvarado JM, Jime´nez-Moreno ER, La´zaro and Mateos GG (2007) Effect of type of cereal, heat processing of the cereal and inclusion of fiber in the diet on productive performance and digestive traits of broilers. Poultry Science, 86: 1705-1715.
  12. Iji PA, Hughes RJ, Choct M and Tivey DR (2001) Intestinal structure and function of broiler chickens on wheat-based diets supplemented with a microbial enzyme. Asian-Australasian Journal of Animal Science, 14: 54-60.
  13. Kiarie E, Romero LF, Ravindran V (2014) Growth performance, nutrient utilization, and digesta characteristics in broiler chickens fed corn or wheat diets without or with supplemental xylanase. Poultry Science, 93: 1186-1196.
  14. Pickford J R (1992) Effect of processing on the stability of heat labile nutrients in animal feeds. International Information System for the Agriculture Science and Technology, 177-192.
  15. Ravindran V, Tilman ZV, Morel PCH, Ravindran G and Coles GD (2007) Influence of β-glucanase supplementation on the metabolisable energy and ileal nutrient digestibility of normal starch and waxy barleys for broiler chickens. Animal Feed Science and Technology, 134: 45-55.
  16. Rezaeipour V, Hasanpour M, Janitabar M and Abdullahpour R (2017) Effects of two native Iranian wheat cultivars, processing method, and enzyme supplementation on performance, carcass, intestinal morphology and microbiota activity in broiler chickens. Journal of Applied Animal Research, 45: 517-523. (In Persian)
  17. SAS Institute Inc (2004) User’s guide, version 9.1. Cary, NC: SAS Institute Inc.
  18. Seifi S (2013) An investigation of the effects of using an enzyme-probiotic combination on broilers performance. Iranian Journal of veterinary Medicine, 7: 299-304.
  19. Silversides FG and Bedford MR (1999) Effect of pelleting temperature on the recovery and efficacy of a xylanase enzyme in wheat-based diets. Poultry Science, 78: 1184-1190.
  20. Wiseman J (2000) Correlation between physical measurements and dietary energy values of wheat for poultry and pigs. Animal Feed Science Technology, 84: 1-11.
  21. Yaghobfar A, Ila, N, Deghan M and Kucheki A (2014) The effect of cell wall cell carbohydrates in wheat and bran in diets with and without Enzyme activity on serum and intestinal enzymes, volatile fatty acids, morphology And bacterial population of broiler Animal Science Journal, 107: 253-268.
  22. Yaghobfar A, S. Sharifi D and Golestani G (2014) Effects Natozyme enzyme plus on metabolizable energy and protein digestibility of diets containing wheat and rapeseed meal in broiler chickens. Animal production research, 5(10) (In Persian).