Effect of enzyme supplementation on the performance of broilers fed maize, wheat, barley or micronized dehulled barley diets

Abstract

The effects of an enzyme preparation on the performance and carcass characteristics of broilers fed diets based on maize, wheat, hulled barley (Bedford) or micronized dehulled barley (MDB) {Bedford) diets were evaluated. A commercial enzyme containing (3-glucanase and xylanase was used. One thousand and nine hundred-twenty one-day-old broiler were used for this study. The broilers fed the MDB diets had a lower average daily gain (ADG) (PO.05) and lower average daily feed intake (ADFI) (PO.05) than the broilers fed the other diets. There was a significant period x grain interaction (PO.05) for ADG with the broilers on the barley diets performing better in the grower phase. The broilers received enzymes showed an enzyme x period interaction with the feed conversion rate (FCR) of those birds in the starter phase doing better (PO.05) than in the grower phase compared to those fed the unsupplemented diets. The birds fed MDB diets had higher digesta viscosity than birds fed unprocessed barley, maize or wheat diets (PO.01). Feed enzyme addition to the MDB diet caused a decrease (PO.01) in the digesta viscosity by 49% and an improvement (PO.05) feed conversion ratio (FCR) both for the starter and the grower phase.

Effect of Non-Starch Polysaccharide (NSP) of Wheat and Barley Supplemented with Exogenous Enzyme Blend on Growth Performance, Gut Microbial, Pancreatic Enzyme Activities, Expression of Glucose Transporter (SGLT1) and Mucin Producer (MUC2) Genes of Broiler Chickens

“…The present research has consistently elicited the negative effects of soluble NSP of wheat and barley, as also demonstrated by other researchers (Yin et al, 2000;Olukosi et al, 2007;Mirzaie et al, 2012). However, the comparative effects of different types of NSP on broiler performance and physiological responses have not been adequately cleared.…”

“…These results are consistent with previous reports. (Yin et al, 2000;Choct et al, 2006;Mirzaie et al, 2012). Digest NSP of wheat and barley by carbohydrases has been successful and promising in broilers (Olukosi et al, 2007;Slominski, 2011).…”

“…The major portion of NSP in wheat is arabinoxylan polymers, whereas NSP in barley are polymers of (1→3) (1→4)-β-glucans (Choct 1997;Yin et al 2000;Jamroz et al 2002). A review of literature indicates that the presence of anti-nutritive compounds in the digestive tract of birds, cause predominant negative changes in the gut such as increasing the product shelf life, physicochemical properties of digesta (viscosity and pH), and impede the action of indigenous enzymes through the gut (Choct & Annison, 1992 a,b;Hetland et al, 2004), along with some changes in the intestinal environment and structure of the lining surface with the impact on the quantity and quality of relevant gene expression (Ferraris, 2001;Smirnov et al, 2004;Tanabe et al, 2005).…”

Effects of non-starch polysaccharides enzymes on pancreatic and small intestinal digestive enzyme activities in piglet fed diets containing high amounts of barley

“…Numerous researchers have reported increased growth and improved feed conversion ratio as a consequence of NSP enzymes inclusion in animal diets based on barley, especially for poultry [19][20][21][22] . Effects of exogenous enzymes on growth performance for swine have been variable.…”

Animal Model Show Physiological Characteristics Can Alter by Feeding of Different Cereal Type and Exogenous Multi-Enzyme

“…The content and structure of NSP polymers vary between different grains, which consequently affect their nutritive value and anti-nutritional impacts [17]. The major part of NSPs of wheat is constituted by arabinoxylan polymers, whereas NSPs in barley comprises polymers of β-glucans [3,7,24]. A review of literature indicates that a complex blend of exogenous multienzyme is required to degrade the NSPs present in the diet in order to obtain satisfactory health, performance and nutrient digestibility through the gut [11,17,18,22].…”