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Xylanase supplementation improves the nutritive value of diets containing high levels of sorghum distillers' dried grains with solubles for broiler chickens
Author(s) -
Barekatain Mohammad Reza,
Choct Mingan,
Iji Paul A
Publication year - 2013
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.5992
Subject(s) - broiler , xylanase , starter , feed conversion ratio , gizzard , sorghum , food science , zoology , ileum , biology , chemistry , body weight , biochemistry , agronomy , enzyme , endocrinology
BACKGROUND An experiment was conducted to investigate the effect of sorghum distillers' dried grains with solubles ( sDDGS ) and xylanase supplementation in broiler chicken diets. A total of 432 Cobb‐500 day‐old male broiler chicks were used in a 4 × 2 factorial design (0, 100, 200 or 300 g kg −1 sDDGS with or without xylanase supplementation). Each treatment was replicated six times with nine birds per replicate in a 35 day study.RESULTS Feed intake was increased ( P < 0.001) throughout the study with the inclusion of dietary sDDGS . Body weight gain ( BWG ) was unaffected except for the last 2 weeks of study, when birds that received 200 and 300 g kg −1 sDDGS had higher ( P < 0.001) BWG . Feed conversion ratio ( FCR ) increased ( P < 0.05) as sDDGS in the diet rose to 100 g kg −1 during the starter phase and the whole period of study. Over the starter period, xylanase supplementation improved ( P < 0.05) FCR , particularly for the highest inclusion of sDDGS . Protein digestibility deteriorated ( P < 0.001) as sDDGS in the diet rose to 300 g kg −1 . Xylanase reduced ( P < 0.001) the concentration of xylose in the ileum of birds. The activities of sucrase and maltase in the jejunal mucosa were reduced when birds were offered 200 and 300 g kg −1 sDDGS . Incorporation of sDDGS increased ( P < 0.01) the total short‐chain fatty acid concentration in the caeca.CONCLUSION The results showed that diets containing large amounts of sDDGS will benefit from xylanase supplementation, particularly in terms of FCR . © 2012 Society of Chemical Industry