Replacement Value of Soybean Meal with Rapeseed Meal Supplemented with or Without a Dietary NSP-Dgrading Enzyme on Performance, Carcass Traits and Thyroid Hormones of Broiler Chickens


	International Journal of Poultry Science
	Year: 2006 \| Volume: 5 \| Issue: 10 \| Page No.: 932-937 DOI: 10.3923/ijps.2006.932.937

Replacement Value of Soybean Meal with Rapeseed Meal Supplemented with or Without a Dietary NSP-Dgrading Enzyme on Performance, Carcass Traits and Thyroid Hormones of Broiler Chickens

H. Kermanshahi and A.R. Abbasi Pour

Abstract: In a completely randomized design with 3*3 factorial arrangements and 4 replicates, 432 day-old Cobb male broiler chickens were used to evaluate the replacement of soybean meal with local grown rapeseed meal in the diet of broiler chickens with or without a dietary NSP degrading enzyme. The rapeseed meal was replaced with soybean meal at the levels of 0 (control), 15 and 30 percent for 6 weeks. The enzyme levels added to the diets were 0 (control), 0.025% and 0.050%. Feed intake, body weight gain and feed conversion ratio were adversely affected by added levels of rapeseed meal during the starter (0-21 d), grower (21-42 d) and overall feeding periods (P< 0.0001). Adding 0.025% enzyme significantly (0.004) improved body weight gain at starter period. The interactions between rapeseed and enzyme for body weight gain were significant in all periods (P< 0.001). Feed conversion ratio was not significantly affected by adding enzyme into the diets. Added levels of rapeseed meal significantly increased the weights of liver, proventriculus, gizzard (P< 0.0001) and abdominal fat pad (P< 0.028). Adding levels of rapeseed meal were also significantly increased the concentration of serum triiodothyronine (T₃) at 42 days of age (P< 0.002) while adding enzyme into the diets had no significant effect among treatments . Therefore under the conditions of this study, use of lower levels of rapeseed meal might be more practical in broiler diets. For higher levels of replacement, further investigations are required.

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How to cite this article:

H. Kermanshahi and A.R. Abbasi Pour , 2006. Replacement Value of Soybean Meal with Rapeseed Meal Supplemented with or Without a Dietary NSP-Dgrading Enzyme on Performance, Carcass Traits and Thyroid Hormones of Broiler Chickens . International Journal of Poultry Science, 5: 932-937.

DOI: 10.3923/ijps.2006.932.937

URL: https://scialert.net/abstract/?doi=ijps.2006.932.937

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