The Use of Some Plant Extracts as Growth Promoter in Broiler Chickens

	The Use of Some Plant Extracts as Growth Promoter in Broiler Chickens
Journal of Tikrit University For Agriculture Sciences
Article 1, Volume 11, Issue 2, 2011, Pages 306-319
Abstract
A research study was conducted to determine the potential of aqueous extract of thyme and coriander as a natural growth promoter in broiler chickens. Five hundred and four of 3 weeks old broiler chicks(ROSS) raised from 3 to 6 weeks of age. The birds were distributed to 7 treatments groups with three replicates per treatment ( 12 males and 12 females per treatment). Aqueous extract of thyme or coriander was mixed at the rate 4 , 6 and 8% with water offered to treatments (2 , 3 and 4 ) and (5 , 6 and 7 ) for thyme and coriander respectively while treatment one served as control. Aqueous extracts of thyme or coriander was mixed at rate 4 , 6 and 8 % with drinking water offered to treatments ( 2 , 3 and 4 ) and ( 5 , 6 and 7 ) for thyme and coriander respectively while treatment one served as control . A significant increase of live body weight , weight gain , feed conversion and carcass yield was recorded for the broiler supplemented with thyme or coriander extract with lower abdominal fat pad when compared with control group. Beside broilers is non significant differences (p>0.05) regarding weight of giblet and dressing percentage .A significant increase(p<0.05) of hematocrit values , hemoglobin concentration , red blood cells , white blood cells count in croporating of thyme and coriander extract with control group(p<0.05) .Administration of thyme or coriander extract to the drinking water caused significant decline in blood serum levels of glucose , triglycerides and cholesterol .Finding of the research study indicated that groups receiving thyme or coriander infusion at the rate 6 and 8% of drinking water shown better growth performance.

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