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Effects of Cinnamon Extracts on Growth Performance and Excreta Urease Activity and Nitrogen Loss in Broilers

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Livestock Environment VIII, 31 August – 4 September 2008, Iguassu Falls, Brazil  701P0408.(doi:10.13031/2013.25517)
Authors:   Anguo Chen, Jinxin Xu, Caimei Yang, Qihua Hong
Keywords:   Broiler, Cinnamon extracts, Excreta nitrogen, Uric acid, Urease activity

This study was conducted with 360 one-day-old avian commercial broilers to determine the effects of dietary cinnamon extracts (CE) on growth performance and excreta urease activity and nitrogen loss. The broilers were divided equally into 4 treatments and each with 3 replicates, and received the same basal diets, which included a starter from 1 d to 21 d and then a grower until 42 d, both added CE at 0 (control), 150, 250 and 350 mg/kg, respectively. The excreta samples of trail birds were collected at the age of 14 d and 35 d for analysis of urease activity, total nitrogen (TN), uric acid (UA), urea nitrogen (UN) and ammonia nitrogen (AN). The broilers with CE added diets had significantly higher average daily gain (ADG) and lower feed gain ratio (F/G) in the whole 6-wk period compared with the control, respectively. The ADG of the 150, 250 and 350 mg/kg groups were increased by 7.35% (P<0.05), 20.18% (P<0.05), and 21.18% (P<0.05), and F/G were decreased by 1.19% (P>0.05), 3.17% (P<0.05), and 7.54% (P<0.05) during the whole period, respectively. The activities of urease in excretions from the birds fed CE containing diets, especially 250 mg/kg treatment lowered 23.5 % (P<0.05) relative to the control, were inhibited significantly during the late 3-wk phase. The losses of TN, UA, UN and AN in the excretions of CE-added treatments were slowed significantly from 12 h to 96 h relative to the control, respectively. These results indicate that adding 250 mg/kg of CE to broiler diets may significantly improve the growth performance and reduce excreta nitrogen loss mainly through ammonia emission.

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