Effect of Lemon grass Essential oil (Cymbopogon Citratus Stapf) and Ylang Ylang Essential oil (Cananga odorata) application on carcass composition of broilers raised under hot and humid chicken shed ฐิตาภรณ์ คงดี พัชรา ธนานุรักษ์ ชนณภัส หัตถกรรม ธันวา ไวยบท และ ชาญวิทย์ วัชรพุกก์

Abstract

The objective were to measure carcass  composition and heat tolerating ability of 1,280 hybrid broilers (C.P.707) which were used in Factorial 2x4x4 in a completely randomized design (CRD) of Lemon grass Essential oil (Cymbopogon Citratus Stapf) and Ylang Ylang Essential oil (Cananga odorata) on the carcass composition of hybrid broilers under the chicken house in a hot and humid environment. Feed mixing - each essential oil type was mixed into feed at 0, 0.02, 0.04 and 0.06% and fed to the broilers and/or spraying - each essential oil at the same level was sprayed on the broilers for 1 minute each day, turned on automatically at 14:00 p.m. daily. The study was carried out at Chainat College of Agriculture and Technology, Chainat Province, Thailand. It can be seen that the black globe external temperatures (BG_Ext, 41.24±5.19 ^oC) were significantly (P<0.01) higher than the black globe internal temperatures (BG_Int, 34.41±3.48 ^oC). The results demonstrate the effect of solar radiation on ambient temperature and there are significant interactions between physiological parameters {RT (P<0.01), SknT₁₂ (P<0.01) and SknT₁₄ (P<0.05)} of Essential oils (EOs) and Mixing rate (M).Broiler groups that received lemon grass (E_LG) EOs had carcass, heart , pancreas and spleen weights that were significantly higher {(P<0.05), (P<0.05), (P<0.01) and (P<0.01), respectively} than  received ylang-ylang (E_YL) EOs. In relation to the effects of spraying (S) EOs onto the broilers, it was found that the weight (g.) of the hearts of the broilers receiving 0.04% (S₃, 13.69 ± 1.05) concentration spray was significantly (P<0.05) higher than those that received 0.06% (S₄, 10.69 ± 0.73) concentration spray. Both heart weights of (S₃) and (S₄) were not statistically different from the heart weights of 0% (S₁) and 0.02% (S₂). While the liver weight of (S₂, 66.56 ± 2.53) was significantly (P<0.01) higher than that of (S₄, 55.94 ± 2.25), both (S₄) and (S₂) were not significantly different from (S₁) and (S₂). It was concluded that administration of lemon grass and ylang-ylang via Essential Oils (EOs) did not enhance the heat tolerating ability of broilers raised in a hot-wet environment. However, it was found that the weight related to the carcass composition of broiler was significantly increased (P< 0.05).