Effects of dietary n-3 polyunsaturated fatty acids and ... - FINS

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1 st WorkshopXIII International Feed Technology SymposiumAs it can be seen on Fig. 1. dietary supplementation of essential oil and probiotic did notinfluenced average bird body weight after starter diet. At the end of trail body weight ofbirds from control group was the lowest. Body weight of chickens fed diet supplementedwith essential oil improved for 13%, and with probiotic 9%, in relation to control group.Jang et al. 3 reported higher, but not statistically significant higher, final body weightof birds fed diet supplemented with essential oil for 2.5% comparing to control group(basal diet), and 5.5 % regarding the group fed with antibiotics. Higher body weight inbirds fed with probiotic, comparing to the control, after 21 day (6.9%) and at the end oftrail (16.35%) reported Savkovic et al. 7 , and also increment of 11% in paper ofSavkovic et al. 8 . Also, according to results of Savkovic 11 broilers fed diets fortifiedwith probiotics (0,1%) had higher body weight (13,88%), than control group (dietswithout additives).Daily gain (g)4-6 week,finisher diets0-3 week,starter diets0 10 20 30 40 50 60 70 80Fig. 2. Average daily gain (g) of chickens from experimental groupsAccording to the results shown in Fig. 2 there were only slit differences in average dailygain among experimental groups after 3 rd week of experiment. Average daily gain, inthis period, ranged between 31.22 and 31.85 g. With regard to the second feeding periodduring which chickens received finisher diets, the differences were more notable.Highest daily gain was for the chickens from the experimental group O (72.24 g), andlowest for control group (60.48 g). Jang et al. 3 reported not significantly different intotal gain among basic and essential oil fortified dietary treatment groups. Positiveeffects diets supplemented with probiotics on body weight gain, were obtained inexperiments of Milosevic 4 , Savkovic et al., 5,8 , and Savkovic and Tojagic 6 .Published data indicate that broiler feed supplemented with probiotics in concentrationof 0,1% and 0,2% rise average daily weight gain for 22.02% and 24.32% respectivelycomparing to control group (diet without additives), and for 16.3% and 18.6%comparing to group fed diets with antibiotics 10 .(g)group C group O group P321
kg feed/kg body weignt1 st WorkshopXIII International Feed Technology SymposiumFeed conversion efficiency2,11,91,71,51,31,10,90,70,50-3 week, starterdiets4-6 week, finisherdietsaverage during trialgroup C group O group PFig. 3. Feed conversion efficiency of chickens from experimental groupsDifferences in feed conversion efficiency among experimental groups can be seen onFig. 3. Chickens from the experimental groups O and P had very similar feed intake(average during trial) for a kilo of weight gain, 1.6 and 1.62, respectively, what wasapproximately 14 % lower in relation to control group.CONCLUSIONAccording to the results feed supplementation with commercial essential oil or probiotichad positive effects on broiler growth performances. At the end of the trail the bodyweight of chickens fed supplemented diets was improved for 13% and 9% for theexperimental group O and P, respectively. Birds from the experimental group O and Phad lower feed intake for a kilo of weight gain in relation to control group. The usage ofessential oils and probiotics in feed supplementation, as antibiotics replacements, arealso justified from the healthy food production and environmental standpoint.ACKNOWLEDGEMENTSThis study was supported by the Ministry of Science and Technological Development ofthe Republic of Serbia, Project No. TR20066.This research is part of the Project No. 114-451-00645/2009-01 which is financiallysupported by the Provincial Secretariat for Science and Technological Development ofVojvodina.322
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Effects of dietary n-3 polyunsaturated fatty acids and ... - FINS

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