Effect of exogenous enzymes on the performance of broilers fed with distillers dried grain solubles (DDGS) based diet

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dc.contributor.advisorSihag, Zile Singh
dc.contributor.authorSonu
dc.date.accessioned2017-12-13T10:01:50Z
dc.date.available2017-12-13T10:01:50Z
dc.date.issued2017
dc.description.abstractA study of six weeks duration was conducted to evaluate the efficacy and utilization of using distillers dried grain solubles (DDGS) as a replacer of soybean meal with or without exogenous enzyme supplementation on the performance and carcass traits in broiler chickens. The study investigate the measurement of physical parameters of DDGS based diets and to access various observations viz. periodic feed intake, body growth, feed efficiency, energy and nitrogen retention, carcass characteristics and cost of rearing broilers under different dietary treatments. The evaluation of effect of replacement of soybean meal with DDGS on the physical parameters of the broiler ration was also done. The experimental work was conducted on 520 day old commercial broiler chickens randomly divided into thirteen dietary treatments having two replicates (twenty birds in each replicate) in each treatment. Maize soybean meal based diet was offered to control group (T1), while treatment groups T2, T3, T4 were supplemented with 15, 30 and 45% DDGS without exogenous enzymes; T5, T6, T7 were supplemented with 15, 30 and 45% DDGS having enzyme phytase; T8 , T9, T10 were supplemented with 15, 30 and 45% DDGS having enzyme protease; T11, T12, T13 were supplemented with 15, 30 and 45% DDGS having multienzyme. Particle size declined (P<0.05) as the DDGS level was increased in starter as well as finisher ration and reverse was true for the surface area and the number of particles per gram. Bulk density was higher (P<0.05) at 45% soybean meal replacement. The average body weight, body weight gain, feed intake and feed conversion ratio was recorded fortnightly during entire experimental period. A metabolism trial was conducted during 6th week of experiment. Two birds from each treatment were sacrificed after six week of age to study carcass traits. Comparative economics of different dietary treatment groups were also worked out. The body weight gain (g) during overall period of growth was significantly (P<0.05) higher in control group T9 followed by group T6 having 30% soybean meal replaced with DDGS with enzyme protease and phytase respectively. Feed intake was not affected up to 30% soybean meal replacement with or without enzyme supplementation. At 45% soybean meal replacement with DDGS, feed intake was significantly higher with or without enzyme supplementation. FCR were also not affected up to 15% soybean meal replacement with or without enzyme addition and no negative effect was observed even at 45% soybean meal replacement. Treatment groups with 45% DDGS level with or without enzyme had significantly lower (P<0.05) dressing and eviscerated yield as compared to other groups. Moisture and fat of the breast and thigh muscle were not affected by DDGS inclusion. Crude protein of breast and thigh muscle also did not alter significantly (P<0.05) but higher values were reported at all DDGS levels with protease enzyme. Profit per bird was maximum in group T9 having 30% soybean meal replaced by DDGS with enzyme protease.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810037493
dc.keywordsBroiler performance, Exogenous enzymes, Economics of broiler production, DDGS, Physical properties of dietsen_US
dc.language.isoenen_US
dc.publisherLUVASen_US
dc.subAnimal Nutritionen_US
dc.themeEffect of exogenous enzymes on the performance of broilers fed with distillers dried grain solubles (DDGS) based dieten_US
dc.these.typeM.V.Sc.en_US
dc.titleEffect of exogenous enzymes on the performance of broilers fed with distillers dried grain solubles (DDGS) based dieten_US
dc.typeThesisen_US
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