EFFECT OF DIETARY SUPPLEMENTATION OF RUMEN PROTECTED OMEGA-3 FATTY ACIDS ON PERFORMANCE OF LACTATING COWS

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dc.contributor.advisorMurugan, S. Senthil
dc.contributor.authorSUBRAHMANYESWAR, GOKARAKONDA
dc.date.accessioned2020-12-31T07:09:33Z
dc.date.available2020-12-31T07:09:33Z
dc.date.issued2019-07-04
dc.descriptionThe present research work was carried out to study the effect of supplementation of rumen protected omega-3 fatty acids rich rapeseed oil on the performance of lactating cows. Eighteen lactating crossbred cows were selected and divided randomly into three groups with six animals in each group. These were fed with basal diet (concentrates and green roughage ad libitum) for cows in control (G I) and cows in group G II fed with basal diet plus calcium salts of rape seed oil fatty acids (CaRSO) and cows in G III fed with basal diet plus encapsulated rape seed oil at level of 20g/kg of milk/day for 90 days including five days digestion trial. In vitro degradability studies were conducted on experimental rations in RUSITEC. The daily feed intake and milk yield were recorded. The composition of milk was analysed weekly and fatty acid profile of milk was analysed monthly by gas chromatography. Every month body condition score was recorded. The mean daily DMI (kg/day/cow) was 10.10±0.060, 10.57±0.062 and 11.50±0.060 for cows in groups GI, GII and GIII respectively that differed significantly (P<0.01). The mean daily milk yield was 10.34±0.04, 10.65±0.09 and 10.65±0.14 for animals of GI, GII and GIII respectively which was differed (P<0.01) between control (G I) and treatment groups G II and G III. The mean milk fat and TS (per cent) differed significantly (P<0.01) between animals of groups G I and G II. The SNF and milk protein (per cent) values were not changed. The BCS and change in body weight were similar in animals of all groups. The omega-3 fatty acids (alpha linolenic acid, eicosapentaenoic acid and docosahexaenoic acid) levels were detected in milk of cows fed with rumen protected fat of rapeseed oil when compared to those in control group. It was concluded that supplementation of PUFA rich rapeseed oil in rumen protected form had increased the DMI, milk yield, without any significant change in the body weight when compared to that of control. The supplementation of CaRSO and encapsulated rapeseed oil increased the concentration of omega-3 fatty acids in milk of treatment group cows. The dietary supplementation of encapsulated rapeseed oil in protected form was comparatively better than CaRSO with respect to DMI, milk yield, milk fat and detectable concentration of omega-3 fatty acids in milk.en_US
dc.description.abstractThe present research work was carried out to study the effect of supplementation of rumen protected omega-3 fatty acids rich rapeseed oil on the performance of lactating cows. Eighteen lactating crossbred cows were selected and divided randomly into three groups with six animals in each group. These were fed with basal diet (concentrates and green roughage ad libitum) for cows in control (G I) and cows in group G II fed with basal diet plus calcium salts of rape seed oil fatty acids (CaRSO) and cows in G III fed with basal diet plus encapsulated rape seed oil at level of 20g/kg of milk/day for 90 days including five days digestion trial. In vitro degradability studies were conducted on experimental rations in RUSITEC. The daily feed intake and milk yield were recorded. The composition of milk was analysed weekly and fatty acid profile of milk was analysed monthly by gas chromatography. Every month body condition score was recorded. The mean daily DMI (kg/day/cow) was 10.10±0.060, 10.57±0.062 and 11.50±0.060 for cows in groups GI, GII and GIII respectively that differed significantly (P<0.01). The mean daily milk yield was 10.34±0.04, 10.65±0.09 and 10.65±0.14 for animals of GI, GII and GIII respectively which was differed (P<0.01) between control (G I) and treatment groups G II and G III. The mean milk fat and TS (per cent) differed significantly (P<0.01) between animals of groups G I and G II. The SNF and milk protein (per cent) values were not changed. The BCS and change in body weight were similar in animals of all groups. The omega-3 fatty acids (alpha linolenic acid, eicosapentaenoic acid and docosahexaenoic acid) levels were detected in milk of cows fed with rumen protected fat of rapeseed oil when compared to those in control group. It was concluded that supplementation of PUFA rich rapeseed oil in rumen protected form had increased the DMI, milk yield, without any significant change in the body weight when compared to that of control. The supplementation of CaRSO and encapsulated rapeseed oil increased the concentration of omega-3 fatty acids in milk of treatment group cows. The dietary supplementation of encapsulated rapeseed oil in protected form was comparatively better than CaRSO with respect to DMI, milk yield, milk fat and detectable concentration of omega-3 fatty acids in milk.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810157928
dc.keywordsFATTY ACID PROFILE , RAPESEED OIL , RUMEN PROTECTED FAT , EXPERIMENTAL RATIONS , OMEGA 3 FATTY ACIDS , LACTATING COWS , MILKen_US
dc.language.isoEnglishen_US
dc.pages101en_US
dc.publisherCOLLEGE OF VETERINARY AND ANIMAL SCIENCES, POOKODE WAYANADen_US
dc.research.problemDIETARY SUPPLEMENTATION OF RUMEN PROTECTED OMEGA-3 FATTY ACIDS ON PERFORMANCE OF LACTATING COWSen_US
dc.subAnimal Nutritionen_US
dc.themeEFFECT OF DIETARY SUPPLEMENTATION OF RUMEN PROTECTED OMEGA-3 FATTY ACIDS ON PERFORMANCE OF LACTATING COWSen_US
dc.these.typeM.V.Sc.en_US
dc.titleEFFECT OF DIETARY SUPPLEMENTATION OF RUMEN PROTECTED OMEGA-3 FATTY ACIDS ON PERFORMANCE OF LACTATING COWSen_US
dc.typeThesisen_US
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