Consumo, digestibilidade aparente e glicemia de borregas nulíparas gestantes e submetidas a dois manejos nutricionais / Intake, and apparent digestibility lambs nulliparous pregnant blood glucose and under two nutritional managements

O presente trabalho teve como objetivo avaliar o consumo e a digestibilidade aparente dos nutrientes e a glicemia basal de borregas nulíparas em dois momentos da gestação e submetidas a dois manejos nutricionais: restrito e não restrito. O experimento foi realizado na Escola de Veterinária da Universidade Federal de Minas Gerais, no laboratório de Calorimetria e Metabolismo Animal. No período de junho a julho de 2006. Foram utilizadas 20 borregas nulíparas divididas em dois manejos nutricionais (restrito e não restrito). Os animais foram mantidos em gaiolas de metabolismo providas de cocho, bebedouro (balde plástico) e saleiro. As dietas eram compostas de feno de Tifton 85 picado, concentrado experimental (farelo de milho, farelo de soja e calcáreo) e quando preciso era adicionado o farelo de soja a mais para fechar as rações. As necessidades nutricionais foram baseadas no NRC (1985) e foi respeitada a divisão da gestação conforme a recomendação desse comitê. Para os animais mantidos em restrição nutricional foram retirados 15% das necessidades em energia na forma de nutrientes digestíveis totais (NDT) e proteína bruta. Os dois períodos experimentais (100 dias e 130 dias de gestação) tiveram duração de 20 dias cada, sendo 15 dias.[...]

The goal of this paper was to evaluate theintake and digestibility of nutrients andbasal glucose of nulliparous ewe lambs intwo stages of gestation and submited totwo nutritional management: restricted andunrestricted. The experiment wasconducted at the Veterinary School of theFederal University of Minas Gerais, in thelaboratory of Animal Metabolism andCalorimetry in the months of June and Julyof 2006. Twenty nulliparous ewe lambswere used and they were divided into twonutritional management (restricted andunrestricted). The animals were kept inmetabolism cages fitted with trough, watercooler (plastic bucket) and salt shaker.The diets were composed of Tifton 85 haychopped, experimental concentrate (cornbran, soybean meal and limestone) andwhen needed was added more soybeanmeal to close the rations. The nutritionalrequirements were based on NationalResearch Council (1985) and was respected division of gestation accordingto the recommendation of this committee.For animals kept in nutritional restrictionwere removed 15% of energyrequirements in the form of total digestiblenutrients (TDN) and crude protein. Thetwo experimental periods (100 days and130 days of gestation) had a duration of20 days each, with 15 days for adaptationand five collections. The animals weredistributed in a completely randomizeddesign in a factorial arrangement (twonutritional management and two periods ofgestation) and assessments were made inthe same animal. In the case of glucosewere evaluated at 100, 110, 120, 130 and140 days of gestation for 24 hours at thefollowing times: 0, 3, 6, 9, 12, 15, 18, 21and 24. The first collection (time 0) wasperformed before the first feeding. Amongthe times 6 and 9 animals received asecond feed of the day. The dry matterintake (DMI) in grams/day increasedsignificantly between periods of gestation. [...]

Consumo, digestibilidade aparente e glicemia de borregas nulíparas gestantes e submetidas a dois manejos nutricionais / Intake, and apparent digestibility lambs nulliparous pregnant blood glucose and under two nutritional managements

O presente trabalho teve como objetivo avaliar o consumo e a digestibilidade aparente dos nutrientes e a glicemia basal de borregas nulíparas em dois momentos da gestação e submetidas a dois manejos nutricionais: restrito e não restrito. O experimento foi realizado na Escola de Veterinária da Universidade Federal de Minas Gerais, no laboratório de Calorimetria e Metabolismo Animal. No período de junho a julho de 2006. Foram utilizadas 20 borregas nulíparas divididas em dois manejos nutricionais (restrito e não restrito). Os animais foram mantidos em gaiolas de metabolismo providas de cocho, bebedouro (balde plástico) e saleiro. As dietas eram compostas de feno de Tifton 85 picado, concentrado experimental (farelo de milho, farelo de soja e calcáreo) e quando preciso era adicionado o farelo de soja a mais para fechar as rações. As necessidades nutricionais foram baseadas no NRC (1985) e foi respeitada a divisão da gestação conforme a recomendação desse comitê. Para os animais mantidos em restrição nutricional foram retirados 15% das necessidades em energia na forma de nutrientes digestíveis totais (NDT) e proteína bruta. Os dois períodos experimentais (100 dias e 130 dias de gestação) tiveram duração de 20 dias cada, sendo 15 dias.[...](AU)

The goal of this paper was to evaluate theintake and digestibility of nutrients andbasal glucose of nulliparous ewe lambs intwo stages of gestation and submited totwo nutritional management: restricted andunrestricted. The experiment wasconducted at the Veterinary School of theFederal University of Minas Gerais, in thelaboratory of Animal Metabolism andCalorimetry in the months of June and Julyof 2006. Twenty nulliparous ewe lambswere used and they were divided into twonutritional management (restricted andunrestricted). The animals were kept inmetabolism cages fitted with trough, watercooler (plastic bucket) and salt shaker.The diets were composed of Tifton 85 haychopped, experimental concentrate (cornbran, soybean meal and limestone) andwhen needed was added more soybeanmeal to close the rations. The nutritionalrequirements were based on NationalResearch Council (1985) and was respected division of gestation accordingto the recommendation of this committee.For animals kept in nutritional restrictionwere removed 15% of energyrequirements in the form of total digestiblenutrients (TDN) and crude protein. Thetwo experimental periods (100 days and130 days of gestation) had a duration of20 days each, with 15 days for adaptationand five collections. The animals weredistributed in a completely randomizeddesign in a factorial arrangement (twonutritional management and two periods ofgestation) and assessments were made inthe same animal. In the case of glucosewere evaluated at 100, 110, 120, 130 and140 days of gestation for 24 hours at thefollowing times: 0, 3, 6, 9, 12, 15, 18, 21and 24. The first collection (time 0) wasperformed before the first feeding. Amongthe times 6 and 9 animals received asecond feed of the day. The dry matterintake (DMI) in grams/day increasedsignificantly between periods of gestation. [...](AU)