Suplementação alimentar de matrizes em pasto diferido:desempenho de ovelhas e cordeiros até o desmame

• Ano de defesa: 2017
• Autor(a) principal: Campos, Nathália Rafaela Fidelis
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Brasil; UFRN; PROGRAMA DE PÓS-GRADUAÇÃO EM PRODUÇÃO ANIMAL
• Palavras-chave em Português: Concentrado; Ganho de peso; Medidas biométricas; Mistura múltipla; Ovinos; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::PRODUCAO ANIMAL
• Link de acesso: https://repositorio.ufrn.br/jspui/handle/123456789/23920

The objective of this study was to evaluate the influence of food supplementation on performance of ewes and lambs kept in deferred pasture during the final third of gestation until weaning. The experiment conducted in the experimental area of the Study Group in Forage (GEFOR) located in the Campus Macaíba the Federal University of Rio Grande do Norte (UFRN), from December 30, 2015 to June 19, 2016. Used 55 matrices, with no defined racial pattern, with an average of 120 days of gestation at the beginning of experiment. 61 lambs were generated from of birth single and twin. The matrices randomly distributed in three treatments: multiple mixture supplementation and concentrated supplementation at 0.4% and 0.8% of the live weight. The matrices remained in deferred pasture of Brachiaria brizantha cv. Marandu in the daytime, collected at collective bays where the supply of supplements occurred. The performance of the matrices evaluated from the live weight, average daily gain and total weight gain. The performance of the offspring evaluated from the birth weight, with weekly weighing up to the age of 90 days (weaning age). Thus, it was possible to follow the average daily weight gain (GMD) and the total weight gain (GT). The biometric measurements started at 30 days of age and biweekly until reaching 90 days of age. There was an effect (P <0.05) of feed supplementation and type of calving in live weight at calving. Sheep supplemented with 0.8% live weight concentrate had the lowest weight losses than those supplemented with 0.4% concentrate and multiple blend. There was an effect (P <0.05) of the food supplementation of the mother, the sex of the lamb, the calving type and the breed of the breeder on the live weight of the lamb at birth at 30, 60 and 90 days of age. The variables presented had an effect (P <0.05) on GMD and GT from lambs from birth to weaning. The biometric measurements of the lambs had a significant effect (P <0.05) of the dietary supplementation of the matrix and the type of delivery, single or twin. The use of concentrated supplementation at a level of 0.4% of live weight allows better productive and reproductive indexes for ewes kept in deferred pasture. Lambs whose mothers receive concentrated supplementation at a level of 0.4% of live weight present better development and growth, as well as greater viability for the production system.