Desempenho de bezerros leiteiros em aleitamento artificial convencional ou fracionado

Performance of dairy calves in artificial fed milk conventional or fractionated

Resumos

Objetivou-se avaliar o consumo, o desempenho e a incidência de diarreia de bezerros da raça Holandesa, além de realizar análise técnica e econômica dos sistemas artificiais de aleitamento convencional e fracionado. Foram utilizados 22 animais, sendo 12 machos e 10 fêmeas, com peso corporal inicial médio de 37,26kg (±3,42), distribuídos em delineamento em blocos casualizados, de acordo com o sexo, alojados em baias individuais até os 59 dias de idade dos animais. O aleitamento convencional constituiu-se de quatro litros de leite diários durante 59 dias e o fracionado, de seis litros do 6º ao 25º; quatro litros do 26º ao 45º e dois litros do 46º ao 59º dia de idade, além de concentrado, de feno de Cynodon sp., de água e de suplemento mineral fornecidos ad libitum. O consumo dos alimentos e incidência de diarreia foram monitorados diariamente e os animais, pesados e medidos, semanalmente. Os dados de consumo, de ganho de peso diário, medidas de crescimento, conversão alimentar e a incidência de diarreia foram analisados em parcelas subdivididas. O ganho total corporal e o peso corporal final foram analisados em delineamento em blocos casualizados. O peso corporal inicial foi utilizado como covariável. O sistema de aleitamento não interferiu (p>0,05) nos consumos de concentrado, feno, água e o desempenho dos animais. O aleitamento fracionado proporcionou maior (p<0,05) consumo total de matéria seca no terceiro período de avaliação e menor custo por kg de ganho de peso total, indicando-o como melhor estratégia na bovinocultura leiteira.

análise econômica; bovino; diarreia; ganho de peso; leite

This study aimed to evaluate the intake, performance and incidence of diarrhea in Holstein dairy calves, besides perform the technical and economic analysis of the artificial fed milk conventional and fractionated. Were used 22 animals, 12 males and 10 females, with an average initial of body weight of 37.26kg (±3.42), allotted in a randomized block design housed in individual pens until 59 days old of animals. The feed milk conventional consisted of four liters of milk daily for 59 days and fractionated, six liters of 6º to 25º, four liters of 26º to 45º and two liters of 46º to 59º days old, besides of starter, hay Cynodon sp., water and mineral supplement provided ad libitum. The food consumption and incidence of days with diarrhea were monitored daily and the animals were weighed and measured weekly. The consumption data, daily weight gain, measures of growth, feed conversion and the incidence of days with diarrhea were analyzed in split plot. The total gain and final body weight were analyzed in a randomized block design. The initial body weight was used as a covariate. The nursing system did not affect (p>0.05) hay and water intakes, and animal performance. The fractionated breastfeeding provided greater (p<0.05) dry matter total intake of in the third period of evaluation and lowest cost per kilogram of total weight gain, indicating it is a best strategy as in dairy cattle.

cattle; diarrhea; economic analysis; milk; weight gain

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Datas de Publicação

• Publicação nesta coleção
  08 Maio 2014
• Data do Fascículo
  Mar 2014

Histórico

• Aceito
  28 Mar 2014
• Recebido
  15 Jul 2013