desempenho reprodutivo de ovelhas submetidas a diferentes formas de suplementação alimentar antes e durante a estação de monta reproductive performance of ewes submitted to different feeding managements before and during the breeding period

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ID: 136908
2006
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Abstract
Objetivou-se com este estudo analisar o desempenho reprodutivo de ovelhas submetidas a diferentes formas de suplementação alimentar antes e durante o período de acasalamento. Utilizaram-se 112 ovelhas (63 no primeiro ano e 49 no segundo) dos grupos raciais Hampshire Down, Ile de France, Suffolk e Corriedale. Os animais foram separados em três grupos: T1 (sem suplementação), T2 (suplementação com 600 g/dia de milho triturado) e T3 (suplementação com 600 g/dia de concentrado constituído de 75% de milho triturado e 25% de farelo de soja). As ovelhas sob suplementação (T2 e T3) apresentaram maiores pesos e ganhos de peso até o final da estação de monta. Os escores da condição corporal também foram maiores ao final da estação de acasalamento nas ovelhas sob suplementação, implicando maior deposição de tecidos (músculo e gordura) no corpo do animal. O flushing não resultou em maior taxa de parição nem em aumento de partos gemelares, porém, ocasionou maior índice de natalidade nas ovelhas que receberam suplementação somente com milho. Os fatores idade e grupo racial das ovelhas afetaram significativamente o índice de natalidade. A suplementação energética com milho pode melhorar o número de cordeiros nascidos por ovelhas acasaladas.
The objective of this study was to investigate the reproductive performance of ewes submitted to different feeding management before and during the breeding period. A total of 112 ewes, 63 in year one and 49 in year two of the study, from the genetic groups Hampshire Down, Ile de France, Suffolk and Corriedale, were used. The ewes were separated in three groups: T1 (without supplementation), T2 (supplemented with 600 g/day of ground corn) and T3 (supplemented with 600 g/day of a concentrate containing 75% of ground corn and 25% of soybean meal). Supplemented ewes (T2 and T3) had higher body weight and more weight gain until the end of the breeding period than those not supplemented. Body condition scores were also greater at the end of the breeding period for supplemented ewes, indicating a greater fat and muscle deposition. Supplementation did not improve fertility rate and twins birth rate, but increased birth rate in ewes supplemented with corn. Age and genetic group both affected birth rate. It was concluded that feeding corn to ewes improved the number of lambs per ewe.
Reference Key
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Authors ;Rinaldo Masato Mori;Edson Luis de Azambuja Ribeiro;Ivone Yurika Mizubuti;Marco Antonio da Rocha;Leandro das Dores Ferreira da Silva
Journal european journal of lipid science and technology
Year 2006
DOI
10.1590/S1516-35982006000400025
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982006000400025
Keywords
reproduction body condition score flushing escore da condição corporal

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