Abstract:RESUMO -Trinta e dois cordeiros (16 machos e 16 fêmeas) deslanados mestiços de Santa Inês, criados com as matrizes em pastagem de Brachiaria humidicola e suplementados em creep-feeding no período noturno, foram distribuídos em delineamento inteiramente casualizado, em esquema fatorial 4x2 -quatro idades de desmame (56, 70, 84 e 98 dias) e sexo, com o objetivo de determinar a melhor idade para o desmame desses animais. Ao desmame, os cordeiros foram confinados, até completarem 126 dias de vida, em baias individ… Show more
“…FREITAS et al (2005) have shown, in Santa Inês hair breed which were weaned at 56 and 98 days, ADG of 143g and 150g in lambs slaughtered at 126 days of age, while MULLER et al (2006) reported ADW of 182 g and 183 in lambs weaned at 35 and 42 days and slaughtered with 28kg of liveweight.…”
“…FREITAS et al (2005) have shown, in Santa Inês hair breed which were weaned at 56 and 98 days, ADG of 143g and 150g in lambs slaughtered at 126 days of age, while MULLER et al (2006) reported ADW of 182 g and 183 in lambs weaned at 35 and 42 days and slaughtered with 28kg of liveweight.…”
“…As médias para peso ao nascer encontradas nesse estudo estão próximas aos 3,68 kg e 3,85 kg, registrados pro Freitas et al (2005) Tendo em vista o peso e ganho médios até os 60 dias, Freitas et al (2005) avaliando cordeiros em pastagem e com acesso ao alimento privativo das 17:00 às 7:00 (creep-feeding-noturno), encontraram (P60) de 13,53 kg, com GMD de 0,161. Esses resultados foram muito semelhantes aos encontrados por Siqueira et al (1993) os quais observaram ganhos para SOUZA, A.J.…”
SOUZA, A.J. et al. Avaliação do ganho em peso de cordeiros da raça Santa Inês no periparto criados na região do Planalto Central brasileiro. PUBVET, Londrina, V. 8, N. 7, Ed. 256, Art. 1698, Abril, 2014
“…The age and weight of lambs at weaning are very important factors for sheep raising activity. The literature classifies early weaning at 45 days; semi-early or normal around 60 days; and late at 120 days old (Oliveira et al 1996;Freitas et al 2005;Müller et al, 2006) In aiming to increase the efficiency of sheep husbandry by shortening the rearing cycle (reducing the finishing period for slaughter), researchers have investigated strategies to advance weaning age. Oliveira et al (1996) examined lambs weaned at 70 to 84 days of age; and Freitas et al (2005) recommended weaning lambs at 72 days of age, as they obtained good feed conversion in feedlots and increased daily weight gains.…”
This study aimed to examine the weaning age (60 and 90 days) of lambs supplemented while grazing on Urochloa brizantha cv. Marandu pasture. Production performance, incidence of worm infections, intoxication, and production cost of lambs, beside that body condition and occurrence of single or twin births in the ewes were evaluated, by two consecutive years. There was no effect of year. Lambs weaned at 90 days consumed more supplement (281.0 g/day) than those weaned at 60 days (210.2 g/day) and showed a higher total weight gain (20.76 kg vs. 14.97 kg). Weaning age did not influence the occurrence of worm infections and intoxication by Urochloa spp. in the lambs, dam weight or body condition score (BCS). Ewes with single-born showed a better BCS (1.8 points) than those ewes had twin-born (1.4 points). The costs of supplementing the lambs and the effective operating cost were higher when the lambs were weaned at 90 days of age. There was no difference for intake, lamb performance between the weaning age groups. We recommend to wean lambs at 90 days in a creep feeding system.
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