Carcass and noncarcass components of Santa Inês lambs fed mango meal replacing corn

Este estudo avaliou as características dos constituintes e não constituintes da carcaça de cordeiros Santa Inês alimentados com dietas contendo diferentes proporções de farelo de manga (FM) em substituição ao milho. Foram utilizados 24 cordeiros, castrados, com peso corporal inicial médio de 23,3 kg, alojados em baias individuais e alimentados, por 77 dias, com rações isoproteicas, contendo quatro níveis de substituição (0; 33; 66 e 100%) do milho pelo FM. A relação volumoso:concentrado foi de 40:60, com capim elefante (Pennisetum purpureum Schum.) in natura utilizado como volumoso. O delineamento experimental foi inteiramente casualizado, com quatro tratamentos e seis repetições. Considerando os constituintes da carcaça, não foi observada influência (P>0,05) do nível de inclusão do FM, exceto para os cortes serrote e paleta e para o rendimento de paleta. Quanto aos não constituintes da carcaça, observou-se influência (P 0.05), except for brisket and hindquarter weights and hindquarter yield. Quantitative characteristics of eye-muscle area (fat thickness and tissue composition) of Santa Inês lambs were also unchanged. Thus, the MF can be used as food for Santa Inês lambs without damage to quantitative and qualitative carcass and noncarcass characteristics

Intake and total apparent digestibility in lambs fed six maize varieties in the Brazilian Semiarid

The objective of this study was to evaluate the daily intake and total apparent digestibility of dry matter, organic matter, crude protein, gross energy, ether extract, neutral detergent fiber, acid detergent fiber, total and non-fibrous carbohydrates, total digestible nutrients, energy intake and nitrogen balance of silages of six maize varieties with early or super early cycles recommended to Northeast Brazil. Twenty-four male castrated lambs were lodged in metabolic cages. A completely randomized design with six treatments and four replications was used, with means compared by Tukey test at 5%. There were no differences among varieties for any of the evaluated variables regarding intake and apparent digestibility. Concerning the intake of digestible energy, metabolizable energy and the ratio content of digestible and metabolizable energy, significant differences were observed between varieties and BRS Assum Preto showed highest values of metabolizable energy (2.650,8 kcal/day). All of the treatments presented positive nitrogen balance and did not differ among themselves. The varieties asessed can be an additional option to the semiarid regions in Brazil