Roberta de Lima Valença

Physicochemical and sensory characteristics of meat from lambs fed diets containing mulberry hay

Abstract The aim of this study was to evaluate the physicochemical and sensory characteristics of the of meat lamb fed diets containing 0%, 12.5%, and 25.0% mulberry hay (total diet). Twenty-four Île-de-France lambs in the feedlot at an average age of 60 days and 15 kg body weight were allocated to individual stalls and slaughtered at 32 kg BW. Mulberry hay inclusion in the diet did not affect the meat pH 45 min (6.45) and 24 h (5.70) after slaughter. Average luminosity (L*), red intensity (a*), and yellow intensity (b*) values in the meat 24 h after slaughter were 40.85, 14.51, and 4.17, respectively. No differences were observed for water-holding capacity (58.03%), cooking loss (41.95%), shear force (2.80 kgf/cm2), sarcomere length (1.60 µm), or the sensory traits appearance (7.29), taste (7.23), tenderness (7.51), and overall acceptance (7.48). Inclusion of up to 25% mulberry hay in a concentrate-based diet did not compromise the physicochemical and sensory traits of the meat, indicating that this ingredient is as a good alternative to provide nutrients in the diet of feedlot lambs.

Silagem de bagaço de laranja pré-seco e a sua utilização na alimentação de ruminantes – Revisão

The orange peel, consisting of bark, seeds and pulp, is a by-product of adequate nutritional value for feeding to ruminants, as it has nutritional characteristics, such as energy and similar protein to corn, this byproduct is widely used in the Brazilian livestock, under the pelletized form, the pelletizing being an expensive process, generating interest in fruit processing companies to develop markets for moist orange peel. However being a high moisture food, it deteriates in a short time and silage is emerging as an alternative to the storage of this by-product without compromising the nutritional characteristics. The orange peel is rich in pectin, highly degradable carbohydrate in the rumen which has a tendency to keep the rumen pH higher compared to traditional energy foods, which are rich in starch. This review aims to address issues regarding the silage of orange peel and their use in ruminant feed.