Vandenberg Lira Silva

Nutrient intake and quantitative aspects of carcass of finishing sheep fed with diets containing cashew nut meal

Objetivou-se determinar o consumo de nutrientes e os aspectos quantitativos da carcaca de ovinos de diferentes grupos geneticos com dietas com ou sem farelo de castanha de caju. Foram usados dezoito ovinos com peso inicial medio de 20,1kg em um delineamento inteiramente casualizado, em esquema fatorial 3 x 2 (tres cruzamentos e duas dietas diferentes). A inclusao do farelo de castanha de caju influenciou (P<0,05) o consumo de nutrientes. Diferencas de consumo entre as racas resultaram em maior consumo para os animais mesticos Dorper x sem padrao racial definido (SPRD), seguidos pelos mesticos Somalis x SPDR e pelos mesticos Santa Ines x SPRD. No entanto, nao houve diferencas entre os genotipos em relacao a dieta controle. O ganho de peso medio diario foi menor para as racas a cuja dieta foi adicionado farelo de castanha de caju. Os diferentes cruzamentos e as dietas nao afetaram a conversao alimentar. A inclusao de farelo de castanha de caju nas dietas reduziu o peso de carcaca fria, bem como o peso das costelas. A adicao de farelo de castanha de caju diminui o consumo de alimentos e o rendimento de carcaca. Entre os cruzamentos avaliados neste estudo, os ovinos mesticos Dorper x SPRD apresentam maior taxa de ganho de peso medio diario.

Ganho em peso, características de carcaça e carne de ovelhas terminadas em pasto com teores diferentes de suplementação

This work was carried out in order to evaluate weight gain and carcass and meat traits of culling ewes kept on grass Panicum maximum cultivar Massai, consuming different levels of concentrate. The design was entirely at random and females were distributed into four treatments, zero, 0.7, 1.4 and 2.1% of its body weight in concentrate supplementation consumed. The females were slaughtered at eighty days of the experiment. We measured the weight gain of animals and carcass and meat traits. The data were interpreted after analysis of variance and regression (P < 0.0500). The maximum weight gain was observed with intake of 1.49% concentrate as a function of body weight, point closed to which it was obtained the best feed conversion. However, the cost benefit was better with intake of 0.62% concentrate depending on the body weight. Carcasses did not show changes, and the gain in body weight was obtained in visceral fat. Meat showed lower ultimate pH and lower losses during cooking when the culling ewes consumed more concentrates. All treatments possessed tender meats, however, its color was found in the bottom limit of the normal range of specie.

Morfologia dos pré-estômagos e de papilas ruminais de cordeiras Santa Inês em crescimento submetidas a dois planos nutricionais

For the evaluation of nutritional schemes and change on the pre-stomach morphology and quantification of rumen papillae, 36 Santa Ines female lambs were submitted to two nutritional schemes (ad libitum or restrict) and slaughtered with different live weights (20, 30 or 40 kg) in a completely randomized factorial design 2x3. After slaughter, the viscera were weighed empty and their volume was measured. Samples of ruminal wall from the cranial and ventral sacs were collected and with a stereomicroscope photographed and analyzed regarding height, basal width, area, papillae per cm² and absorptive area per cm². The results were submitted to analyses of variance and the means were compared by Student Newman Keuls test. The different nutritional schemes did not influence the weight of rumen, reticulum or omasum (P>0.05), although, growth of the viscera was observed by increase in live weight. The viscera volume was affected by live weight, and smaller volume was observed in the animals fed ad libitum diet (P<0.10). The number of papillae per cm² was reduced by the increase in live weight. Height and area of papillae were larger in heavier animals. The nutritional scheme only affected height and area of papillae of the cranial sac. The absorptive area was not affected by the treatments. Different nutritional schemes and live weights affect the pre-stomach morphology of Santa Ines female lambs.

Performance and carcass characteristics of lambs fed a solution of crude glycerin during feedlot and pre-slaughter lairage

The objective of this study was to evaluate performance and carcass and meat characteristics of lambs fed a solution of cheese whey plus water (100 g kg−1 dry matter) (CW) during feedlot and pre-slaughter lairage. Data were analyzed as a 2 × 2 factorial (place – feedlot and slaughterhouse, food – water or CW). We evaluated the following treatments (feedlot/slaughterhouse): CW/CW, CW/water, water/CW, and control (water/water). The lambs were given a balanced diet for 70 days in the feedlot. Slaughter started 12 h after the animals arrived at the slaughterhouse. Dry matter intake, gain-to-feed ratio, average daily gain, and body weight of lambs fed CW were similar to those of control lambs. The water/CW group consumed less of this solution than the CW/CW group in the slaughterhouse. The CW supplied as a pre-slaughter supplement reduces the drip losses of lamb carcasses provided that the animals also consume it during the feedlot period. The other carcass characteristics (carcass weight, pH, subcutaneous fat thickness, and ribeye area) were similar among treatments. The meat characteristics (color, water holding capacity, cooking losses, and shear force) were similar among treatments. Whey cheese added to water can be used as an ingredient of the diet for lambs and as pre-slaughter supplement, since it does not change performance and improves carcass characteristics.

Meat cuts and non-carcass of sheep finished on pasture with different levels of supplementation.

This study aimed to evaluate the yield of meat cuts and other body components of sheep kept on pasture Panicum maximum , Massai cultivar, fed increasing amounts of concentrate. The animals were divided into four treatments according to the concentrate intake in relation to body weight (zero, 0.7, 1.4 and 2.1%). After slaughter of the sheep, the weights of non-hollow viscera (tongue, lung, liver, diaphragm, kidney and spleen), hollow ones (trachea, esophagus, heart, gallbladder, bladder, rumen, omasum, abomasum, small and larger intestines), other components (blood, skin, feet, head, tail and mammary 1

Consumo e digestibilidade dos nutrientes dietéticos em cordeiros de diferentes grupos genéticos alimentados com farelo de castanha de caju

This study aimed to evaluate the inclusion of cashew nut meal (CNM) offered to lambs of three genetic groups on intake and digestibility of dietary nutrients. Eighteen male lambs, ½ Dorper x ½ native, ½ Somalis x ½ native and ½ Santa Ines x ½ native, with body weight of 22,66. The control diet, constituted Aruana´s hay, corn, soybean meal. The test diet was constituted of these feed plus CNM, Acompletely randomized design in a factorial project 3 x 2, three genetic groups versus two diets (with or without CNM) with three replicates per treatment.Higher intakes were obtained for the animals ½ Dorper x ½ native compared to animals ½ Santa Ines x ½ native, being similar to the animals ½ Somalis x ½ native. There was significant interaction only for the DM digestibility. Lower digestibilities were observed for animals ½ Santa Ines x ½ native in the diet containing the CNM. Lower digestibilities of ADF and HCEL were observed in the diets with the inclusion of CNM. For the genetics groups, NDF, ADF and HCEL digestibilities higher it was verified to the animals ½ Dorper x ½ native comparedto theanimals ½ Santa Ines x ½ native, being both similar to the animals ½ Somalis x ½ native. The inclusion of CNM has a negative effect on the digestibilities of fibrous fractions, especially on the hemicellulose, resulting in reduction on the digestibility of dietary DM in the ½ Santa Ines x ½ native.

Concentração de Ácidos Graxos Voláteis no Líquido Ruminal de Ovinos Alimentados com Milho Expandido sob Estresse Térmico

Objetivou-se com esse trabalho avaliar o efeito do estresse calorico e do milho expandido nas concentracoes de acidos graxos volateis (AGV’s) no liquido ruminal em ovinos. Os tratamentos consistiram em 2 temperaturas do ambiente (conforto e estresse), 4 niveis de inclusao de milho expandido em substituicao ao farelo de milho (0, 33, 66 e 100%) e 6 tempos de coleta do liquido ruminal (0, 2, 4, 6, 8 e 12 h). A inclusao de milho expandido da dieta nao influenciou as concentracoes de AGV’s. Niveis de AGV’s tendem a se manter linear em animais sob estresse calorico. DOI: 10.15528/2176-4158/rcpa.v14n2p188-191