ABSTRACT
The objective of this study was to evaluate performance traits, intake, nutrient apparent digestibility, and economic analysis of lambs fed diets containing different levels of sunflower cake (SFC) with a certain chemical composition. Thirty-six Santa Inês × Dorper lambs (n = 9 per treatment diet) with an average body weight (BW) of 19.5±2.19 kg at the beginning of the study were randomly allocated to four isocaloric and isonitrogenous diets for 63 days. A control diet without SFC was compared with diets containing 5, 10, and 15% of dietary dry matter (DM) of SFC replacing soybean meal and corn. Growth performance and economic indicators were calculated. Moreover, individual faeces were collected using canvas bags to evaluate the apparent digestibility of nutrients between days 30 and 45 of study. The total BW gain linearly decreased with the inclusion of SFC in the lamb diet. However, no differences among treatments were observed for final BW, average daily gain, average daily feed intake, or feed conversion ratio. The inclusion of different levels of SFC in the diet reduced the intakes of DM as g/kg BW and non-fibre carbohydrates on DM basis. The apparent digestibility of all nutrients studied improved with the inclusion of 5% SFC but decreased with diets containing 10 or 15% of SFC. Moreover, the higher benefit:cost ratio was obtained for diet containing 5% SFC. Therefore, SFC from biodiesel production could be used at levels of 5% in lamb rations, reducing feeding costs without worsening productive performance, nutrient intake, and digestibility at the ages studied.(AU)
Subject(s)
Animals , Sheep/physiology , Biofuels/analysis , Helianthus/adverse effectsABSTRACT
The aim of this study was to evaluate the effect of concentrate supplementation on weight gain, the quantitative characteristics of carcass and non-carcass components of the castrated goat carcass Canindé breed grazing system in the native pasture caatinga. 40 goats with an average body (BW) initial weight of 15.76 ± 0.96kg were distributed in a completely randomized design in levels of 0; 0.5; 1 and 1.5% of supplementation (% BW) and were slaughtered when the animals from the 1.5% of supplementation level reached 23.10±1.74kg. Performance, carcass yield, yield of cuts and weight of non-carcass components (skin, head, blood, liver, kidneys, respiratory tract, gastrointestinal tract) as well as total fat weightwere positively influenced by supplementation levels. The supplementation levels of 1 and 1.5% of body weight are favorable to performance and quantitative characteristics of Canindé goat kids grazing in the native pasture caatinga.(AU)
Objetivou-se avaliar o efeito da suplementação concentrada sobre o ganho de peso, as características quantitativas da carcaça e dos não constituintes da carcaça de caprinos castrados da raça Canindé em sistema de pastejo na caatinga. 40 caprinos com peso corporal (PC) inicial médio de 15,76 ± 0,96kg foram distribuídos nos níveis de zero; 0,5; 1 e 1,5% de suplementação concentrada (% PC), sendo abatidos quando os animais que recebiam 1,5% de suplementação atingiram peso médio de 23,10 ± 1,74kg. Utilizou-se delineamento inteiramente casualizado com quatro níveis de suplementação e dez repetições. O ganho de peso, rendimento de carcaça, rendimento dos cortes e peso dos constituintes não carcaça (pele, cabeça, sangue, fígado, rins, trato respiratório, trato gastrointestinal), bem como o peso da gordura total, foram influenciados positivamente pelos níveis de suplementação. Os níveis de suplementação um e 1,5% do PC são favoráveis ao desempenho, às características de carcaça e ao desenvolvimento de órgãos em caprinos da raça Canindé em pastejo na caatinga.(AU)
Subject(s)
Animals , Ruminants , Dietary Supplements/analysis , Weight Gain , Arid Zone , PastureABSTRACT
The aim of this study was to evaluate the effect of concentrate supplementation on weight gain, the quantitative characteristics of carcass and non-carcass components of the castrated goat carcass Canindé breed grazing system in the native pasture caatinga. 40 goats with an average body (BW) initial weight of 15.76 ± 0.96kg were distributed in a completely randomized design in levels of 0; 0.5; 1 and 1.5% of supplementation (% BW) and were slaughtered when the animals from the 1.5% of supplementation level reached 23.10±1.74kg. Performance, carcass yield, yield of cuts and weight of non-carcass components (skin, head, blood, liver, kidneys, respiratory tract, gastrointestinal tract) as well as total fat weightwere positively influenced by supplementation levels. The supplementation levels of 1 and 1.5% of body weight are favorable to performance and quantitative characteristics of Canindé goat kids grazing in the native pasture caatinga.
Objetivou-se avaliar o efeito da suplementação concentrada sobre o ganho de peso, as características quantitativas da carcaça e dos não constituintes da carcaça de caprinos castrados da raça Canindé em sistema de pastejo na caatinga. 40 caprinos com peso corporal (PC) inicial médio de 15,76 ± 0,96kg foram distribuídos nos níveis de zero; 0,5; 1 e 1,5% de suplementação concentrada (% PC), sendo abatidos quando os animais que recebiam 1,5% de suplementação atingiram peso médio de 23,10 ± 1,74kg. Utilizou-se delineamento inteiramente casualizado com quatro níveis de suplementação e dez repetições. O ganho de peso, rendimento de carcaça, rendimento dos cortes e peso dos constituintes não carcaça (pele, cabeça, sangue, fígado, rins, trato respiratório, trato gastrointestinal), bem como o peso da gordura total, foram influenciados positivamente pelos níveis de suplementação. Os níveis de suplementação um e 1,5% do PC são favoráveis ao desempenho, às características de carcaça e ao desenvolvimento de órgãos em caprinos da raça Canindé em pastejo na caatinga.