The state of Mato Grosso do Sul has a genetic origin of animals native Sulmatogrossense that has been highly adapted and highly productive and reproductive potential, these animals exhibit a combination of alleles that are close to the south and tossed races wooless Northeast , thus paving the way for the possibility of creating a new race. The sheep of this group do not exhibit reproductive seasonality may produce up to 1.5 lambs per year. They also have high yield potential and can earn up 350g/day, thereby providing early animals slaughtered within 6 months of age weighing 40 kg and may have a carcass yield of 50%. Herd animals with wool, the wool can be considered a byproduct of great importance. So keep the characteristics of these animals is of paramount importance, both to collaborate with the regional sheep production, as if to offer an additional option to breed to be created and used in sheep production systems.
The main objective of this research was to conduct an exploratory study of the lactation curve in order to characterize the productive potential of Pantaneiro ewes and lambs. Fifty ewes were bred using four rams in two different mating seasons. The ewes were kept with their lambs on pasture of Brachiaria brizantha. Ewe body score, ewe weight, and lamb weight were evaluated. Milk sampling was performed every week. In the morning for milk collections, the ewes were treated with 1 UI of oxytocin (intramuscular) for complete milking. Lambs were separated from the ewes for 4 h and milk collections were performed. The total milk production over 24 h was estimated by multiplying the production of this period (4 h) by 6. The data were analyzed using the MIXED procedure (P < 0.05) in SAS. Milk production data were fitted to the curve using the incomplete gamma function of Wood, and lamb growth data were fitted using the Gompertiz equation. The average milk production of the ewes was 1.03 kg/day. Younger ewes had the lowest milk production (18 = 798 ± 330, 24 = 1001 ± 440, 36 = 1100 ± 490, and 48 = 1106 ± 490 g/day). Ewe body score at lambing affected initial milk production (1.0 = 816 ± 660, 1.5 = 1089 ± 105, and 2.0 = 1424 ± 1600 g/day). Lambs were weaned with an average weight of 20.3 kg. Daily weight gain from birth to weaning was 181 g. Locally adapted Pantaneiro ewes showed a linear decreasing lactation curve, with reduced production from the second week of lactation. Overall, evaluation of the dairy production and lamb performance revealed great variation, denoting potential for selection.
RESUMO Objetivou-se avaliar o efeito da inclusão de níveis de glicerina bruta na alimentação de cordeiros nas características biométricas e histológicas testiculares. Foram utilizados 24 cordeiros não castrados, confinados com 93,79 ± 5,73 dias de idade e peso corporal de 20,22±2,84kg. Os tratamentos testados foram: 0; 2,5; 5,0 e 7,5% de inclusão de glicerina bruta na matéria seca da dieta em substituição ao milho. Os animais foram abatidos usando a condição corporal como critério em escore de 2,5 a 3,5, em uma escala que varia de 1 a 5, sendo que as variáveis avaliadas foram o peso inicial, peso final, peso de carcaça quente, espessura de gordura de cobertura, condição corporal, e os parâmetros biométricos testiculares: perímetro escrotal, peso testicular no escroto, peso dos testículos direito e esquerdo, volume dos testículos direito e esquerdo, largura testicular, comprimento testicular, diâmetro de túbulo seminífero e altura de epitélio germinativo. Não houve influência significativa dos níveis de glicerina bruta sobre nenhuma das variáveis analisadas, também não houve correlação entre as características avaliadas com a condição corporal. Foram observadas correlações positivas entre o peso de carcaça quente e espessura de gordura de cobertura (r=0,57, p<0,05). Houve correlação positiva (r=0,55, p<0,05)) entre perímetro escrotal e peso corporal. O diâmetro do túbulo (r=0,47, p<0,05) e a altura do epitélio seminíferos (r=0,62, p<0,05) estiveram correlacionados com o volume testicular. A inclusão de níveis crescentes de glicerina bruta na alimentação de cordeiros Pantaneiros até 7,5% de inclusão não influencia nas características biométricas e histométricas testiculares dos animais.
RESUMOObjetivou-se com este trabalho verificar a influência de níveis crescentes de proteína dieté-tica sobre o desempenho, digestibilidade aparente e concentrações de uréia plasmática e urinária, em bovinos da raça Pantaneira. Os dados foram obtidos de 15 novilhas, com 18 meses de idade e peso corporal inicial de 146 kg, recebendo dietas com 11; 13; 15 e 17 % de proteína bruta (PB). Os animais permaneceram confinados por 114 dias e em intervalos de 28 dias foram pesados e realizadas coletas de sangue, de fezes na ampola retal e de urina na forma spot. O aumento do teor de PB não influenciou o consumo de matéria seca (MS) e o ganho de peso médio diário (GMD); porém melhorou a digestibilidade dos nutrientes, elevou os níveis de nitrogênio no sangue e promoveu maior excreção de uréia urinária. Observou-se, em média, consumos de 5,13 kg MS/animal/dia; GMD de 570 g; coeficientes de digestibilidade aparente de 40,9; 59,6; 39,2; 41,3 e 34,0 % para MS, PB, carboidrato total (CT), fibra detergente neutro (FDN) e ácido (FDA), respectivamente; concentração de uréia plasmática de 49,6 mg/dL; e perda de uréia urinária de 110,0 g/animal/dia. SUMMARYThe objective of this experiment was to verify the influence of increasing levels of dietary protein on performance, apparent digestibility and plasma and urinary urea in Pantaneira breed. The data were obtained from 15 heifers, 18 months old and 146 kg initial body weight, fed diets containing 11, 13, 15 and 17 % of crude protein (CP). The animals were confined for 114 days. At intervals of 28 days they were weighed and blood samples and spot samples of feces from the rectum and of urine were taken. The increase in dietary CP content did not influenced dry matter (DM) intake and average daily weight gain (ADG), but improved nutrient digestibility, increased blood nitrogen levels and increased excretion of urinary urea. A mean intake of 5.13 kg DM/animal/day and an ADG of 570 g were observed. Apparent digestibility values of 40.9, 59.6, 39.2, 41.3 and 34,0 % for DM, CP, total carbohydrate, neutral detergent fiber and acid detergent fiber, respectively, were found. Plasma urea concentration was 49.6 mg/dL; and an urinary urea loss of 110,0 g/animal/day was observed. INTRODUÇÃOConhecidos como Tucura, os bovinos da raça Pantaneira são um recurso genético # Parte da dissertação de Mestrado do primeiro autor.
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