Prenhez em rebanhos ovinos do Rio Grande do Sul-Brasil

Ribeiro, Luiz Alberto Oliveira; Gregory, Ricardo Macedo; Mattos, Rodrigo Costa

doi:10.1590/s0103-84782002000400015

Cited by 12 publications

(12 citation statements)

References 2 publications

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“…No significant differences were found in growth rates or days to slaughter between lambs born as single or twins, although there was a tendency for single-born lambs to grow faster. Studies show that differences between genetic groups, sexual condition, diet, among others, may influence lamb performance (Arnold & Meyer, 1988;Ribeiro et al, 2002).…”

Section: Resultsmentioning

confidence: 99%

Performance and carcass quality in three genetic groups of sheep in Brazil

Cardoso

Landim

Louvandini³

et al. 2013

R. Bras. Zootec.

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-Three different genetic groups were evaluated for growth up to slaughter and carcass quality for kill out, commercial cuts, non-carcass components, as well as carcass morphometric measurements. Pure Santa Ines (SI), ½ Ile de France × ½ Santa Ines (I × SI) and ½ Texel × ½ Santa Ines (T × SI) lambs were weighed weekly until they reached predetermined slaughter weight (30, 35, 40 and 45 kg). In both creep feeding and fattening the animals from crosses were superior to the Santa Ines hair sheep in terms of daily weight gain and weaned in less time. Crossbred animals also showed better performance than purebred Santa Ines in terms of commercial cuts and carcass weights. Correlations showed that fat depth and eye muscle area decreased with an increase in morphometric measures, indicating that larger animals are possibly later developing in terms of carcass finishing compared with smaller animals. The optimal slaughter weight is approximately 35 kg.

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Section: Resultsmentioning

confidence: 99%

Performance and carcass quality in three genetic groups of sheep in Brazil

Cardoso

Landim

Louvandini³

et al. 2013

R. Bras. Zootec.

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“…These farmers started investing in other more profitable sectors, giving room for the growth of specialized beef breeds [6] in this region. This reduction is also attributed to problems such as foot rot, sanitary problems and reproductive problems such as high lamb mortality and low fertility [18]. The shift towards the northeast also reflected a change in breed type, away from wool animals towards hair sheep which are generally less productive due to the lack of breeding programs [19], slower growth rates and produce with meat with different chemical and sensorial qualities than the wool breeds [20].…”

Section: Discussionmentioning

confidence: 99%

Dynamics of Sheep Production in Brazil

Hermuche

Maranhão

Guimarães

et al. 2013

IJGI

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Abstract:Sheep production is present on all continents and has been practiced in Brazil since the colonization. In this study, the multitemporal dynamics of sheep production in Brazil is examined using official government data (Brazilian Institute for Geography and Statistics-IBGE) from 1976 to 2010. Maps of flock growth rates and growth acceleration maps by municipality were elaborated. The Southern states are seen to show a reduction in production mainly due to the wool crisis in the 1970s and 80s. The Northeast is seen to be important for meat production. More recently, centerwest and northern states have shown an increase in growth rates but this is still incipient. The maps of growth, acceleration and midpoint for sheep production showed a noticeable return to an increase in production in the South in recent years. The midpoint of production flow was in the northeast direction, which has stagnated. There was great dynamics in sheep production over the whole Brazilian territory, which affected supply chains due to the expansion of domestic and

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“…As cordeiras foram examinadas sem jejum prévio, usando-se um brete a 40 cm do solo, com o exame realizado na região inguinal direita do animal. A taxa de prenhez (TP, em %) foi calculada conforme descrito por Ribeiro et al (2002).…”

Section: Methodsunclassified

Recria de cordeiras em pastagem nativa melhorada submetida à fertilização nitrogenada: 2. Produção animal

et al. 2008

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RESUMO -Avaliou-se o desempenho de cordeiras de corte para o acasalamento no outono em pastagem nativa melhorada fertilizada com adubo mineral fórmula 5-20-20 (250 kg/ha). Utilizaram-se duas doses de nitrogênio (100 e 200 kg/ha na forma de uréia), fracionadas em duas aplicações (70% em 3 de fevereiro e 30% em 17 de março de 2005) considerando controle piquetes sem aplicação de nitrogênio. Os tratamentos foram distribuídos em blocos completos com duas repetições. O método de pastejo foi contínuo com lotação variável e oferta de forragem de 16% (16 kg MS/100 kg peso vivo [PV]). O período de avaliação foi de 21 de janeiro a 31 de maio. As variáveis estudadas foram taxa de lotação, carga animal, desaparecimento de MS em %PV, ganho de peso médio diário, escore de condição corporal, ganho de peso por área e taxa de prenhez. O desaparecimento de MS em %PV não diferiu entre as doses de nitrogênio e os períodos de avaliação e apresentou valores limitantes em relação ao provável consumo potencial. As doses de nitrogênio tiveram efeito positivo sobre a taxa de lotação e a carga animal, que não diferiram no decorrer das avaliações. O escore de condição corporal, o ganho médio diário e o ganho de peso por área apresentaram variações significativas entre os períodos de avaliação, como resultado da influência do déficit hídrico registrado durante o período experimental. A taxa de prenhez não foi influenciada pelas doses de nitrogênio. Apesar do déficit hídrico, que comprometeu negativamente as variáveis produtivas da pastagem e a resposta animal às doses de nitrogênio aplicadas, a pastagem nativa melhorada por meio de adubação pode suportar elevadas taxas de lotação.Palavras-chave: ganho de peso médio diário, ganho de peso por área, oferta de forragem, pastejo contínuo, prenhezRearing of lambs in improved native pasture submitted to nitrogen fertilization. 2. Animal production ABSTRACT -The performance of lambs for the mating in the autumn in improved native pasture fertilized with 250 kg/ha of mineral formula 5-20-20 was evaluated. Two levels of nitrogen (N) (100 and 200 kg/ha of N as urea) divided in two applications, 70% and 30%, in February, 3, and March, 17, 2005, respectively, were tested in a complete block design with two replications. Plots without N application were used as control. Evaluation was done on continuous variable stocking in order to maintain 16% of forage allowance (16 kg DM/100 kg live weight [LW]). Grazing period extended from January, 21to May, 31. Studied variables were: stocking rate, DM disappearance, in % of LW, average daily gain, body score condition, weight gain per area and, pregnancy rate. The DM disappearance did not differ between treatments and periods of evaluation, presenting limited values in relation to the probable potential intake. The stocking rate showed positive effect of the level of N and did not differ along the evaluations. The other studied variables (body score condition, average daily gain and weight gain per area) presented significant variations between evaluation periods...

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Prenhez em rebanhos ovinos do Rio Grande do Sul-Brasil

Cited by 12 publications

References 2 publications

Performance and carcass quality in three genetic groups of sheep in Brazil

Performance and carcass quality in three genetic groups of sheep in Brazil

Dynamics of Sheep Production in Brazil

Recria de cordeiras em pastagem nativa melhorada submetida à fertilização nitrogenada: 2. Produção animal

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