Metabolismo ósseo de vacas jovens Nelore em pastos de Brachiaria brizantha suplementadas ou não durante a seca com fósforo/cálcio e concentrado

Nicodemo, M. L. F.; Moraes, Sheila da Silva; Thiago, L. R. L. de S.; Caxias, Elizângela Luiz; Macedo, M. C. M.; Pires, Pedro; Madruga, C. R.; Vaz, E. C.; Barrocas, Gustavo Eugênio

doi:10.1590/s1516-35982005000100036

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…Studies in mice have shown the effects of food restriction on bone growth, with the reduction in bone formation, in addition to the decreased cellularity, cell size and cellular composition changes in bone [19]. The animals of this study were notably malnourished (ICC 1 and 2), and known to be from regions where the lack of minerals in soils and pastures is common [10,24].…”

Section: Discussionmentioning

confidence: 99%

Bone Radiographic Changes in Slaughter Buffalos with Low Body Condition Index

Junior

Pereira

Muniz³

et al. 2017

Acta Scientiae. Vet.

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Background:The largest buffalo herd in Brazil is located on the Island of Marajó, in the State of Pará, northern Brazil. The pastures of the Island of Marajó consist of low quality graminaceous plants, which are generally poor in protein and mineral content. Unbalanced diets associated with low quality pastures are responsible for latent, sub-clinical diseases and metabolic disorders in bovines which affect bone health, especially in periods such as pregnancy and lactation. The purpose of this study was to point out and to describe the radiographic bone changes of buffalos with low body index bred in extensive system and intended for slaughter on the Island of Marajó, Brazil. Materials, Methods & Results: Radiographic examinations of anatomical pieces were obtained from 34 animals of buffalo species, with no distinction of gender, age, or breed. The animals were selected among those that were in the stockyard waiting for slaughtering for the obtainment of the anatomical pieces. For this selection, low physical condition was considered, which mainly included individuals with body condition indexes (ICC) of 1 and 2, on a scale of 1 to 5. From this selection, 98 anatomical pieces were obtained, which included: 28 sets of ribs, 20 femurs, 26 metacarpus, 7 mandibles, 3 radius and ulnas, 4 sets of vertebrae, 4 sets of metacarpus and phalanges, 1 tarsus and 1 set of tarsus and metatarsus. All the pieces were separated, identified, packed in plastic bag and forwarded to the radiographic study. At least one radiographic projection was obtained of each anatomical piece. These were identified, manually processed and stored for subsequent assessment. A single observer, in order to identify and to describe the bone radiographic changes, subjectively performed the radiographic assessment. Discussion: Bone changes were remarkable and in animals of this study, reinforcing the nutritional aspect as being of great importance for the perfect mineral homeostasis and for the osteoarticular system maintenance. Consistent radiographic findings with osteopenia are most often related to nutritional disorders that affect bone metabolism, mainly involving the homeostasis of calcium (Ca) and phosphorus (P). The nutritional hyperparathyroidism, more commonly reported in dogs, cats and exotic animals is a common example of these affections, in which the bone radiopacity reduction is the most evident radiographic aspect. Copper (Cu) deficiency has been correlated with osteochondrosis, epiphyseal fracture of the femoral head and degenerative arthropathy of the hip joint, and erosion of the articular cartilage in a deer (Cervu selaphus). Degenerative arthropathy through radiographs was also found in this study. From the bone radiographic analysis, it is concluded that the osteodystrophic diseases of buffalos raised in pasture system on the Island of Marajó, Pará, Brazil, present a variety of pathological conditions and the most commonly found were: osteoporosis characterized at the radiographic examination for the bone decreased radiop...

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Section: Discussionmentioning

confidence: 99%

Bone Radiographic Changes in Slaughter Buffalos with Low Body Condition Index

Junior

Pereira

Muniz³

et al. 2017

Acta Scientiae. Vet.

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“…A osteocalcina teve comportamento semelhante ao do fósforo inorgânico, resultados que confirmam os obtidos por Naito et al (1990). Nicodemo et al (2005) estudaram diferentes tipos de suplementos e encontraram concentrações semelhantes de osteocalcina em vacas após o terço final de lactação. As concentrações de osteocalcina estão relacionadas à quantidade de osteocalcina que entra na circulação sanguínea, que depende da taxa de secreção individual dos osteoblastos e do número de osteoblastos que secretam a proteína (Nielsen, 1994).…”

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Fontes de fósforo em suplementos minerais para bovinos de corte em pastagem de Cynodon nlemfuensis Vanderyst

Teixeira¹,

Branco²,

Granzotto³

et al. 2011

R. Bras. Zootec.

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RESUMO -O experimento foi conduzido para avaliar quatro fontes de fósforo para bovinos em pastagem de grama-estrela roxa (Cynodon nlemfuensis Vanderyst) e compará-las considerando o desempenho ponderal e os parâmetros fisiológicos. O delineamento experimental foi o inteiramente casualizado, utilizando 32 animais mestiços (zebuíno × taurino), com peso inicial médio de 347 kg, distribuídos ao acaso em quatro grupos, cada um recebendo suplemento mineral formulado com fosfato bicálcico, superfosfato triplo, fosfato monoamônio e fosfato de rocha de Araxá. O ganho de peso por hectare diferiu entre as datas de avaliação e teve redução significativa no último período, mas não entre as fontes de fósforo. O ganho médio diário não diferiu entre as fontes de fósforo e foi de 0,67; 0,65; 0,63 e 0,56 kg/dia, respectivamente, para fosfato bicálcico, superfosfato triplo, fosfato monoamônio e fosfato de rocha Araxá. As concentrações de osteocalcina mantiveram-se em níveis baixos (47,67 ng/mL) e foram semelhantes entre as fontes de fósforo. As fontes de fósforo foram eficientes em manter níveis adequados de fósforo no soro, com média de 7,03 mg/100 mL. Average daily gain did not differ among sources of phosphorus and it was 0.67; 0.65; 0.63 and 0.56 kg/day, respectively for dicalcium phosphate, supertriple phosphate, monoammonium phosphate and Araxá rock phosphate. Concentrations of osteocalcin were kept in low levels (47.67 ng/mL) and they were similar among sources of phosphorus. Sources of phosphorus were efficient in keeping appropriate levels of phosphorus in serum, with an average of 7.03 mg/100 mL. IntroduçãoOs sistemas pecuários brasileiros são caracterizados pela utilização de pastagens como principal alimento para o rebanho. As pastagens assumem dois aspectos importantes, viabilizam a competitividade brasileira e possibilitam a produção de forma natural, com respeito ao ambiente e aos animais (Euclides & Medeiros, 2005).As gramíneas do gênero Cynodon, constituídas por espécies e cultivares de ampla adaptação às diferentes condições edafoclimáticas (Oliveira et al., 2000), e portanto, importantes para a exploração pecuária bovina brasileira. No Brasil, o ciclo anual na produção de carne bovina pode ser dividido em dois períodos: o período das águas, quando a alta produção de forragem de qualidade resulta em elevada produção animal, e o período das secas, quando a produção limitada de pastagens retarda o crescimento animal ou provoca, até mesmo, perdas de peso.Entre as causas da baixa produtividade do rebanho, a carência de minerais ocupa lugar de destaque. Na maioria das situações, as forrageiras não atendem integralmente às exigências dos animais em pastejo. O teor de minerais nas R. Bras.

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Dietary supplementation for Santa Inês hair ewes on pasture at pre- and postpartum periods: dry matter intake, digestibility, milk production, and mineral metabolism

Sousa

Araújo

Silva

et al. 2018

Trop Anim Health Prod

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The aim of this study was to evaluate the impact of different levels of dietary supplementation and reproductive stages on dry matter intake, digestibility, milk production, and mineral metabolism in Santa Inês hair ewes. Two dietary supplement levels of 0.5 and 1.5%, based on body weight, were used. A total of 12 hair ewes (six subjected to 0.5 and six subjected to 1.5% of concentrate supplementation based on body weight-BW) of the Santa Inês breed were evaluated in a completely randomized design with fixed effects of supplementation level, period, and its interactions. Dry matter intake, digestibility, milk production, and mineral metabolism (calcium (Ca), phosphorus (P), magnesium (Mg), alkaline phosphatase (ALP), type I insulin-like growth factor (IGF-I), parathyroid hormone (PTH), and osteocalcin (OC)) were assessed. Dry matter digestibility was affected by the supplementation level (during both pregnancy and lactation), with higher values in ewes fed at a level of 1.5% of BW. A significant interaction between treatment × reproductive stages was found for the Mg concentration. A period effect (P < 0.05) on serum concentrations of P, Ca/P, Mg, and IGF-I was observed. Serum P concentrations were influenced (P < 0.05) by treatments and reproductive stages. There were significant differences in the Ca/P ratio among the reproductive stages. The enzymatic activity of ALP and serum IGFI differed among reproductive stages. Ewes supplemented at a level of 1.5% of BW produced 18.5% more milk than ewes supplemented at a level of 0.5% of BW. The use of 0.5% of body weight in concentrate supplementation is recommended for the reduction of production costs, without having an effect on the mineral metabolism of Santa Inês hair ewes.

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Metabolismo ósseo de vacas jovens Nelore em pastos de Brachiaria brizantha suplementadas ou não durante a seca com fósforo/cálcio e concentrado

Cited by 3 publications

References 35 publications

Bone Radiographic Changes in Slaughter Buffalos with Low Body Condition Index

Bone Radiographic Changes in Slaughter Buffalos with Low Body Condition Index

Fontes de fósforo em suplementos minerais para bovinos de corte em pastagem de Cynodon nlemfuensis Vanderyst

Dietary supplementation for Santa Inês hair ewes on pasture at pre- and postpartum periods: dry matter intake, digestibility, milk production, and mineral metabolism

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