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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
06/09/2016 |
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Data da última atualização: |
03/10/2016 |
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Autoria: |
LANGLANDS, J. P.; BOWLES, J. E.; DONALD, G. E.; SMITH, A. J.; PAULL, D. R.; HOLMES, P. R. |
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Título: |
Copper oxide particles for grazing sheep. |
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Ano de publicação: |
1983 |
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Fonte/Imprenta: |
Australian Journal of Agricultural Research, v. 34, n. 6, p. 751-765, 1983. |
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DOI: |
10.1071/AR9830751 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: In a series of experiments aimed at evaluating copper oxide as a supplement, grazing sheep were dosed with varying quantities of copper oxide particles up to 64 g, and the toxicity, the rate of particle excretion, and copper storage in the liver and other tissues were recorded. The toxicities (LD50) of copper oxide particles were 1.17 and 1.80 g/kg liveweight for two groups of grazing adult fine-wool Merino sheep. Death usually occurred 88-96 days after the oral administration of the particles; mean hepatic copper concentrations of sheep dying from copper toxicity were 4122-4308 mg/kg DM. The rate of faecal copper excretion of copper-supplemented sheep, expressed as a percentage of the dose, was less when 50 g of particles were given than when the dose was 5 or 10 g, but excretion patterns were variable. The quantity of hepatic copper stored per g of copper oxide given declined as the dose increased from 0 to 32 g, but increased again at higher doses. Hepatic copper concentration reached a maximum 2-3 months after dosing and the rate of decline was positively related to dose rate; thus, large doses of copper are unlikely to extend the period of elevated copper status. Large doses also increased whole blood copper concentrations and elevated plasma aspartate transaminase activities; this was taken to indicate copper poisoning. Tissue copper concentrations from sheep given up to 64 g particles are reported; liver was the most sensitive to copper treatment. Copper contents of the lung and kidney also responded to copper therapy, but carcass components such as leg, shoulder and muscle did not. Weaned lambs given 2 g of particles (c. 0.13 g/kg liveweight) grew significantly faster than unsupplemented lambs. This dose rate was approximately one-seventh of that predicted to cause 5% mortality, and it is concluded that, at appropriate dose rates, this method of supplementation did not increase mortality or cause excessive increases in tissue copper concentrations, and could increase growth rate. MenosAbstract: In a series of experiments aimed at evaluating copper oxide as a supplement, grazing sheep were dosed with varying quantities of copper oxide particles up to 64 g, and the toxicity, the rate of particle excretion, and copper storage in the liver and other tissues were recorded. The toxicities (LD50) of copper oxide particles were 1.17 and 1.80 g/kg liveweight for two groups of grazing adult fine-wool Merino sheep. Death usually occurred 88-96 days after the oral administration of the particles; mean hepatic copper concentrations of sheep dying from copper toxicity were 4122-4308 mg/kg DM. The rate of faecal copper excretion of copper-supplemented sheep, expressed as a percentage of the dose, was less when 50 g of particles were given than when the dose was 5 or 10 g, but excretion patterns were variable. The quantity of hepatic copper stored per g of copper oxide given declined as the dose increased from 0 to 32 g, but increased again at higher doses. Hepatic copper concentration reached a maximum 2-3 months after dosing and the rate of decline was positively related to dose rate; thus, large doses of copper are unlikely to extend the period of elevated copper status. Large doses also increased whole blood copper concentrations and elevated plasma aspartate transaminase activities; this was taken to indicate copper poisoning. Tissue copper concentrations from sheep given up to 64 g particles are reported; liver was the most sensitive to copper treatment. Copper con... Mostrar Tudo |
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Palavras-Chave: |
Copper oxide; Óxido de cobre. |
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Thesagro: |
Nutrição animal; Ovino; Pastejo; Suplemento mineral. |
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Thesaurus Nal: |
Sheep. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02760naa a2200277 a 4500
001 2052478
005 2016-10-03
008 1983 bl uuuu u00u1 u #d
024 7 $a10.1071/AR9830751$2DOI
100 1 $aLANGLANDS, J. P.
245 $aCopper oxide particles for grazing sheep.
260 $c1983
520 $aAbstract: In a series of experiments aimed at evaluating copper oxide as a supplement, grazing sheep were dosed with varying quantities of copper oxide particles up to 64 g, and the toxicity, the rate of particle excretion, and copper storage in the liver and other tissues were recorded. The toxicities (LD50) of copper oxide particles were 1.17 and 1.80 g/kg liveweight for two groups of grazing adult fine-wool Merino sheep. Death usually occurred 88-96 days after the oral administration of the particles; mean hepatic copper concentrations of sheep dying from copper toxicity were 4122-4308 mg/kg DM. The rate of faecal copper excretion of copper-supplemented sheep, expressed as a percentage of the dose, was less when 50 g of particles were given than when the dose was 5 or 10 g, but excretion patterns were variable. The quantity of hepatic copper stored per g of copper oxide given declined as the dose increased from 0 to 32 g, but increased again at higher doses. Hepatic copper concentration reached a maximum 2-3 months after dosing and the rate of decline was positively related to dose rate; thus, large doses of copper are unlikely to extend the period of elevated copper status. Large doses also increased whole blood copper concentrations and elevated plasma aspartate transaminase activities; this was taken to indicate copper poisoning. Tissue copper concentrations from sheep given up to 64 g particles are reported; liver was the most sensitive to copper treatment. Copper contents of the lung and kidney also responded to copper therapy, but carcass components such as leg, shoulder and muscle did not. Weaned lambs given 2 g of particles (c. 0.13 g/kg liveweight) grew significantly faster than unsupplemented lambs. This dose rate was approximately one-seventh of that predicted to cause 5% mortality, and it is concluded that, at appropriate dose rates, this method of supplementation did not increase mortality or cause excessive increases in tissue copper concentrations, and could increase growth rate.
650 $aSheep
650 $aNutrição animal
650 $aOvino
650 $aPastejo
650 $aSuplemento mineral
653 $aCopper oxide
653 $aÓxido de cobre
700 1 $aBOWLES, J. E.
700 1 $aDONALD, G. E.
700 1 $aSMITH, A. J.
700 1 $aPAULL, D. R.
700 1 $aHOLMES, P. R.
773 $tAustralian Journal of Agricultural Research$gv. 34, n. 6, p. 751-765, 1983.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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Registro Completo
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Biblioteca(s): |
Embrapa Hortaliças. |
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Data corrente: |
13/11/2002 |
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Data da última atualização: |
13/11/2002 |
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Autoria: |
MAROUELLI, W. A.; SILVA, W. L. C.; MORETTI, C. L. |
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Afiliação: |
Embrapa Hortaliças, Brasília, DF. |
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Título: |
Desenvolvimento de plantas, produção e qualidade de bulbos de alho sob condições de deficiência de água no solo. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Horticultura Brasileira, Brasília, DF, v. 20, n. 3, p. 470-473, set. 2002. |
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Idioma: |
Português |
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Palavras-Chave: |
Brasil; Brasília; Distrito Federal. |
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Thesagro: |
Água; Alho; Allium Sativum; Cerrado; Deficiência; Irrigação; Solo. |
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Thesaurus NAL: |
Brazil; garlic; irrigation; soil; water. |
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Categoria do assunto: |
-- |
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URL: |
https://www.scielo.br/scielo.php?script=sci_pdf&pid=S0102-05362002000300014&lng=pt&nrm=iso&tlng=pt
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Marc: |
LEADER 00840naa a2200313 a 4500
001 1772544
005 2002-11-13
008 2002 bl uuuu u00u1 u #d
100 1 $aMAROUELLI, W. A.
245 $aDesenvolvimento de plantas, produção e qualidade de bulbos de alho sob condições de deficiência de água no solo.
260 $c2002
650 $aBrazil
650 $agarlic
650 $airrigation
650 $asoil
650 $awater
650 $aÁgua
650 $aAlho
650 $aAllium Sativum
650 $aCerrado
650 $aDeficiência
650 $aIrrigação
650 $aSolo
653 $aBrasil
653 $aBrasília
653 $aDistrito Federal
700 1 $aSILVA, W. L. C.
700 1 $aMORETTI, C. L.
773 $tHorticultura Brasileira, Brasília, DF$gv. 20, n. 3, p. 470-473, set. 2002.
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Embrapa Hortaliças (CNPH) |
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