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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
24/08/1995 |
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Data da última atualização: |
16/07/2012 |
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Autoria: |
CLARK, K. W.; MOTT, G. O. |
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Título: |
The dry matter digestion in vitro of forage crops. |
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Ano de publicação: |
1960 |
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Fonte/Imprenta: |
Canadian Journal of Plant Science, v.40, n.1, p.123-129, Jan.1960. |
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Idioma: |
Inglês |
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Conteúdo: |
An artificial rumen technique was evaluated as a method of determining the dry matter digestion of forages. The digestibility estimates obtained in the spring were significantly correlated (r = 0.77xx) with estimates obtained on these forages from a conventional digestion trials, whereas in the fall the coefficients were low and longer significantly correlated ( r = 0.49) with the conventional trial data. A medium maturing timothy polycross nursey was harvested at 10-day intervals throughout the first growth cycle. With the exception of the April 14th stage there were no significant differences in digestibility between the clones harvested in the early-leaf stage. Significant differences between selections were obtained in digestibility at later stages of maturity which may be a function of the leaf-stem ratio, the amount of leaf firing and thickness of the culms as well as changes in chemical composition. The per cent fructose content of this timothy herbage was significantly correlated (r = 0.78xx) with the dry matter digestibility only at the first stage of cutting. Changes in dry matter digestion using this artificial rumen technique were observed, with
digestion estimates being higher during the spring and summer than during fall and winter. The method of drying herbage for these in vitro digestion experiments was studied with the conclusion that there was a significant difference in favour of freeze-drying. The dry matter digestion coefficients of the freeze-dried herbage were comparable to those expected for herbage of such qualitydigested in vivo. The use of an artificial rumen technique for estimating digestibility of clonal material shows promise for the plant breeder, providing certain precautions are taken. All lines to be screened should be included in a single trial to ensure maximum control of variables associated withtechnique. Samples should be uniformly processed, preferably freeze-dried, and digested with a single sample of rumen fluid. MenosAn artificial rumen technique was evaluated as a method of determining the dry matter digestion of forages. The digestibility estimates obtained in the spring were significantly correlated (r = 0.77xx) with estimates obtained on these forages from a conventional digestion trials, whereas in the fall the coefficients were low and longer significantly correlated ( r = 0.49) with the conventional trial data. A medium maturing timothy polycross nursey was harvested at 10-day intervals throughout the first growth cycle. With the exception of the April 14th stage there were no significant differences in digestibility between the clones harvested in the early-leaf stage. Significant differences between selections were obtained in digestibility at later stages of maturity which may be a function of the leaf-stem ratio, the amount of leaf firing and thickness of the culms as well as changes in chemical composition. The per cent fructose content of this timothy herbage was significantly correlated (r = 0.78xx) with the dry matter digestibility only at the first stage of cutting. Changes in dry matter digestion using this artificial rumen technique were observed, with
digestion estimates being higher during the spring and summer than during fall and winter. The method of drying herbage for these in vitro digestion experiments was studied with the conclusion that there was a significant difference in favour of freeze-drying. The dry matter digestion coefficients of the freeze-dried he... Mostrar Tudo |
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Palavras-Chave: |
Colheita de forragem; Dry matter; Pasture. |
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Thesagro: |
Digestibilidade; Matéria Seca; Pastagem. |
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Thesaurus Nal: |
digestibility; forage crops. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02592naa a2200229 a 4500
001 1785804
005 2012-07-16
008 1960 bl --- 0-- u #d
100 1 $aCLARK, K. W.
245 $aThe dry matter digestion in vitro of forage crops.
260 $c1960
520 $aAn artificial rumen technique was evaluated as a method of determining the dry matter digestion of forages. The digestibility estimates obtained in the spring were significantly correlated (r = 0.77xx) with estimates obtained on these forages from a conventional digestion trials, whereas in the fall the coefficients were low and longer significantly correlated ( r = 0.49) with the conventional trial data. A medium maturing timothy polycross nursey was harvested at 10-day intervals throughout the first growth cycle. With the exception of the April 14th stage there were no significant differences in digestibility between the clones harvested in the early-leaf stage. Significant differences between selections were obtained in digestibility at later stages of maturity which may be a function of the leaf-stem ratio, the amount of leaf firing and thickness of the culms as well as changes in chemical composition. The per cent fructose content of this timothy herbage was significantly correlated (r = 0.78xx) with the dry matter digestibility only at the first stage of cutting. Changes in dry matter digestion using this artificial rumen technique were observed, with digestion estimates being higher during the spring and summer than during fall and winter. The method of drying herbage for these in vitro digestion experiments was studied with the conclusion that there was a significant difference in favour of freeze-drying. The dry matter digestion coefficients of the freeze-dried herbage were comparable to those expected for herbage of such qualitydigested in vivo. The use of an artificial rumen technique for estimating digestibility of clonal material shows promise for the plant breeder, providing certain precautions are taken. All lines to be screened should be included in a single trial to ensure maximum control of variables associated withtechnique. Samples should be uniformly processed, preferably freeze-dried, and digested with a single sample of rumen fluid.
650 $adigestibility
650 $aforage crops
650 $aDigestibilidade
650 $aMatéria Seca
650 $aPastagem
653 $aColheita de forragem
653 $aDry matter
653 $aPasture
700 1 $aMOTT, G. O.
773 $tCanadian Journal of Plant Science$gv.40, n.1, p.123-129, Jan.1960.
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Registro original: |
Embrapa Pantanal (CPAP) |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
18/07/2022 |
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Data da última atualização: |
06/12/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
BILLER, J. D.; CHAGAS, E. C. |
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Afiliação: |
JAQUELINE D. BILLER; EDSANDRA CAMPOS CHAGAS, CPAA. |
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Título: |
Mechanisms of resistance and tolerance against parasites in fish: the impairments caused by Neoechinorhynchus buttnerae in Colossoma macropomum. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Anais da Academia Brasileira de Ciências, v. 94, n. 4, art. e20210258, 2022. |
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DOI: |
https://doi.org/10.1590/0001-3765202220210258 |
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Idioma: |
Inglês |
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Conteúdo: |
Tambaqui is the second native fi sh most produced species in Brazil. Currently, tambaqui fi sh farms deals with serious sanitary problems due to the prevalence of the parasite Neoechinorhynchus buttnerae. However, the prevalence of the acanthocephalan parasite infections depends on the resistance and tolerance interactions between the host organisms and parasites. The immune response against parasites is divided between innate and acquired immunity. The innate defense is a result of physical barriers, cellular and humoral compounds. Acquired defense occurs through the production of antibodies (humoral) and is mediated by cells, mainly by type 2 T helper lymphocytes. Most parasites secrete a variety of immunomodulatory compounds that allow coexistence with the host and chronicity of the parasite. The host-parasite relationship is complex and makes prevention and treatment diffi cult. However, some studies show that the use of immunostimulants may have "systemic" effects. These include improvement of the intestinal mucosa health and also in the production of cellular and humoral compounds in the whole body, thus assisting treatment and control. As such, it is important to understand the mechanisms of resistance and tolerance in the host organisms so that prevention and treatment measures can be effective. |
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Thesagro: |
Tambaqui. |
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Thesaurus NAL: |
Acanthocephala; Immunity; Immunomodulation. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1144767/1/Mechanisms-of-resistance.pdf
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Marc: |
LEADER 02003naa a2200193 a 4500
001 2144767
005 2022-12-06
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1590/0001-3765202220210258$2DOI
100 1 $aBILLER, J. D.
245 $aMechanisms of resistance and tolerance against parasites in fish$bthe impairments caused by Neoechinorhynchus buttnerae in Colossoma macropomum.$h[electronic resource]
260 $c2022
520 $aTambaqui is the second native fi sh most produced species in Brazil. Currently, tambaqui fi sh farms deals with serious sanitary problems due to the prevalence of the parasite Neoechinorhynchus buttnerae. However, the prevalence of the acanthocephalan parasite infections depends on the resistance and tolerance interactions between the host organisms and parasites. The immune response against parasites is divided between innate and acquired immunity. The innate defense is a result of physical barriers, cellular and humoral compounds. Acquired defense occurs through the production of antibodies (humoral) and is mediated by cells, mainly by type 2 T helper lymphocytes. Most parasites secrete a variety of immunomodulatory compounds that allow coexistence with the host and chronicity of the parasite. The host-parasite relationship is complex and makes prevention and treatment diffi cult. However, some studies show that the use of immunostimulants may have "systemic" effects. These include improvement of the intestinal mucosa health and also in the production of cellular and humoral compounds in the whole body, thus assisting treatment and control. As such, it is important to understand the mechanisms of resistance and tolerance in the host organisms so that prevention and treatment measures can be effective.
650 $aAcanthocephala
650 $aImmunity
650 $aImmunomodulation
650 $aTambaqui
700 1 $aCHAGAS, E. C.
773 $tAnais da Academia Brasileira de Ciências$gv. 94, n. 4, art. e20210258, 2022.
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Embrapa Amazônia Ocidental (CPAA) |
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