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| Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
15/02/1996 |
Data da última atualização: |
07/11/2023 |
Autoria: |
CASIDA, L. E.; WARWICK, E. J.; MEYER, R. K. |
Título: |
Survival of multiple pregnancies induced in the ewe following treatment with pituitary gonadotropins |
Ano de publicação: |
1944 |
Fonte/Imprenta: |
Journal of Animal Science, v. 3, n. 1, p. 22-28, Feb. 1944. |
Idioma: |
Inglês |
Conteúdo: |
Abstract: Follicle-stimulating and luteinizing extracts of sheep pituitary powder have been used to induce superovulation in 25 ewes. Treatment began the twelfth day of the estrous cycle and terminated five days later at the time of natural estrus. All ewes were mated or artificially inseminated. The viability of the artificially induced multiple pregnancies was checked by observations on different animals at 2 to 5 days, 14 to 27 days, and 30 to 37 days. The numbers of ewes found to be pregnant at the different intervals were 6 of 7, 8 of 10, and 5 of 8, respectively. An average of 9.2 nomral embryos per ewe, representing 70% of the eggs ovulated, was found in the first period, 3.4 in the second period, and 0.8 in the third. Many dead and degenerate embryos were found in the later stages. The corpora lutea numbers of 20.8, 23.2, and 24.6 for the three groups were essentially the same, and it is believed that the initial ovulation and fertilization rates were comparable. Two possible causes of death are suggested: (1) inadequate uterine environment due either to a direct or an indirect effect of treatment, or (2) abnormalities induced in the ova by the rapid maturation of follicles. In an attempt to obtain information on the cause of death 26 fertilized ova from treated ewes were transplanted to normal ewes at comparable stages of the estrous cycle. Only three of these survived long enough to interrupt the estrous cycle of the host ewes, but the efficiency of the transplantation technique is unknown, so no conclusion as to their viability is possible. MenosAbstract: Follicle-stimulating and luteinizing extracts of sheep pituitary powder have been used to induce superovulation in 25 ewes. Treatment began the twelfth day of the estrous cycle and terminated five days later at the time of natural estrus. All ewes were mated or artificially inseminated. The viability of the artificially induced multiple pregnancies was checked by observations on different animals at 2 to 5 days, 14 to 27 days, and 30 to 37 days. The numbers of ewes found to be pregnant at the different intervals were 6 of 7, 8 of 10, and 5 of 8, respectively. An average of 9.2 nomral embryos per ewe, representing 70% of the eggs ovulated, was found in the first period, 3.4 in the second period, and 0.8 in the third. Many dead and degenerate embryos were found in the later stages. The corpora lutea numbers of 20.8, 23.2, and 24.6 for the three groups were essentially the same, and it is believed that the initial ovulation and fertilization rates were comparable. Two possible causes of death are suggested: (1) inadequate uterine environment due either to a direct or an indirect effect of treatment, or (2) abnormalities induced in the ova by the rapid maturation of follicles. In an attempt to obtain information on the cause of death 26 fertilized ova from treated ewes were transplanted to normal ewes at comparable stages of the estrous cycle. Only three of these survived long enough to interrupt the estrous cycle of the host ewes, but the efficiency of the transplanta... Mostrar Tudo |
Palavras-Chave: |
Inducao hormonal. |
Thesagro: |
Ovino; Prenhez; Reprodução; Superovulação. |
Thesaurus Nal: |
Ewes; Follicle-stimulating hormone; Ovulation; Pregnancy; Reproduction; Sheep; Superovulation. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02383naa a2200289 a 4500 001 1522981 005 2023-11-07 008 1944 bl uuuu u00u1 u #d 100 1 $aCASIDA, L. E. 245 $aSurvival of multiple pregnancies induced in the ewe following treatment with pituitary gonadotropins$h[electronic resource] 260 $c1944 520 $aAbstract: Follicle-stimulating and luteinizing extracts of sheep pituitary powder have been used to induce superovulation in 25 ewes. Treatment began the twelfth day of the estrous cycle and terminated five days later at the time of natural estrus. All ewes were mated or artificially inseminated. The viability of the artificially induced multiple pregnancies was checked by observations on different animals at 2 to 5 days, 14 to 27 days, and 30 to 37 days. The numbers of ewes found to be pregnant at the different intervals were 6 of 7, 8 of 10, and 5 of 8, respectively. An average of 9.2 nomral embryos per ewe, representing 70% of the eggs ovulated, was found in the first period, 3.4 in the second period, and 0.8 in the third. Many dead and degenerate embryos were found in the later stages. The corpora lutea numbers of 20.8, 23.2, and 24.6 for the three groups were essentially the same, and it is believed that the initial ovulation and fertilization rates were comparable. Two possible causes of death are suggested: (1) inadequate uterine environment due either to a direct or an indirect effect of treatment, or (2) abnormalities induced in the ova by the rapid maturation of follicles. In an attempt to obtain information on the cause of death 26 fertilized ova from treated ewes were transplanted to normal ewes at comparable stages of the estrous cycle. Only three of these survived long enough to interrupt the estrous cycle of the host ewes, but the efficiency of the transplantation technique is unknown, so no conclusion as to their viability is possible. 650 $aEwes 650 $aFollicle-stimulating hormone 650 $aOvulation 650 $aPregnancy 650 $aReproduction 650 $aSheep 650 $aSuperovulation 650 $aOvino 650 $aPrenhez 650 $aReprodução 650 $aSuperovulação 653 $aInducao hormonal 700 1 $aWARWICK, E. J. 700 1 $aMEYER, R. K. 773 $tJournal of Animal Science$gv. 3, n. 1, p. 22-28, Feb. 1944.
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Registro Completo
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
18/11/2021 |
Data da última atualização: |
09/01/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 4 |
Autoria: |
BIELUCZYK, W.; PICCOLO, M. DE C.; PEREIRA, M. G.; LAMBAIS, G. R.; MORAES, M. T. DE; SOLTANGHEISI, A.; BERNARDI, A. C. de C.; PEZZOPANE, J. R. M.; BOSI, C.; CHERUBIN, M. R. |
Afiliação: |
WANDERLEI BIELUCZYK, USP; MARISA DE CÁSSIA PICCOLO, USP; MARCOS GERVASIO PEREIRA, UFRRJ; GEORGE RODRIGUES LAMBAIS, National Institute of Semiarid; MOACIR TUZZIN DE MORAES, Federal University of Technology-Parana; AMIN SOLTANGHEISI, Lancaster Environment Centre; ALBERTO CARLOS DE CAMPOS BERNARDI, CPPSE; JOSE RICARDO MACEDO PEZZOPANE, CPPSE; CRISTIAM BOSI, USP; MAURÍCIO ROBERTO CHERUBIN, USP. |
Título: |
Eucalyptus tree influence on spatial and temporal dynamics of fine root growth in an integrated crop livestock forestry system in southeastern Brazil. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Rhizosphere, v.1 9, sep., 2021, 100415. |
DOI: |
https://doi.org/10.1016/j.rhisph.2021.100415 |
Idioma: |
Inglês |
Conteúdo: |
Integrated farming systems are promising strategies towards land-use efficiency and sustainable agriculture. The integrated crop-livestock-forestry (ICLF) system stablish complex interactions were synergies or competition depend on the arrangements throughout time and space. Fine root (≤2 mm) growth dynamics of crops, pasture and trees remains unclear when these species are integrated. We aimed to assess root growth dynamics after Eucalyptus urograndis introduction into an integrated crop-livestock (ICL) system. Previous ICL area was used as a reference. We assessed ICLF 1.9, 4.3 and 7.5 m distances from tree rows, starting the study when trees had three years of age. Eucalyptus rows were spaced 15 m apart and integrated to annual crops and pasture. We evaluated the root growth under two different successional periods: (i) corn cultivation interspaced with palisade grass (Urochloa brizantha); and (ii) a pasture, when palisade grass was grazed. We tracked fine root length using the minirhizotron technique, capturing 3200 images scanning up to 70 cm soil depth. Data of photosynthetically active radiation (PAR) transmission, soil bulk density, rainfall and air temperature were used as complementary information to support the discussion. Our results showed that Eucalyptus trees impaired root growth of annual crops cultivated in the interrow position, regardless of distance from the row. From 31 to 80 days after corn germination, root length production in ICLF was reduced by 120?179 cm m−2.d−1 along the tree interrow space. For the pasture period, total produced root length density reduced 6% at 1.9 m but increased 25% at 4.3 and 7.5 m, when compared to ICL. Shade of Eucalyptus trees at ICLF 1.9 m position, with PAR transmission mainly below 60%, sharply impaired root growth. Eucalyptus roots represented 12% from total root length produced in ICLF system, and 38% of these roots had positive ectomycorrhizal status. In conclusion, under Eucalyptus trees higher than 20 m, pasture of palisade grass is more adaptable than corn when considering the root growth dynamics of our studied ICLF arrangement. Based on our findings, corn intercropped with palisade grass should not be introduced in future management of the ICLF system, unless part of the trees is chopped to reduce light competition. However, implemented pasture of palisade grass showed belowground synergies with Eucalyptus, increasing root growth in intermediary interrow positions and emerging new fungal symbiosis, which could be playing important functions in soil, as soil carbon storage and nutrient cycling. MenosIntegrated farming systems are promising strategies towards land-use efficiency and sustainable agriculture. The integrated crop-livestock-forestry (ICLF) system stablish complex interactions were synergies or competition depend on the arrangements throughout time and space. Fine root (≤2 mm) growth dynamics of crops, pasture and trees remains unclear when these species are integrated. We aimed to assess root growth dynamics after Eucalyptus urograndis introduction into an integrated crop-livestock (ICL) system. Previous ICL area was used as a reference. We assessed ICLF 1.9, 4.3 and 7.5 m distances from tree rows, starting the study when trees had three years of age. Eucalyptus rows were spaced 15 m apart and integrated to annual crops and pasture. We evaluated the root growth under two different successional periods: (i) corn cultivation interspaced with palisade grass (Urochloa brizantha); and (ii) a pasture, when palisade grass was grazed. We tracked fine root length using the minirhizotron technique, capturing 3200 images scanning up to 70 cm soil depth. Data of photosynthetically active radiation (PAR) transmission, soil bulk density, rainfall and air temperature were used as complementary information to support the discussion. Our results showed that Eucalyptus trees impaired root growth of annual crops cultivated in the interrow position, regardless of distance from the row. From 31 to 80 days after corn germination, root length production in ICLF was reduced b... Mostrar Tudo |
Palavras-Chave: |
Eucalyptus interrows; ILPF; Integrated farming systems; Minirhizotron; Root system. |
Thesaurus NAL: |
Alley cropping. |
Categoria do assunto: |
A Sistemas de Cultivo |
Marc: |
LEADER 03605naa a2200313 a 4500 001 2136265 005 2024-01-09 008 2021 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.rhisph.2021.100415$2DOI 100 1 $aBIELUCZYK, W. 245 $aEucalyptus tree influence on spatial and temporal dynamics of fine root growth in an integrated crop livestock forestry system in southeastern Brazil.$h[electronic resource] 260 $c2021 520 $aIntegrated farming systems are promising strategies towards land-use efficiency and sustainable agriculture. The integrated crop-livestock-forestry (ICLF) system stablish complex interactions were synergies or competition depend on the arrangements throughout time and space. Fine root (≤2 mm) growth dynamics of crops, pasture and trees remains unclear when these species are integrated. We aimed to assess root growth dynamics after Eucalyptus urograndis introduction into an integrated crop-livestock (ICL) system. Previous ICL area was used as a reference. We assessed ICLF 1.9, 4.3 and 7.5 m distances from tree rows, starting the study when trees had three years of age. Eucalyptus rows were spaced 15 m apart and integrated to annual crops and pasture. We evaluated the root growth under two different successional periods: (i) corn cultivation interspaced with palisade grass (Urochloa brizantha); and (ii) a pasture, when palisade grass was grazed. We tracked fine root length using the minirhizotron technique, capturing 3200 images scanning up to 70 cm soil depth. Data of photosynthetically active radiation (PAR) transmission, soil bulk density, rainfall and air temperature were used as complementary information to support the discussion. Our results showed that Eucalyptus trees impaired root growth of annual crops cultivated in the interrow position, regardless of distance from the row. From 31 to 80 days after corn germination, root length production in ICLF was reduced by 120?179 cm m−2.d−1 along the tree interrow space. For the pasture period, total produced root length density reduced 6% at 1.9 m but increased 25% at 4.3 and 7.5 m, when compared to ICL. Shade of Eucalyptus trees at ICLF 1.9 m position, with PAR transmission mainly below 60%, sharply impaired root growth. Eucalyptus roots represented 12% from total root length produced in ICLF system, and 38% of these roots had positive ectomycorrhizal status. In conclusion, under Eucalyptus trees higher than 20 m, pasture of palisade grass is more adaptable than corn when considering the root growth dynamics of our studied ICLF arrangement. Based on our findings, corn intercropped with palisade grass should not be introduced in future management of the ICLF system, unless part of the trees is chopped to reduce light competition. However, implemented pasture of palisade grass showed belowground synergies with Eucalyptus, increasing root growth in intermediary interrow positions and emerging new fungal symbiosis, which could be playing important functions in soil, as soil carbon storage and nutrient cycling. 650 $aAlley cropping 653 $aEucalyptus interrows 653 $aILPF 653 $aIntegrated farming systems 653 $aMinirhizotron 653 $aRoot system 700 1 $aPICCOLO, M. DE C. 700 1 $aPEREIRA, M. G. 700 1 $aLAMBAIS, G. R. 700 1 $aMORAES, M. T. DE 700 1 $aSOLTANGHEISI, A. 700 1 $aBERNARDI, A. C. de C. 700 1 $aPEZZOPANE, J. R. M. 700 1 $aBOSI, C. 700 1 $aCHERUBIN, M. R. 773 $tRhizosphere$gv.1 9, sep., 2021, 100415.
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