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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
15/02/1995 |
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Data da última atualização: |
06/04/2017 |
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Autoria: |
LAMB, J. A.; DORAN, J. W.; PETERSON, G. A. |
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Título: |
Nonsymbiotic dinitrogen fixation in no-till and conventional wheat-fallow systems. |
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Ano de publicação: |
1987 |
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Fonte/Imprenta: |
Soil Science Society America Journal, v.51, p.356-361, 1987. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to determine if differences in non-symbiotic N2 fixation could account for the positive N budgets in the plant-soil system of no-till soils as compared with balanced or negative budgets under conventional tillage conditions (stubble mulch and plow) in a winter wheat (Triticum aestivum L.) crop-fallow rotation. This study was conducted on a Duroc sit loam (fine silty, mixed, mesic, Pachic Haplustolls) in western Nebraska from May 1982 to September 1983. Nonsymbiotic N2 fixation was estimated using the C2H2 reduction assay on intact soil cores from plow, stuble mulch,no-till, and native sod management pratices. Nitrogen fixation potentials of no-till soils were twofold greater than those of plowed ans were positively corrlated with higher soil-water contents for reduced tillage. The amount of N2 fixed during one cycle of the wheat-fallow rotation, however, as calculated from the C2H2 reduction assay, was 0.33 kg N ha-1yr-1, which falls far short of the positive budget of 26 kg N ha-1yr found in the no-till soil. Lower incubation temperatures, which simulated soil temperatures of tillage systems in the field, resulted in an even lower fixation than at 25oC. |
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Palavras-Chave: |
Fixacao; Fixation; Plant; Triticum aestivum L. |
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Thesagro: |
Planta; Solo. |
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Thesaurus Nal: |
soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01801naa a2200229 a 4500
001 1783844
005 2017-04-06
008 1987 bl --- 0-- u #d
100 1 $aLAMB, J. A.
245 $aNonsymbiotic dinitrogen fixation in no-till and conventional wheat-fallow systems.
260 $c1987
520 $aThe objective of this study was to determine if differences in non-symbiotic N2 fixation could account for the positive N budgets in the plant-soil system of no-till soils as compared with balanced or negative budgets under conventional tillage conditions (stubble mulch and plow) in a winter wheat (Triticum aestivum L.) crop-fallow rotation. This study was conducted on a Duroc sit loam (fine silty, mixed, mesic, Pachic Haplustolls) in western Nebraska from May 1982 to September 1983. Nonsymbiotic N2 fixation was estimated using the C2H2 reduction assay on intact soil cores from plow, stuble mulch,no-till, and native sod management pratices. Nitrogen fixation potentials of no-till soils were twofold greater than those of plowed ans were positively corrlated with higher soil-water contents for reduced tillage. The amount of N2 fixed during one cycle of the wheat-fallow rotation, however, as calculated from the C2H2 reduction assay, was 0.33 kg N ha-1yr-1, which falls far short of the positive budget of 26 kg N ha-1yr found in the no-till soil. Lower incubation temperatures, which simulated soil temperatures of tillage systems in the field, resulted in an even lower fixation than at 25oC.
650 $asoil
650 $aPlanta
650 $aSolo
653 $aFixacao
653 $aFixation
653 $aPlant
653 $aTriticum aestivum L
700 1 $aDORAN, J. W.
700 1 $aPETERSON, G. A.
773 $tSoil Science Society America Journal$gv.51, p.356-361, 1987.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| Registros recuperados : 7 | |
| 5. |  | ROCHA, T. L.; PETERSON, G.; CRIMMINS, K.; BOYD, A.; SAWYER, L.; FOTHERGILL-GILMORE, L. A. Expression and secretion of recombinant ovine B-lactoglobulin in Saccharomyces cerevisiae and Kluyveromyces lactis. Biochemical Journal, London, v.313, n.3, p.927-932, 1996. p.927-932| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 6. | | CRUZ, C. C.; BOCKUS, W. W.; STACK, J. P.; VALENT, B.; MACIEL, J. L. N.; PETERSON, G. L. A standardized inoculation protocol to test wheat cultivars for reaction to head blast caused by Magnaporthe oryzae (Triticum pathotype). Plant Health Progress, St. Paul, v. 17, n. 3, p. 186-187, 2016.| Tipo: Nota Técnica/Nota Científica |
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| 7. | | FARMAN, M.; PETERSON, G.; CHEN, L.; STARNES, J.; VALENT, B.; BACHI, P.; MURDOCK, L.; HERSHMAN, D.; PEDLEY, K.; FERNANDES, J. M. C.; BAVARESCO, J. The Lolium pathotype of Magnaporthe oryzae recovered from a single blasted wheat plant in the United States. Plant Disease, St. Paul, v. 101, n. 5, p. 684-692, May 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Trigo. |
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| Registros recuperados : 7 | |
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