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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
01/10/1997 |
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Data da última atualização: |
05/04/2017 |
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Autoria: |
YONKER, C. M.; SCHIMEL, D. S.; PAROUSSIS, E.; HEIL, R. D. |
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Título: |
Patterns of organic carbon accumulation in a semiarid shortgrass steppe, Colorado. |
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Ano de publicação: |
1988 |
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Fonte/Imprenta: |
Soil Science Society of America Journal, v.52, n.2, p.478-483, 1988. |
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Idioma: |
Inglês |
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Conteúdo: |
Organic C accumulation was measured along an 8-km transect at a site in the semiarid shortgrass steppe of northeastern Colorado. Specific objectives of the study were to (i) measure the quantity and distribution of organic C across toposequences, (ii) test the hypothesis that a disproportionate amount of soil organic C residues in the lowlands (as defined herein), and (iii) assess the role of geomorphic history as determinant of compensatory rates of biochemical organic C transformations. Resulkts of the study showed the surface (A) horizon organic C concentration did not vary systematically among slope postiions of a give toposequences. Similarly, the mass of organic C within the surface meter of soil often did not increase with decreasing elevation across a toposequence. Mass of organic C was found to range from 2.5 kg m-3 on terrace escarpments to 10.7 kg m-3 on sandy uplands. The mass of organic C, as calculated to the BCk horizon, was highest in the lowlands. The mass of buried organic C, as calculated uniformly for a 50-cm thickness of material, represents 17% of the total organic C estimate for the site. In spite of buried soils, lowlands did not contain a disproportionate amount of total landscape organic C. |
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Palavras-Chave: |
Biogeoquimica; Geomorphic history; Toposequence. |
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Thesagro: |
Matéria Orgânica; Solo. |
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Thesaurus Nal: |
biogeochemistry; buried soils. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01909naa a2200241 a 4500
001 1791836
005 2017-04-05
008 1988 bl --- 0-- u #d
100 1 $aYONKER, C. M.
245 $aPatterns of organic carbon accumulation in a semiarid shortgrass steppe, Colorado.
260 $c1988
520 $aOrganic C accumulation was measured along an 8-km transect at a site in the semiarid shortgrass steppe of northeastern Colorado. Specific objectives of the study were to (i) measure the quantity and distribution of organic C across toposequences, (ii) test the hypothesis that a disproportionate amount of soil organic C residues in the lowlands (as defined herein), and (iii) assess the role of geomorphic history as determinant of compensatory rates of biochemical organic C transformations. Resulkts of the study showed the surface (A) horizon organic C concentration did not vary systematically among slope postiions of a give toposequences. Similarly, the mass of organic C within the surface meter of soil often did not increase with decreasing elevation across a toposequence. Mass of organic C was found to range from 2.5 kg m-3 on terrace escarpments to 10.7 kg m-3 on sandy uplands. The mass of organic C, as calculated to the BCk horizon, was highest in the lowlands. The mass of buried organic C, as calculated uniformly for a 50-cm thickness of material, represents 17% of the total organic C estimate for the site. In spite of buried soils, lowlands did not contain a disproportionate amount of total landscape organic C.
650 $abiogeochemistry
650 $aburied soils
650 $aMatéria Orgânica
650 $aSolo
653 $aBiogeoquimica
653 $aGeomorphic history
653 $aToposequence
700 1 $aSCHIMEL, D. S.
700 1 $aPAROUSSIS, E.
700 1 $aHEIL, R. D.
773 $tSoil Science Society of America Journal$gv.52, n.2, p.478-483, 1988.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| 1. |  | LIMA, B. L. de C.; SILVA, Ê. F. de F. e; ZONTA, J. H.; CORDÃO TERCEIRO NETO, C. P.; LACERDA, C. F. de; FERREIRA, J. F. da S.; CRUZ, F. J. R. Irrigation with wastewater and K fertilization ensure the yield and quality of coloured cotton in a semiarid climate. Agronomy, v. 11, 2370, p. 1-16, 2021. 16 p.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
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