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Registro Completo |
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Biblioteca(s): |
Embrapa Tabuleiros Costeiros. |
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Data corrente: |
25/06/1996 |
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Data da última atualização: |
17/04/2012 |
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Autoria: |
HELDWEIN, A. B.; STRECK, N. A.; BURIOL, G. A.; SCHNEIDER, F. M.; ESTEFANEL, V.; DALMAGO, G. A. |
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Título: |
Efeito da cobertura de estufa plástica sobre a temperatura mínima do ar. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
IN: CONGRESSO BRASILEIRO DE AGROMETEOROLOGIA, 9. Campina Grande, PB, 1995. Anais... Campina Grande: SBA, 1995. p. 304-306 |
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Idioma: |
Português |
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Conteúdo: |
Foram construídas quatro estufas de 10m x 24m, do tipo "Arco-Pampeana" com o objetivo de avaliar o efeito das coberturas e laterais de polietileno transparente de baixa densidade (PEBD), PEBD + carga mineral, acetato de vinil etileno (EVA) e EVA + carga mineral sobre a temperatura mínima do ar. Os resultados evidenciam que, em média, a temperatura mínima do ar medida a 5cm do solo foi similar nos quatro tipos de cobertura. Já na temperatura mínima medida a 1,5m , houve ganho de quase 2C na cobertura com EVA, mas ainda insuficiente para cultivo de olericolas de verão no inverno. |
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Palavras-Chave: |
Cobertura. |
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Thesagro: |
Ar; Estufa Plástica; Temperatura. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01272naa a2200229 a 4500
001 1364091
005 2012-04-17
008 1995 bl uuuu u00u1 u #d
100 1 $aHELDWEIN, A. B.
245 $aEfeito da cobertura de estufa plástica sobre a temperatura mínima do ar.
260 $c1995
520 $aForam construídas quatro estufas de 10m x 24m, do tipo "Arco-Pampeana" com o objetivo de avaliar o efeito das coberturas e laterais de polietileno transparente de baixa densidade (PEBD), PEBD + carga mineral, acetato de vinil etileno (EVA) e EVA + carga mineral sobre a temperatura mínima do ar. Os resultados evidenciam que, em média, a temperatura mínima do ar medida a 5cm do solo foi similar nos quatro tipos de cobertura. Já na temperatura mínima medida a 1,5m , houve ganho de quase 2C na cobertura com EVA, mas ainda insuficiente para cultivo de olericolas de verão no inverno.
650 $aAr
650 $aEstufa Plástica
650 $aTemperatura
653 $aCobertura
700 1 $aSTRECK, N. A.
700 1 $aBURIOL, G. A.
700 1 $aSCHNEIDER, F. M.
700 1 $aESTEFANEL, V.
700 1 $aDALMAGO, G. A.
773 $tIN: CONGRESSO BRASILEIRO DE AGROMETEOROLOGIA, 9. Campina Grande, PB, 1995. Anais... Campina Grande: SBA, 1995. p. 304-306
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Embrapa Tabuleiros Costeiros (CPATC) |
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Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
05/05/2011 |
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Data da última atualização: |
03/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
BIRK, J. J.; TEIXEIRA, W. G.; NEVES, E. G.; GLASER, B. |
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Afiliação: |
Jago Jonathan Birk, University of Bayreuth; WENCESLAU GERALDES TEIXEIRA, CNPS; Eduardo Góes Neves, Universidade de São Paulo; Bruno Glaser, University of Bayreuth. |
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Título: |
Faeces deposition on Amazonian Anthrosols as assessed from 5b-stanols. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Journal of Archaeological Science, v. 38, n. 6, p. 1209-1220, Jul. 2011. |
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DOI: |
https://doi.org/10.1016/j.jas.2010.12.015 |
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Idioma: |
Inglês |
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Conteúdo: |
In the Amazon Basin, within a landscape of infertile soils, fertile Anthrosols of pre-Columbian origin occur (Amazonian Dark Earths or terra preta de Índio). These soils are characterized by high amounts of charred organic matter (black carbon, biochar) and high nutrient stocks. Frequently, they were considered as sign for intensive landscape domestication by way of sedentary agriculture and as sign for large settlements in pre-Columbian Amazonia. Beyond the archaeological interest in Amazonian Dark Earths, they increasingly receive attention because it is assumed that they could serve as a model for sustainable agriculture in the humid tropics (terra preta nova). Both questions lack information about the pre-Columbian practices which were responsible for the genesis of Amazonian Dark Earths. It has often been hypothesized that deposition of faeces could have contributed to the high nutrient stocks in these soils, but no study has focussed on this question yet. We analyzed the biomarkers for faeces 5b-stanols as well as their precursors and their 5b-isomers in Amazonian Dark Earths and reference soils to investigate the input of faeces into Amazonian Dark Earths. Using Amazonian Dark Earths as example, we discuss the application of threshold values for specific stanols to evaluate faeces deposition in archaeological soils and demonstrate an alternative approach which is based on a comparison of the concentration patterns of 5b-stanols with the concentration patterns of their precursors and their 5b-isomers as well as with local backgrounds. The concentration patterns of sterols show that faeces were deposited on Amazonian Dark Earths. MenosIn the Amazon Basin, within a landscape of infertile soils, fertile Anthrosols of pre-Columbian origin occur (Amazonian Dark Earths or terra preta de Índio). These soils are characterized by high amounts of charred organic matter (black carbon, biochar) and high nutrient stocks. Frequently, they were considered as sign for intensive landscape domestication by way of sedentary agriculture and as sign for large settlements in pre-Columbian Amazonia. Beyond the archaeological interest in Amazonian Dark Earths, they increasingly receive attention because it is assumed that they could serve as a model for sustainable agriculture in the humid tropics (terra preta nova). Both questions lack information about the pre-Columbian practices which were responsible for the genesis of Amazonian Dark Earths. It has often been hypothesized that deposition of faeces could have contributed to the high nutrient stocks in these soils, but no study has focussed on this question yet. We analyzed the biomarkers for faeces 5b-stanols as well as their precursors and their 5b-isomers in Amazonian Dark Earths and reference soils to investigate the input of faeces into Amazonian Dark Earths. Using Amazonian Dark Earths as example, we discuss the application of threshold values for specific stanols to evaluate faeces deposition in archaeological soils and demonstrate an alternative approach which is based on a comparison of the concentration patterns of 5b-stanols with the concentration patterns of their... Mostrar Tudo |
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Palavras-Chave: |
Amazonian Dark Earths; Landscape domestication. |
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Thesaurus NAL: |
Amazonia; Anthrosols; biomarkers; terra preta. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02386naa a2200241 a 4500
001 1887745
005 2021-11-03
008 2011 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.jas.2010.12.015$2DOI
100 1 $aBIRK, J. J.
245 $aFaeces deposition on Amazonian Anthrosols as assessed from 5b-stanols.$h[electronic resource]
260 $c2011
520 $aIn the Amazon Basin, within a landscape of infertile soils, fertile Anthrosols of pre-Columbian origin occur (Amazonian Dark Earths or terra preta de Índio). These soils are characterized by high amounts of charred organic matter (black carbon, biochar) and high nutrient stocks. Frequently, they were considered as sign for intensive landscape domestication by way of sedentary agriculture and as sign for large settlements in pre-Columbian Amazonia. Beyond the archaeological interest in Amazonian Dark Earths, they increasingly receive attention because it is assumed that they could serve as a model for sustainable agriculture in the humid tropics (terra preta nova). Both questions lack information about the pre-Columbian practices which were responsible for the genesis of Amazonian Dark Earths. It has often been hypothesized that deposition of faeces could have contributed to the high nutrient stocks in these soils, but no study has focussed on this question yet. We analyzed the biomarkers for faeces 5b-stanols as well as their precursors and their 5b-isomers in Amazonian Dark Earths and reference soils to investigate the input of faeces into Amazonian Dark Earths. Using Amazonian Dark Earths as example, we discuss the application of threshold values for specific stanols to evaluate faeces deposition in archaeological soils and demonstrate an alternative approach which is based on a comparison of the concentration patterns of 5b-stanols with the concentration patterns of their precursors and their 5b-isomers as well as with local backgrounds. The concentration patterns of sterols show that faeces were deposited on Amazonian Dark Earths.
650 $aAmazonia
650 $aAnthrosols
650 $abiomarkers
650 $aterra preta
653 $aAmazonian Dark Earths
653 $aLandscape domestication
700 1 $aTEIXEIRA, W. G.
700 1 $aNEVES, E. G.
700 1 $aGLASER, B.
773 $tJournal of Archaeological Science$gv. 38, n. 6, p. 1209-1220, Jul. 2011.
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