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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
24/07/2001 |
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Data da última atualização: |
24/07/2001 |
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Autoria: |
NDIAYE, E. L.; SANDENO, J. M.; MCGRATH, D.; DICK, R. P. |
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Título: |
Integrative biological indicators for detecting change in soil quality. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
American Journal of Alternative Agriculture, Greenbelt, v. 15, n. 1, p. 26-36, 2000. |
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Idioma: |
Inglês |
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Conteúdo: |
To promote agricultural sustainability, there is a growing interest in developing soil quality indicators that can be used as early indicators of changes in management practices by growers agricultural professionals, and researchers. A study was conducted on four commercial growers fields and two research stations in western Oregon with that had been started from 1 to 7 years prior to initiating the investigation. The primary comparison at each site was a winter cover crop and winter fallow in rotation with summer vegetable crops. The effects of these treatments on microbial biomass carbon (MBc), mineralizable N, soil enzyme activity (arylsulfatase and B-glucosidase), and cotton strip decomposition were analyzed to monitor changes in soil quality over a 2-year period. The cotton strip method was tested because of its simplicity (buried in soil for short periods and then assessed for tensile strength or weight loss) and potential as a soil biological indicator. Results showed that cover cropping significantly affected MBc and soil enzyme activity. Mineralizable N and CO2 respiration (laboratory incubation) did not respond to winter cover crop treatment. Cotton strip decomposition was relatively ensensitive to field treatments. Because MBc and B-glucosidase activity responded quickly to field management treatment and were less variable than the other measurements, they showed the most potential as soil quality indicators. Total C (organic matter index) and extractable nutrients were not significantly affected by cover cropping (even after 7 years), indicanting selected biological properties are superior to these chemical properties for detecting effects of soil management. MenosTo promote agricultural sustainability, there is a growing interest in developing soil quality indicators that can be used as early indicators of changes in management practices by growers agricultural professionals, and researchers. A study was conducted on four commercial growers fields and two research stations in western Oregon with that had been started from 1 to 7 years prior to initiating the investigation. The primary comparison at each site was a winter cover crop and winter fallow in rotation with summer vegetable crops. The effects of these treatments on microbial biomass carbon (MBc), mineralizable N, soil enzyme activity (arylsulfatase and B-glucosidase), and cotton strip decomposition were analyzed to monitor changes in soil quality over a 2-year period. The cotton strip method was tested because of its simplicity (buried in soil for short periods and then assessed for tensile strength or weight loss) and potential as a soil biological indicator. Results showed that cover cropping significantly affected MBc and soil enzyme activity. Mineralizable N and CO2 respiration (laboratory incubation) did not respond to winter cover crop treatment. Cotton strip decomposition was relatively ensensitive to field treatments. Because MBc and B-glucosidase activity responded quickly to field management treatment and were less variable than the other measurements, they showed the most potential as soil quality indicators. Total C (organic matter index) and extractable nutrien... Mostrar Tudo |
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Palavras-Chave: |
Atividade Engimica; Biomassa microbiana; N; Quality. |
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Thesagro: |
Cobertura do Solo; Mineralização; Nitrogênio; Qualidade; Solo. |
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Thesaurus Nal: |
cover crops; enzyme activity; microbial biomass; mineralization; nitrogen; soil. |
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Categoria do assunto: |
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Marc: |
LEADER 02592naa a2200337 a 4500
001 1621223
005 2001-07-24
008 2000 bl --- 0-- u #d
100 1 $aNDIAYE, E. L.
245 $aIntegrative biological indicators for detecting change in soil quality.
260 $c2000
520 $aTo promote agricultural sustainability, there is a growing interest in developing soil quality indicators that can be used as early indicators of changes in management practices by growers agricultural professionals, and researchers. A study was conducted on four commercial growers fields and two research stations in western Oregon with that had been started from 1 to 7 years prior to initiating the investigation. The primary comparison at each site was a winter cover crop and winter fallow in rotation with summer vegetable crops. The effects of these treatments on microbial biomass carbon (MBc), mineralizable N, soil enzyme activity (arylsulfatase and B-glucosidase), and cotton strip decomposition were analyzed to monitor changes in soil quality over a 2-year period. The cotton strip method was tested because of its simplicity (buried in soil for short periods and then assessed for tensile strength or weight loss) and potential as a soil biological indicator. Results showed that cover cropping significantly affected MBc and soil enzyme activity. Mineralizable N and CO2 respiration (laboratory incubation) did not respond to winter cover crop treatment. Cotton strip decomposition was relatively ensensitive to field treatments. Because MBc and B-glucosidase activity responded quickly to field management treatment and were less variable than the other measurements, they showed the most potential as soil quality indicators. Total C (organic matter index) and extractable nutrients were not significantly affected by cover cropping (even after 7 years), indicanting selected biological properties are superior to these chemical properties for detecting effects of soil management.
650 $acover crops
650 $aenzyme activity
650 $amicrobial biomass
650 $amineralization
650 $anitrogen
650 $asoil
650 $aCobertura do Solo
650 $aMineralização
650 $aNitrogênio
650 $aQualidade
650 $aSolo
653 $aAtividade Engimica
653 $aBiomassa microbiana
653 $aN
653 $aQuality
700 1 $aSANDENO, J. M.
700 1 $aMCGRATH, D.
700 1 $aDICK, R. P.
773 $tAmerican Journal of Alternative Agriculture, Greenbelt$gv. 15, n. 1, p. 26-36, 2000.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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| Registros recuperados : 6 | |
| 6. |  | BALOTA, E. L.; YADA, I. F. U.; AMARAL, H. F.; NAKATANI, A. S.; HUNGRIA, M.; DICK, R. P.; COYNE, M. S. Soil quality in relation to forest conversion to perennial or annual cropping in southern Brasil. Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 39, n. 4, p. 1003-1014, Jul./Aug. 2015.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Soja. |
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| Registros recuperados : 6 | |
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