Seasonal fluctuations of bacterial population and microbial activity in soils cultivated with eucalyptus and pinus
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100015 |
Resumo: | The accumulation and decomposition of litter in soils under forests depend on climatic and biotic conditions. This work evaluated the effect of monthly rainfall and temperature on total bacteria, and on the dehydrogenase and respiration microbial activities. The effects of organic matter, total organic C and soil moisture were also evaluated. Performed from April, 1999 to March, 2000 in an Eucalyptus-cultivated and Pinus-cultivated Oxisol (Typic Haplustox), the study showed that climate and the soil variables affect the total number of bacteria and the microbial activities. The highest air temperatures and rainfall intensities were found during the Summer and, consequently, all the studied variables were maximal during this period. Minimal values varied from Autumn to Winter or, for some parameters, up to Spring. A positive correlation proved the influence of the organic matter, organic C and soil moisture on the total bacteria and on the respiratory and dehydrogenase activities. Litter content was also higher in the Summer as compared to the Winter, but it correlated only with the total bacteria (r = 0.52***). However, the correlation between the litter content and organic matter (r = 0.64***) and soil moisture (r = 0.49**) suggest that the soil organic matter may have influenced microbial activity. All variables found in the Eucalyptus soil were higher than that of Pinus soil, probably favored by the best soil fertility and higher pH value. |
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Seasonal fluctuations of bacterial population and microbial activity in soils cultivated with eucalyptus and pinusMPNdehydrogenasemicrobial respirationlittertemperatureThe accumulation and decomposition of litter in soils under forests depend on climatic and biotic conditions. This work evaluated the effect of monthly rainfall and temperature on total bacteria, and on the dehydrogenase and respiration microbial activities. The effects of organic matter, total organic C and soil moisture were also evaluated. Performed from April, 1999 to March, 2000 in an Eucalyptus-cultivated and Pinus-cultivated Oxisol (Typic Haplustox), the study showed that climate and the soil variables affect the total number of bacteria and the microbial activities. The highest air temperatures and rainfall intensities were found during the Summer and, consequently, all the studied variables were maximal during this period. Minimal values varied from Autumn to Winter or, for some parameters, up to Spring. A positive correlation proved the influence of the organic matter, organic C and soil moisture on the total bacteria and on the respiratory and dehydrogenase activities. Litter content was also higher in the Summer as compared to the Winter, but it correlated only with the total bacteria (r = 0.52***). However, the correlation between the litter content and organic matter (r = 0.64***) and soil moisture (r = 0.49**) suggest that the soil organic matter may have influenced microbial activity. All variables found in the Eucalyptus soil were higher than that of Pinus soil, probably favored by the best soil fertility and higher pH value.Escola Superior de Agricultura "Luiz de Queiroz"2004-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100015Scientia Agricola v.61 n.1 2004reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90162004000100015info:eu-repo/semantics/openAccessRigobelo,Everlon CidNahas,Elyeng2004-02-16T00:00:00Zoai:scielo:S0103-90162004000100015Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2004-02-16T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Seasonal fluctuations of bacterial population and microbial activity in soils cultivated with eucalyptus and pinus |
title |
Seasonal fluctuations of bacterial population and microbial activity in soils cultivated with eucalyptus and pinus |
spellingShingle |
Seasonal fluctuations of bacterial population and microbial activity in soils cultivated with eucalyptus and pinus Rigobelo,Everlon Cid MPN dehydrogenase microbial respiration litter temperature |
title_short |
Seasonal fluctuations of bacterial population and microbial activity in soils cultivated with eucalyptus and pinus |
title_full |
Seasonal fluctuations of bacterial population and microbial activity in soils cultivated with eucalyptus and pinus |
title_fullStr |
Seasonal fluctuations of bacterial population and microbial activity in soils cultivated with eucalyptus and pinus |
title_full_unstemmed |
Seasonal fluctuations of bacterial population and microbial activity in soils cultivated with eucalyptus and pinus |
title_sort |
Seasonal fluctuations of bacterial population and microbial activity in soils cultivated with eucalyptus and pinus |
author |
Rigobelo,Everlon Cid |
author_facet |
Rigobelo,Everlon Cid Nahas,Ely |
author_role |
author |
author2 |
Nahas,Ely |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Rigobelo,Everlon Cid Nahas,Ely |
dc.subject.por.fl_str_mv |
MPN dehydrogenase microbial respiration litter temperature |
topic |
MPN dehydrogenase microbial respiration litter temperature |
description |
The accumulation and decomposition of litter in soils under forests depend on climatic and biotic conditions. This work evaluated the effect of monthly rainfall and temperature on total bacteria, and on the dehydrogenase and respiration microbial activities. The effects of organic matter, total organic C and soil moisture were also evaluated. Performed from April, 1999 to March, 2000 in an Eucalyptus-cultivated and Pinus-cultivated Oxisol (Typic Haplustox), the study showed that climate and the soil variables affect the total number of bacteria and the microbial activities. The highest air temperatures and rainfall intensities were found during the Summer and, consequently, all the studied variables were maximal during this period. Minimal values varied from Autumn to Winter or, for some parameters, up to Spring. A positive correlation proved the influence of the organic matter, organic C and soil moisture on the total bacteria and on the respiratory and dehydrogenase activities. Litter content was also higher in the Summer as compared to the Winter, but it correlated only with the total bacteria (r = 0.52***). However, the correlation between the litter content and organic matter (r = 0.64***) and soil moisture (r = 0.49**) suggest that the soil organic matter may have influenced microbial activity. All variables found in the Eucalyptus soil were higher than that of Pinus soil, probably favored by the best soil fertility and higher pH value. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-02-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100015 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100015 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-90162004000100015 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
dc.source.none.fl_str_mv |
Scientia Agricola v.61 n.1 2004 reponame:Scientia Agrícola (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Scientia Agrícola (Online) |
collection |
Scientia Agrícola (Online) |
repository.name.fl_str_mv |
Scientia Agrícola (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
scientia@usp.br||alleoni@usp.br |
_version_ |
1748936459237195776 |