A direct extraction method to estimate soil microbial c: effects of experimental variables and some different calibration procedures

Tate, K. R.; Ross, D. J.; Feltham, C.W.

doi:10.1016/0038-0717(88)90013-2

Cited by 317 publications

(126 citation statements)

References 27 publications

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“…O método da fumigação-extração foi utilizado para estimar o C e o N da biomassa microbiana do solo (CBMS e NBMS, respectivamente) (Tate et al, 1988) e da serapilheira (CBMSE e NBMSE, respectivamente). Pesaram-se 20 g de solo e 2 g de serapilheira (três amostras fumigadas e três não-fumigadas).…”

Section: Methodsunclassified

Alterações na biomassa e na atividade microbiana da serapilheira e do solo, em decorrência da substituição de cobertura florestal nativa por plantações de eucalipto, em diferentes sítios da Região Sudeste do Brasil

Gama-Rodrigues

Barros

Viana³

et al. 2008

Rev. Bras. Ciênc. Solo

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RESUMOO eucalipto é a principal espécie florestal utilizada nos programas de reflorestamento no Brasil. Questiona-se quais as mudanças que essa espécie pode promover no solo. O impacto da substituição de uma cobertura vegetal por outra pode variar com as condições de clima e de solo, e os resultados obtidos numa região podem não ser extrapoláveis numa avaliação supra-regional. A biomassa e a atividade microbiana têm sido sugeridas como indicadores adequados de alterações provocadas por mudanças no uso da terra. Neste trabalho, essas características foram utilizadas para avaliar alterações na serapilheira e no solo em decorrência da substituição de cobertura florestal nativa por plantações de eucalipto em quatro sítios da Região Sudeste brasileira. A quantidade de serapilheira foi maior nas plantações de eucalipto do que nas formações nativas, o que foi explicado pela maior relação C:N na serapilheira do eucalipto. O impacto da conversão da vegetação nativa em eucalipto nos atributos microbiológicos da serapilheira e do solo variou conforme as características específicas analisadas de cada sítio florestal. Diferenças entre os teores de C e de N na biomassa microbiana de eucalipto e vegetação natural foram mais freqüentemente observadas no solo do que na serapilheira. A biomassa microbiana da serapilheira representou uma reserva de C e N maior do que a biomassa microbiana do solo, constituindo-se num (1) Recebido para publicação em fevereiro de 2007 e aprovado em maio de 2008.

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Section: Methodsunclassified

Alterações na biomassa e na atividade microbiana da serapilheira e do solo, em decorrência da substituição de cobertura florestal nativa por plantações de eucalipto, em diferentes sítios da Região Sudeste do Brasil

Gama-Rodrigues

Barros

Viana³

et al. 2008

Rev. Bras. Ciênc. Solo

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“…To ensure possible uniformity in soil moisture regime, soil sampling blocks were selected in riparian zone of the respective lake sites at a distance of 50 to 100 m from the lake bank. Microbial biomass was determined following chloroform fumigation extraction procedure (Tate et al, 1998) and activity was determined in terms of substrate induced respiration (SIR) and metabolic quotient (qCO2). For SIR, 20 g of soil sample (moisture content, 55%) was amended with 120 mg of glucose at the beginning of incubation (Anderson and Domsch, 1978).…”

Section: Atmospheric Depositionmentioning

confidence: 99%

Atmospheric Deposition of Nutrients Shifts Carbon Capture and Storage Trends in Freshwater Tropical Lakes in India

Pandey

2014

Environmental Control in Biology

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An understanding of ongoing changes in biogeochemistry of carbon (C) as influenced by increasing atmospheric deposition (AD) of nutrients is important for integrated water resource management and for exploring options for balancing C sink and fluxes. To determine whether AD-nutrients would increase phytoplankton production and catchment carbon flushing in lakes, we analyzed NO 3 , NH 4 and PO 3 4 in atmospheric deposits, microbial biomass and activity in catchment, nutrient and dissolved organic carbon (DOC) in runoff and, phytoplankton production and sediment-C in six freshwater lakes from 1999 to 2008. Although N: P stoichiometry of AD did not change over time, there was over 1.5 fold increase in AD-NO 3 , NH 4 and PO 3 4 overtime. Microbial biomass and activity in catchments and, DOC and nutrients in runoff increased consistently over time. Lake nutrients, DOC, gross primary productivity, chlorophyll a biomass and sediment-C also showed positive relationship with AD-nutrients. The study indicates that rising input of AD-nutrients steer freshwater lakes towards greater productivity, whereas such inputs in catchment enhance microbial processes and consequently runoff DOC flush and the-coupled effects of these may cause long-term shift in water quality and C balance of these ecosystems.

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“…It has been reported that the plant residue incorporation reduces the C/N ratio of the microbial biomass (Kushwaha et al 2000). The decrease and different C/N ratios occur as a result of changes in microbial population during the decomposition of different incorporated residue (Tate et al 1988). Similarly, Singh et al (1993) conducted an experiment to observe the effect of residue placement on microbial biomass in Inceptisol soils of Varanasi, India; they found that the incorporation of straw reduced the overall C/N ratio of the microbial biomass.…”

Section: Impact Of Organic Amendments and Water Regimes On Soil Micromentioning

confidence: 99%

Microcalorimetric evaluation of soil microbiological properties under plant residues and dogmatic water gradients in Red soil

Hassan

Chen

Huang

et al. 2013

Soil Science and Plant Nutrition

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A study of 6 months duration was carried out to investigate the effect of water regimes and organic amendments on the soil microbial biomass and microbial population under Red soil collected from Hunan Providence, China. The soil microbial biomass and population were measured with traditional methods and results obtained by conventional methods, corroborated with microcalorimetry. The incorporation of rice (Oryza sativa L.) straw (RS) and green manure (GM), especially at high rates, enhanced the soil microbial activities. We observed that the use of GM exhibited more significant stimulating effects on microbial activities than RS. Similarly, water regimes, 25% (W1) and 200% (W2) of water holding capacity, also had significant effects on microbial activities. Comparing the effects of water levels, we noticed that W2 had a significant negative influence on soil microbial biomass and population. To compare the results of conventional methods and to check the sensitivity of microcalorimetry, the thermodynamic parameters, microbial growth rate constant (k), total heat evolution (Q), peak height (P max ) and peak time (t max ) were calculated. Highest P max, k and Q were observed in GM treatments at water regime W1, while highest t max values were recorded in CK (control) and RS treatments at W2. The microcalorimetric parameters, P max, k and Q were positively correlated, whereas t max negatively linked with microbial biomass and population at p < 0.01. Our results suggest that microcalorimetry successfully verified the results obtained from customary methods and microcalorimetric parameters P max, t max, Q and k proved that they are highly sensitive to microbial properties and could be used as indices of microbial community shifts and activities in soil ecosystems.

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A direct extraction method to estimate soil microbial c: effects of experimental variables and some different calibration procedures

Cited by 317 publications

References 27 publications

Alterações na biomassa e na atividade microbiana da serapilheira e do solo, em decorrência da substituição de cobertura florestal nativa por plantações de eucalipto, em diferentes sítios da Região Sudeste do Brasil

Alterações na biomassa e na atividade microbiana da serapilheira e do solo, em decorrência da substituição de cobertura florestal nativa por plantações de eucalipto, em diferentes sítios da Região Sudeste do Brasil

Atmospheric Deposition of Nutrients Shifts Carbon Capture and Storage Trends in Freshwater Tropical Lakes in India

Microcalorimetric evaluation of soil microbiological properties under plant residues and dogmatic water gradients in Red soil

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