Measurement of Microbial Biomass and Activity in Soil

Solaiman, Zakaria

doi:10.1007/978-3-540-70865-0_13

Cited by 19 publications

(11 citation statements)

References 19 publications

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“…Total organic carbon and nitrogen were determined using a Shimadzu (Kyoto, Japan) TOC‐TN analyser. Microbial biomass carbon (C mic ) and nitrogen (N mic ) were calculated from the difference between fumigated and unfumigated samples using a conversion factor ( k EC) of 0.45 (Solaiman, ). Carbon extracted from unfumigated samples was used as a measure of extractable extracellular carbon (C ext ) (Hofman et al, ).…”

Section: Methodsmentioning

confidence: 99%

Linking diagnostic features to soil microbial biomass and respiration in agricultural grassland soil: a large‐scale study in Ireland

Richter

hUallacháin

Doyle

et al. 2018

European J Soil Science

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The functional potential of soil ecosystems can be predicted from the activity and abundance of the microbial community in relation to key soil properties. When describing microbial community dynamics, soil physicochemical properties have traditionally been used. The extent of correlations between properties, however, differs between studies, especially across larger spatial scales. In this research we analysed soil microbial biomass and substrate‐induced respiration of 156 samples from Irish grasslands. In addition to the standard physicochemical, soil type and land management variables, soil diagnostic properties were included to identify if these important soil–landscape genesis classes affected microbial biomass and respiration dynamics in Irish soil. Apart from physicochemical properties, soil drainage class was identified as having an important effect on microbial properties. In particular, biomass‐specific basal (qCO2) and substrate‐induced respiration (SIR:CFE) were explained best by the soil drainage. Poorly drained soil had smaller values of these respiration measures than well‐drained soil. We concluded that this resulted from different groups within the microbial community that could use readily available carbon sources, which suggests a change in microbial community dynamics associated with soil texture and periods of water stress. Overall, our results indicate that soil quality assessments should include both physicochemical properties and diagnostic classes, to provide a better understanding of the behaviour of soil microbial communities. Highlights Assessing the effect of soil diagnostic features and properties on microbial biomass and respiration A soil biological survey from 156 grassland sites in Ireland Soil drainage class has an important effect on microbial properties Soil quality assessments should include both physicochemical properties and diagnostic classes

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Section: Methodsmentioning

confidence: 99%

Linking diagnostic features to soil microbial biomass and respiration in agricultural grassland soil: a large‐scale study in Ireland

Richter

hUallacháin

Doyle

et al. 2018

European J Soil Science

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“…Net N mineralization was measured by the difference between initial and final contents of NO 3 − and NH 4 + in the soils. The fumigation‐extraction method was used to measure microbial C and N contents (Vance et al, 1987; Solaiman, 2007) for the fresh soil samples. The extraction factors used were 0.45 for C and 0.54 for N.…”

Section: Methodsmentioning

confidence: 99%

Effects of Biochar Addition on Greenhouse Gas Emissions and Microbial Responses in a Short-Term Laboratory Experiment

2012

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Biochar application to soil has drawn much attention as a strategy to sequester atmospheric carbon in soil ecosystems. The applicability of this strategy as a climate change mitigation option is limited by our understanding of the mechanisms responsible for the observed changes in greenhouse gas emissions from soils, microbial responses, and soil fertility changes. We conducted an 8-wk laboratory incubation using soils from PASTURE (silt loam) and RICE PADDY (silt loam) sites with and without two types of biochar (biochar from swine manure [CHAR-M] and from barley stover [CHAR-B]). Responses to addition of the different biochars varied with the soil source. Addition of CHAR-B did not change CO and CH evolution from the PASTURE or the RICE PADDY soils, but there was a decrease in NO emissions from the PASTURE soil. The effects of CHAR-M addition on greenhouse gas emissions were different for the soils. The most substantial change was an increase in NO emissions from the RICE PADDY soil. This result was attributed to a combination of abundant denitrifiers in this soil and increased net nitrogen mineralization. Soil phosphatase and N-acetylglucosaminidase activity in the CHAR-B-treated soils was enhanced compared with the controls for both soils. Fungal biomass was higher in the CHAR-B-treated RICE PADDY soil. From our results, we suggest CHAR-B to be an appropriate amendment for the PASTURE and RICE PADDY soils because it provides increased nitrogen availability and microbial activity with no net increase in greenhouse gas emissions. Application of CHAR-M to RICE PADDY soils could result in excess nitrogen availability, which may increase NO emissions and possible NO leaching problems. Thus, this study confirms that the ability of environmentally sound biochar additions to sequester carbon in soils depends on the characteristics of the receiving soil as well as the nature of the biochar.

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“…In this assay, the production of a bright yellow colouration (the FDA product, fluorescein) indicates microbial activity, and the intensity as determine by a spectrophotometer indicates the level of activity. Therefore, following soil sieving as described above, sub-samples were processed according to the protocol outlined in Solaiman (2007). The colour intensity was quantified using a spectrophotometer at a UV absorbance of 490 nm and results were expressed as g fluorescein produced g −1 dry soil.…”

Section: Total Microbial Enzyme Activity Analysis Via Fluorescein Di-mentioning

confidence: 99%

Sinigrin degradation and G. pallida suppression in soil cultivated with brassicas under controlled environmental conditions

Ngala

Woods

Back

2015

Applied Soil Ecology

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Measurement of Microbial Biomass and Activity in Soil

Cited by 19 publications

References 19 publications

Linking diagnostic features to soil microbial biomass and respiration in agricultural grassland soil: a large‐scale study in Ireland

Linking diagnostic features to soil microbial biomass and respiration in agricultural grassland soil: a large‐scale study in Ireland

Effects of Biochar Addition on Greenhouse Gas Emissions and Microbial Responses in a Short-Term Laboratory Experiment

Sinigrin degradation and G. pallida suppression in soil cultivated with brassicas under controlled environmental conditions

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