Soil heterotrophic respiration assessment using minimally disturbed soil microcosm cores

Comeau, Louis‐Pierre; Lai, Derrick Y.F.; Cui, Jane Jinglan; Hartill, Jodie

doi:10.1016/j.mex.2018.07.014

Cited by 16 publications

(18 citation statements)

References 14 publications

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“…Gaseous N 2 O-N and CO 2 -C fluxes were calculated on soil mass basis by considering the linear increase in headspace concentration over the incubation period according to [71]. The ideal gas law was used to convert ppm of N 2 O and CO 2 in ppm, to N and C mass.…”

Section: Calculations and Statistical Analysismentioning

confidence: 99%

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Gross Ammonification and Nitrification Rates in Soil Amended with Natural and NH4-Enriched Chabazite Zeolite and Nitrification Inhibitor DMPP

et al. 2021

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Using zeolite-rich tuffs for improving soil properties and crop N-use efficiency is becoming popular. However, the mechanistic understanding of their influence on soil N-processes is still poor. This paper aims to shed new light on how natural and NH4+-enriched chabazite zeolites alter short-term N-ammonification and nitrification rates with and without the use of nitrification inhibitor (DMPP). We employed the 15N pool dilution technique to determine short-term gross rates of ammonification and nitrification in a silty-clay soil amended with two typologies of chabazite-rich tuff: (1) at natural state and (2) enriched with NH4+-N from an animal slurry. Archaeal and bacterial amoA, nirS and nosZ genes, N2O-N and CO2-C emissions were also evaluated. The results showed modest short-term effects of chabazite at natural state only on nitrate production rates, which was slightly delayed compared to the unamended soil. On the other hand, the addition of NH4+-enriched chabazite stimulated NH4+-N production, N2O-N emissions, but reduced NO3−-N production and abundance of nirS-nosZ genes. DMPP efficiency in reducing nitrification rates was dependent on N addition but not affected by the two typologies of zeolites tested. The outcomes of this study indicated the good compatibility of both natural and NH4+-enriched chabazite zeolite with DMPP. In particular, the application of NH4+-enriched zeolites with DMPP is recommended to mitigate short-term N losses.

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Section: Calculations and Statistical Analysismentioning

confidence: 99%

“…Cf = (P*Mwc*1000)/(R*T) (5) where Cf is the conversion factor (ppm to µg m 3 ); P is the air pressure (in kPa); Mwc is the molar mass of N or C; R is the gas constant (8.314); T is the incubation air temperature (K) [71].…”

Section: Calculations and Statistical Analysismentioning

confidence: 99%

Gross Ammonification and Nitrification Rates in Soil Amended with Natural and NH4-Enriched Chabazite Zeolite and Nitrification Inhibitor DMPP

et al. 2021

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“…Baseline biochemical and physicochemical properties were then determined. The remainder of each composite sample was stored in separate containers and left to settle in the dark for 1 week at 15 • C (Zeng, 2017;Comeau et al, 2018;Randle-Boggis et al, 2018).…”

Section: Soil Samplingmentioning

confidence: 99%

An Assessment of Climate Induced Increase in Soil Water Availability for Soil Bacterial Communities Exposed to Long-Term Differential Phosphorus Fertilization

et al. 2020

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The fate of future food productivity depends primarily upon the health of soil used for cultivation. For Atlantic Europe, increased precipitation is predicted during both winter and summer months. Interactions between climate change and the fertilization of land used for agriculture are therefore vital to understand. This is particularly relevant for inorganic phosphorus (P) fertilization, which already suffers from resource and sustainability issues. The soil microbiota are a key indicator of soil health and their functioning is critical to plant productivity, playing an important role in nutrient acquisition, particularly when plant available nutrients are limited. A multifactorial, mesocosm study was established to assess the effects of increased soil water availability and inorganic P fertilization, on spring wheat biomass, soil enzymatic activity (dehydrogenase and acid phosphomonoesterase) and soil bacterial community assemblages. Our results highlight the significance of the spring wheat rhizosphere in shaping soil bacterial community assemblages and specific taxa under a moderate soil water content (60%), which was diminished under a higher level of soil water availability (80%). In addition, an interaction between soil water availability and plant presence overrode a long-term bacterial sensitivity to inorganic P fertilization. Together this may have implications for developing sustainable P mobilization through the use of the soil microbiota in future. Spring wheat biomass grown under the higher soil water regime (80%) was reduced compared to the constant water regime (60%) and a reduction in yield could be exacerbated in the future when grown in cultivated soil that have been fertilized with inorganic P. The potential feedback mechanisms for this need now need exploration to understand how future management of crop productivity may be impacted.

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“…If possible, undisturbed soil cores are sampled with stainless steel volumetric rings (bulk density rings), following the method proposed by Comeau et al. [9] . Many deep Bh, however, are too hard for a non-disturbing sampling.…”

Section: Field Samplingmentioning

confidence: 99%

“…Drying the samples or bringing them to field capacity will therefore be a radical ecological change for the existing microbial communities, which could alter the respiration rates. Recent studies have shown that ex-situ measurement of soil respiration with pre-dried and disturbed samples can give questionable results [9] .…”

Section: Introductionmentioning

confidence: 99%

Soil sample conservation from field to lab for heterotrophic respiration assessment

et al. 2020

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We evaluated (1) whether the sample transport time could lead to a significant loss of carbon through microbial respiration and to a change of measured respiration rates, which can be a problem in areas difficult to access, with a long travel time from field to laboratory; (2) whether the method used to quantify heterotrophic respiration for agricultural soils is adequate for horizons that remain always water-saturated or close to saturation. Surface horizons and deep Bh of Amazonian podzols were sampled and kept under refrigeration to maintain moisture of sampling time. Incubations of aliquot of the same sample were initiated on the sampling day and 3, 6, 9 and 12 days after sampling. Other aliquots were conducted on a tension table to given water potential (60 cm H2O ) prior to incubation. Soil samples, whether disturbed or not, should not be dried but kept at sampling moisture in semi-open plastic bags under refrigeration at 4 °C, respiration monitoring must be conducted without prior water potential adjustment. In such conditions,12 days between sampling and beginning of measurement did not affected respiration results. The method used for agricultural soils gave different results and does not make sense for soils under perudic moisture regime.

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Soil heterotrophic respiration assessment using minimally disturbed soil microcosm cores

Abstract: Graphical abstract

Cited by 16 publications

References 14 publications

Gross Ammonification and Nitrification Rates in Soil Amended with Natural and NH4-Enriched Chabazite Zeolite and Nitrification Inhibitor DMPP

Gross Ammonification and Nitrification Rates in Soil Amended with Natural and NH4-Enriched Chabazite Zeolite and Nitrification Inhibitor DMPP

An Assessment of Climate Induced Increase in Soil Water Availability for Soil Bacterial Communities Exposed to Long-Term Differential Phosphorus Fertilization

Soil sample conservation from field to lab for heterotrophic respiration assessment

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