Non-instrumental Real-time Soil Respiration Rate and Soil Microbial Biomass Carbon Determinations

Hsieh, Yun-Hwa Peggy; Anderson, George; Miller, Robert O.; Nemours, Djanan

doi:10.1080/00103624.2020.1836205

Cited by 3 publications

(3 citation statements)

References 49 publications

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“…Moreover, the dynamics of the shorter turnover-time (<3 years) pools can be conveniently determined in short-term incubation experiments if so desired. For example, the size of the BIO pool can be conveniently measured in real-time by a rapid method [29].…”

Section: Discussionmentioning

confidence: 99%

The Labile and Resistant Soil Organic Carbon Pools in the North America Great Plains

Hsieh

2023

Environments

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Among the three major global carbon cycle components, the terrestrial one has been the most uncertain because of the complexity of the soil organic carbon (SOC) dynamics. Previous tracer studies, however, have shown that SOC consists of labile and resistant pools. Labile pools turn over in decades, and resistant pools turn over in hundreds or thousands of years. Labile pools are active in carbon and nutrient cycles and responsive to land-use management changes, whereas resistant pools are less so. Very few studies have actually quantified labile and resistant SOC pools because the isotopic tracer methods, such as the paired-plot bulk-carbon (PPBC) method, can only be applied to a few special cases. I found a study of SOC in the North America Great Plains, in which some of the data are suitable for the PPBC method. The results revealed that the turnover times of the labile SOC pools ranged from 17 years to 93 years, and the sizes ranged from 1.2 g kg−1 to 17.6 g kg−1. The turnover times of the resistant pools ranged from 899 years to 5138 years, and the sizes ranged from 5.0 g kg−1 to 12.4 g kg−1. Land management practices changed the sizes of the labile pools but not their turnover times. This study also pointed out a possibility that allows the application of the PPBC method to a set of much broader cases.

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Section: Discussionmentioning

confidence: 99%

The Labile and Resistant Soil Organic Carbon Pools in the North America Great Plains

Hsieh

2023

Environments

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“…Soil microbial biomass carbon has been commonly recognized as an important indicator of soil microbial parameters. It represents the size of the microbial pool, which reflects soil organic matter (SOM) changes such as carbon cycling [ 13 ]. Soil respiration is also closely related to several functions of organisms.…”

Section: Introductionmentioning

confidence: 99%

“…However, there may not be a simple relation between the measurement of enzymatic activity and the microbial functional diversity, hence the complexity of metabolic reactions and interactions of soil microbiota [ 16 ]. Since relationships between soil enzymes and other parameters of soil biological activity are not direct, they need to be analyzed carefully [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Intact Mycelium of Arbuscular Mycorrhizal Fungi on Soil Microbiome Functional Profile in Wheat under Mn Stress

Conceição

Andrade

Brito

2022

Plants

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In the current agronomic context, the adoption of alternative forms of soil management is essential to increase crop yield. Agricultural sustainability requires practices that generate positive impacts and promote an increase in microbiome diversity as a tool to overcome adverse environmental conditions. An important ally is the indigenous arbuscular mycorrhizal fungi (AMF) that can improve plant growth and provide protection against abiotic stress such as metal toxicity. In a greenhouse experiment, this work studied the effect of wheat growth on several parameters of biological activity and functional microbiome in relation to wheat antecedent plant mycotrophy and soil disturbance under Mn stress. When the wheat was planted after highly mycotrophic plants and the soil was not previously disturbed, the results showed a 60% increase in wheat arbuscular colonization and a 2.5-fold increase in dry weight along with higher values of photosynthetic parameters and dehydrogenase activity. Conversely, soil disturbance before wheat planting increased the β-glucosidase activity and the count of manganese oxidizers, irrespectively of antecedent plant, and decreased drastically the wheat dry weight, the AMF colonization and the chlorophyll content compared to the undisturbed treatment. These findings suggest that not only the wheat growth but also the soil functional microbiome associated is affected by the antecedent type of plant and previous soil disturbance imposed. In addition, the improvement in wheat dry weight despite Mn toxicity may rely on shifts in biological activity associated to a well-established and intact ERM early developed in the soil.

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How is microbial biomass carbon affected by oil-pollution in soils? An alternative approach to its measure

Moradi

Sarikhani

Aleagha

et al. 2023

Preprint

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Oil pollution is one of the most critical environmental pollutions affecting soil's biological, physical, and chemical properties. There are several methods to measure MBC, the most important of which are chloroform fumigation extraction (CFE), chloroform fumigation incubation (CFI), and experimental methods based on substrate-induced respiration (SIR). Due to the presence of high oil content in the oil-polluted soil samples and high content of organic carbon (OC), the application of the CFE method has some limitations because tracking minor changes of MBC in a huge background of OC is not possible. The effect of three levels of oil pollution (L: low, M: moderate, and H: high) on MBC measured by CFI (MBC-CFI) and SIR (MBC-SIR) was investigated through an incubation experiment. Hence, 120 oil-contaminated soil samples were gathered from four selected locations of polluted sites in Naft-Shahr, Kermanshah, Iran. Four experimental formulas including MBC = 16.18×SIR + 5.11 (Eq. 1), MBC = SIR×30 (Eq. 2), MBC = SIR×25.3 (Eq. 3), and MBC = 40.04×SIR + 0.37 (Eq. 4) to estimate the amount of MBC-SIR were used. The results showed that there is a positive and significant correlation between two methods used in this study (r = 0.91, P < 0.01). In both methods, the MBC obtained in H soils was higher than in L and M soils. The values of MBC-CFI data ranged from 264.685 in L soils to 419.459 mgC 100g− 1 in H soils. Among the four used formulas in this study, the lowest amount of RMSE and SI was obtained for Eq. 4. The MBC-SIR measured by Eq. 4 ranged from 290.224 mgC 100g− 1 in L soils to 478.107 mgC 100g− 1 in H soils. According to this study's results, experimental methods based on SIR, especially Eq. 4 can also be used to estimate the amount of MBC in oil-contaminated soils. Moreover, in this study, multiple linear regression analysis and principal components analysis (PCA) was performed on data to get insight into the relation of bio-physical-chemical properties of soil, especially with MBC.

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Non-instrumental Real-time Soil Respiration Rate and Soil Microbial Biomass Carbon Determinations

Cited by 3 publications

References 49 publications

The Labile and Resistant Soil Organic Carbon Pools in the North America Great Plains

The Labile and Resistant Soil Organic Carbon Pools in the North America Great Plains

Influence of Intact Mycelium of Arbuscular Mycorrhizal Fungi on Soil Microbiome Functional Profile in Wheat under Mn Stress

How is microbial biomass carbon affected by oil-pollution in soils? An alternative approach to its measure

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