Estimation of microbial activities

doi:10.1016/b978-012513840-6/50020-3

Cited by 11 publications

(1 citation statement)

References 176 publications

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“…For microbiological analyses, fresh soil samples were collected and transported under controlled temperature. The respiratory activity of the microbial biomass (C-CO 2 ) was evaluated by quantifying the CO 2 released during incubation of the soil (0-0.20-m soil layer) in air-tight jars at 48, 168, 360, and 720 hr (Alef & Nannipieri, 1995). Activities of enzymes β-glucosidase (β-Gc), acid phosphomonoesterase (AcP), and alkaline phosphomonoesterase (AlP) were assessed by quantifying the p-nitrophenol released after incubating subsamples of the fresh soil (0-0.10-m soil layer) according to Tabatabai (1977, 1988).…”

Section: Soil Sampling and Analysesmentioning

confidence: 99%

Practices for rehabilitating bauxite‐mined areas and an integrative approach to monitor soil quality

et al. 2019

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Mining activities cause severe impacts to soil, the restoration of which requires specific management, and proper evaluation and monitoring. In this research, our objectives were to study recovery strategies and integrate indicators for monitoring the reclamation of an agricultural soil after bauxite mining. Distinct fertilizations (nonfertilized control [CT], poultry litter [PL], chemical fertilization [CF], and PL + CF combined) and intercrops (bare soil with no intercrops [NI], grass [G], legume [L], and G + L combined) treatments were used as recovery strategies to restore soil capacity to sustain a coffee plantation. We selected 27 quality indicators to compare the premining condition, postmining (reconfigured topsoil), and 19 months after the application of fertilization/intercrops treatments. We used univariate statistics to select soil quality indicators and multivariate analyses to group the selected indicators into organic, chemical, physical, and microbiological properties. From each group, one representative attribute was selected, and its averaged weight was summarized into a soil quality index (SQI). In postmining, the estimated SQI was approximately 65% lower than in premining. The SQI recalculated 19 months after the application of fertilization (PL or PL + CF) and intercrops (G, L, or G + L) was 23% higher than in postmining and showed strong correlation with coffee bean yield (at 27 months). Coffee bean yield was highest in plots with L or G + L receiving PL or PL + CF. We conclude that organic amendments and intercrops are suitable approaches to recover soil following bauxite mining, and soil indicators can be integrated to properly monitor the land reclamation progress.

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Section: Soil Sampling and Analysesmentioning

confidence: 99%

Practices for rehabilitating bauxite‐mined areas and an integrative approach to monitor soil quality

et al. 2019

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Arginine ammonification and L‐glutaminase assays as rapid indices of corn nitrogen availability

Nourbakhsh

Alinejadian

2009

Z. Pflanzenernähr. Bodenk.

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Increasing use of N fertilizer for crop production necessitates more rapid estimates on N provided by the soil in order to prevent under-or overfertilization and their adverse effect on plant nutrition and environmental quality. A study was conducted to investigate the responses of arginine ammonification (AA), L-glutaminase activity (LG), soil N-mineralization indices, corn (Zea mays L.) crop-yield estimation, and corn N uptake to application of organic amendments. The relationships between corn N uptake and the microbial and enzymatic processes which are basically related to N mineralization in soil were also studied. The soil samples were collected from 0-15 cm depth of a calcareous soil that was annually treated with 0, 25, or 100 Mg ha -1 (dryweight basis) of sewage sludge and cow manure for 7 consecutive years. Soil total N (TN), potentially mineralizable N (N 0 ), and initial potential rates of N mineralization (kN 0 ) were significantly greater in sewage sludge-treated than in cow manure-treated soils. However, the amendment type did not influence soil organic C (SOC), AA, LG, and anaerobic index of N mineralization (N ana ). The application rates proportionally increased N-availability indices in soil. Corn N concentration and uptake were correlated with indices of mineralizable N. A multiple stepwise model using AA and N ana as parameters provided the best predictor of corn N concentration (R = 0.86, p < 0.001). Another model using only LG provided the best predictor of corn N uptake (R = 0.78, p < 0.001). This results showed that sewage-sludge and cow-manure application is readily reflected in certain soil biological properties and that the biological tests may be useful in predicting N mineralization and availability in soil.

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Deadwoods are hotspots for soil functions in old-growth beech forests: monitoring during 15 years after a windthrow event

2023

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Estimation of microbial activities

Cited by 11 publications

References 176 publications

Practices for rehabilitating bauxite‐mined areas and an integrative approach to monitor soil quality

Practices for rehabilitating bauxite‐mined areas and an integrative approach to monitor soil quality

Arginine ammonification and L‐glutaminase assays as rapid indices of corn nitrogen availability

Deadwoods are hotspots for soil functions in old-growth beech forests: monitoring during 15 years after a windthrow event

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