Microwave assisted biocidal extraction is an alternative method to measure microbial biomass of carbon from cultivated and non-cultivated soils

Bertozzi, Janksyn; Andrade, Diva Souza; Oliveira, Celso Maran de; Bala, Abdullahi; Caviglione, João Henrique

doi:10.1007/s42770-019-00186-z

Cited by 3 publications

(2 citation statements)

References 46 publications

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“…However, the percentage of microbial C related to organic C may vary with soil, crop management and climatic conditions, indicating no universal equilibrium constant (Anderson & Domsch, 1989). In a set of twenty-eight tropical soils from uncultivated (forest and native pastures) and agricultural soils, the microbial index (% C mic to C org ) on average ranged from 0.35 in soil cultivated with soybean to 2.02% with maize (Bertozzi et al, 2020).…”

Section: Soil Microbial Biomass and Enzymementioning

confidence: 99%

Residual effects of agricultural gypsum on soil chemical and microbiological characteristics

Luiz

Zanão

Ribeiro

et al. 2022

Soil Use and Management

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Agricultural gypsum can improve the chemical quality of low fertility soil, providing calcium and sulphur. In this study, we evaluated the effects of agricultural gypsum application at five dosage rates (0, 3, 6, 9 and 12 Mg ha−1) on the chemical and microbial soil characteristics of an acid oxisol (0–0.1 m and 0.1–0.2 m layers) and the impact on wheat grain yield. Increasing agricultural gypsum dosage rates increased Ca, S as well as the Ca/Mg ratio and microbial biomass of carbon in the 0–01 m soil layer. In the 0.1–0.2 m soil layer, agricultural gypsum affected organic C (Corg), Ca and the Ca/Mg ratio. The microbial biomass of carbon had positive correlations with most chemical and microbial variables. In the 0–0.1 m soil, the microbial biomass of C and N had negative relationships with arylsulphatase and β‐glucosidase, respectively. At 0.1–0.2 m depth, arylsulphatase activity correlated negatively with Corg and positively with Al. Agricultural gypsum soil amendments increased the microbial biomass of carbon, especially at the highest application rate (12 Mg ha−1). The highest biochemical index activity was found in the 3 Mg ha−1 (0–0.1 m) and 9 Mg ha−1 (0.1–0.2 m) treatments. At 70 months after application, we found that maximum wheat grain yield was rendered by an agricultural gypsum application rate close to 3 Mg ha−1.

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Section: Soil Microbial Biomass and Enzymementioning

confidence: 99%

Residual effects of agricultural gypsum on soil chemical and microbiological characteristics

Luiz

Zanão

Ribeiro

et al. 2022

Soil Use and Management

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“…Soil microbial biomass carbon (MBC) and nitrogen (MBN); urease; invertase; acidbase phosphatase (AKPase and APase) activities; and the number of fungi, bacteria, and actinomycetes were selected. MBC and MBN were measured using a chloroform fumigation extraction (CFE) method with 0.5 mol•L −1 K 2 SO 4 as an extractant [28,29]; after thawing and filtering the extract, it was directly measured using the TOC analyzer (Multi N/C 3000, Jena, Germany). Microbial biomass carbon (MBC) = EC/KC, and EC represents the difference between the leached organic carbon of non-fumigated and fumigated control soil; KC is the conversion coefficient, and the value is 0.38.…”

Section: Measurements Of Soil Microorganismsmentioning

confidence: 99%

Reducing Nutrient Loss Caused by Thinning: Effects of Four Composts of Forest Thinning Shreds on Soil Nutrients and Tree Growth in Semimature Pinus tabuliformis Carr., Beijing, China

Zhu

et al. 2022

Forests

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Traditional methods to deal with thinning shreds (twigs, bark, etc.) include using them as fuelwood (artificially taken out of the forest) and stacking in situ natural decompositions (slow decomposition and nutrient return to the field). These methods will cause the loss of nutrients in the forest, and composting with additives can effectively promote nutrient circulation effectively. The purpose of our study was to explore the effects of composts of forest thinning shreds with different additives on soil and tree growth in semimature Pinus tabuliformis Carr. We selected four composts of forest thinning shreds (T1 adjustment of C/N and C/P + 0.2% priming; T2: adjustment of C/N and C/P + 0.2% common compost; T3: adjustment of C/N and C/P only; T4: raw material grinding of thinning shreds) and applied them in the volume of 900 g·m−2, which were made in the early stage. The soil nutrient content, microbial characteristics, and growing volume of Pinus tabuliformis were measured at 0.5, 1, and 1.5 years after fertilization. The soil became acid after one year of fertilization, having a great impact on the 0–20 cm soil layer. At 0.5 years of fertilization, the total nitrogen (TN) content of the soil with priming compost (T1) was 1.5 times higher than that of the control group (T5); the soil organic matter (SOM) was increased by 4.93–6.41 mg·kg−1. After one year of fertilization, the difference in the soil microbial carbon and nitrogen (MBC and MBN) content of each treatment decreased gradually. Soil sucrase activity was the highest after fertilization, and different composts had the greatest impact on urease activity in the 0–20 cm layer; the alkaline phosphatase (AKPase) activity of soil with common compost (T2) changed the most, and after 0.5 years of fertilization, the acid phosphatase (APase) activity of T1 in the two layers increased by 0.31 mg·g−1 and 0.1 mg·g−1, and the increase in of T2 was slightly lower than that of T1. There were significant differences in the number of bacteria, fungi, and actinomycetes compared to T1 and T2 with other treatments. T1 promoted the height growth (H) of trees three times higher than T5 and T2 promoted the growth of diameter at breast height (DBH) by 2.5 cm. The results showed that T1 and T2 had obvious effects on promoting soil nutrient content, microbial biomass accumulation, and forest growth, and the application of compost had no significant effect on promoting understory regeneration. The findings of this study show that using compost with priming can effectively increase the soil nutrient content, microbial activity, and quantity of Pinus tabuliformis effectively in terms of promoting the growth of trees and reducing the nutrient loss caused by thinning.

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Carbon Pool Dynamic and Soil Microbial Respiration Affected by Land Use Alteration: A Case Study in Humid Subtropical Area

Ghorbani

Amirahmadi

Konvalina

et al. 2023

Land

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Alterations of soil characteristics frequently accompany adaptations of pristine areas to different land uses, and these shifts have an impact on the overall ecosystem. Soil carbon stores and atmospheric CO2 emissions are directly affected by those adaptations in farming management and land usage. To comprehend the mechanisms involved in the carbon pool, this study was conducted in a subtropical region by considering six contiguous land uses; pasture, rice land, kiwi orchard, tea land, woodland, and uncultivated land. A CO2 trap was used to quantify CO2 emissions for six weeks, and the obtained data were used to analyze CO2 respiration. In comparison to other land uses, the pasture and woodland showed the best results in soil microbial respiration (SMR), significantly higher than other land uses, with values of 2561.2 and 2334.8 mg CO2-C kg−1 soil, respectively. Tea land and uncultivated land demonstrated considerably increased microbial metabolic quotients (MMQ) compared to other land uses. Whereas with an increase in soil depth, the MMQ significantly increased in tea and uncultivated lands, other land uses did not show significant changes with depth. Compared to other land uses, pasture, and forest areas boosted soil organic carbon (SOC) and microbial biomass carbon (MBC) both in the top and subsoil. It is reasonable to assume that the amount of SOC and MBC in the soil significantly dropped when the land was converted from pasture and woodland to other land uses.

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Microwave assisted biocidal extraction is an alternative method to measure microbial biomass of carbon from cultivated and non-cultivated soils

Cited by 3 publications

References 46 publications

Residual effects of agricultural gypsum on soil chemical and microbiological characteristics

Residual effects of agricultural gypsum on soil chemical and microbiological characteristics

Reducing Nutrient Loss Caused by Thinning: Effects of Four Composts of Forest Thinning Shreds on Soil Nutrients and Tree Growth in Semimature Pinus tabuliformis Carr., Beijing, China

Carbon Pool Dynamic and Soil Microbial Respiration Affected by Land Use Alteration: A Case Study in Humid Subtropical Area

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