Kinetics of Carbon Mineralization and Sequestration of Sole and/or Co-amended Biochar and Cattle Manure in a Sandy Soil

Dodor, Daniel E.; Amanor, Yahaya J.; Asamoah-Bediako, Abena; MacCarthy, Dilys S.; Dovie, Delali B.K.

doi:10.1080/00103624.2019.1671443

Cited by 11 publications

(3 citation statements)

References 51 publications

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“…The strong and positive correlation between the estimated N max and N o values reported for the long-term incubation of soils of wide and varied properties indicates that the two procedures may be measuring the same pools of potentially mineralizable and available N. The strong relationship between f CO 2 and N o can be explained by the stoichiometric requirement for labile C and N by microbial populations [35]; whereby, soils with high f CO 2 , indicative of a high availability of labile SOC to drive microbial activity, also have a larger pool of labile and potentially mineralizable N. The results corroborate those of other workers showing that f CO 2 is closely related to the net N mineralization during a 24-day incubation [8]. Furthermore, previous studies using 13 uncultivated and unfertilized soils from Iowa, USA showed that the estimated N max values related strongly to the amount of N mineralized in two weeks under aerobic and anaerobic incubation conditions at 30 • C, N released by 2 M KCl extraction at 80 • C for 20 h, and the initial NH 4 + -N present in the soils [18].…”

Section: Discussionmentioning

confidence: 85%

Evaluation of Alkaline Hydrolyzable Organic Nitrogen as an Index of Nitrogen Mineralization Potential of Some Coastal Savannah Soils of Ghana

et al. 2022

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Numerous biological and chemical methods have been proposed over the years for estimating the nitrogen (N) mineralization capacity of soils; however, none of them has found general use in soil fertility testing. The efficacy of a recently proposed alkaline hydrolysis method for assessing N availability in soils compared with the standard long-term incubation technique for determining potentially available N was evaluated. The nitrogen mineralization of 12 surface soils incubated under aerobic conditions at 25 °C for 26 weeks was determined. Field-moist soils were direct-steam distilled with 1 M KOH or 1 M NaOH; the NH3 released was trapped in boric acid, and its concentration was determined successively every 5 min for 40 min. The cumulative N mineralized or hydrolyzed was fitted to the first-order exponential equation to determine the potentially mineralizable N (No) and an analogous “potentially hydrolyzable N (Nmax)” for the soils. The flush of CO2 (fCO2) following the rewetting and incubation of air-dried soils under aerobic conditions for 3 days was also determined. The results showed that the Nmax values differed considerably among the soils, indicating differences in the chemical nature and reactivity of the organic N content of the soils, and were significantly correlated with No and fCO2 values. The estimated Nmax and No values ranged from 105 to 371 mg N kg−1 and 121 to 292 mg kg−1, respectively. Based on the simple and inexpensive nature of the alkaline hydrolysis procedure, the reduction in the incubation time required to obtain No (months to minutes), and the strong association between Nmax and No, we concluded that Nmax is a good predictor of the biologically discrete and quantifiable labile pool of mineralizable soil organic N (ON), and the use of the alkaline hydrolyzable ON as a predictor of No merits consideration for routine use in soil testing laboratories for estimating the N-supplying capacity of soils.

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Section: Discussionmentioning

confidence: 85%

Evaluation of Alkaline Hydrolyzable Organic Nitrogen as an Index of Nitrogen Mineralization Potential of Some Coastal Savannah Soils of Ghana

et al. 2022

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“…When organic amendments are applied to soil, they generally induce an increase in CO 2 emissions (Darby et al., 2016; Lévesque et al., 2018), such as the one observed in our study. Such an increase is related to: (i) the input of OM, especially C, into the soil (Teutscherova et al., 2017) from the amendments that are rich in organic C, which can be mineralized by the microorganisms in the soil (Cui et al., 2017; Dodor et al., 2019); (ii) the amelioration of the soil physical structure, that is the reduction in the bulk density, the increase in soil aeration and porosity, which favour the microbial activity (as shown with the increase in C enzymes with manure), and thus the C mineralization (Rogovska et al., 2011). In addition, gas diffusion is also improved in soils with better pore connectivity and where moisture retention is reduced; (iii) a priming effect, that is the mineralization of the soil OM itself, via an important stimulation of the microbial activity (Dodor et al., 2019).…”

Section: Discussionmentioning

confidence: 99%

Combined biochar and manure addition to an agricultural soil benefits fertility, microbial activity, and mitigates manure‐induced CO₂ emissions

Lebrun,

Zahid,

Bednik

et al. 2023

Soil Use and Management

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The importance of blending biochar into manure prior to its application as a soil amendment was investigated by this laboratory and field study, hypothesizing an (i) increase in soil fertility; (ii) improvement in microbial activity; (iii) reduction in manure‐induced CO2 emissions after combining amendments. Biochar was mixed with manure (50:50 V/V) and aged in field conditions for 6 months whereafter pristine biochar, manure, and manured biochar (50:50 V/V) were incorporated into an agricultural drought‐prone Regosol. All treatments and soil mixtures were incubated, with laboratory measurements of CO2 emissions taken using a coupled column respirometer set up, while nutrient availabilities as well as enzymatic activities were also tested. Demonstrable benefits of the biochar when blended to manure were exemplified in reduced CO2 emissions, by 60% compared with manure alone, and improved C and N acquisition by microorganisms. When applied to soil, blended biochar manure did not enhance CO2 emissions, but did significantly improve soil fertility by the avoidance of leaching of non‐plant consumed nutrients from the soil (e.g. NO3− by 58%). A significant increase in functional diversity indices in the presence of manured biochar highlights the added value of the blended approach. Field application yielded reduced effects; manure induced a higher carbon and nitrogen mineralization (thus potentially higher C and N emissions via CO2, CH4 and N2O) as well as a higher microbial functional diversity. Further studies should verify the effects observed here in a range of soil types and climates.

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“…Many organic amendments have been studied for their influence on soil C storage and benefits in C sequestration by plants, among them sewage sludge [59], composted materials [60], cattle manure [61] or horse manure [62]. Although the addition of organic matter, fresh or composted, is also a source of CO 2 due to soil respiration, we should consider the positive benefits derived from the transformation process of the organic matter in the soils, giving stabilized organic compounds (humus) that can be present for decades.…”

Section: The Carbon Cyclementioning

confidence: 99%

Potential and Constraints of Use of Organic Amendments from Agricultural Residues for Improvement of Soil Properties

Paradelo,

Navarro-Pedreño,

Glaser

et al. 2023

Sustainability

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Agricultural residues are produced in large quantities and their management is an issue all over the world. Many of these residues consist of plant materials in different degrees of transformation, so returning them back to soil is a management option that closes loops in a circular economy context. The objective of this paper is to summarize current knowledge on the options and effects of reusing agricultural residues as organic soil amendments. The reuse of these residues in soil is a good solution for minimizing the problems associated with their management, while improving soil health and ecosystem functions. While some agricultural residues can be applied directly to soil, others will need previous transformations such as composting to improve their properties. This allows the recovery of plant nutrients and increase in soil organic matter contents, with many positive effects on the soil’s physical, chemical and biological properties, and ultimately, crop production, although potential risks derived from some materials must also be considered. The concept of regenerative agriculture and soil management using organic soil amendments contribute to the significant enhancement of soil biodiversity, the protection of the environment and climate goal achievement.

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Kinetics of Carbon Mineralization and Sequestration of Sole and/or Co-amended Biochar and Cattle Manure in a Sandy Soil

Cited by 11 publications

References 51 publications

Evaluation of Alkaline Hydrolyzable Organic Nitrogen as an Index of Nitrogen Mineralization Potential of Some Coastal Savannah Soils of Ghana

Evaluation of Alkaline Hydrolyzable Organic Nitrogen as an Index of Nitrogen Mineralization Potential of Some Coastal Savannah Soils of Ghana

Combined biochar and manure addition to an agricultural soil benefits fertility, microbial activity, and mitigates manure‐induced CO₂ emissions

Potential and Constraints of Use of Organic Amendments from Agricultural Residues for Improvement of Soil Properties

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Kinetics of Carbon Mineralization and Sequestration of Sole and/or Co-amended Biochar and Cattle Manure in a Sandy Soil

Cited by 11 publications

References 51 publications

Evaluation of Alkaline Hydrolyzable Organic Nitrogen as an Index of Nitrogen Mineralization Potential of Some Coastal Savannah Soils of Ghana

Evaluation of Alkaline Hydrolyzable Organic Nitrogen as an Index of Nitrogen Mineralization Potential of Some Coastal Savannah Soils of Ghana

Combined biochar and manure addition to an agricultural soil benefits fertility, microbial activity, and mitigates manure‐induced CO2 emissions

Potential and Constraints of Use of Organic Amendments from Agricultural Residues for Improvement of Soil Properties

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Product

Resources

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Combined biochar and manure addition to an agricultural soil benefits fertility, microbial activity, and mitigates manure‐induced CO₂ emissions