Temperature sensitivity of soil organic carbon decomposition as affected by long-term fertilization under a soybean based cropping system in a sub-tropical Alfisol

Ghosh, Avijit; Bhattacharyya, Ranjan; Dwivedi, B. S.; Meena, Mahesh Chand; Agarwal, B. K.; Mahapatra, P.; Shahi, D. K.; Salwani, R.; Agnihorti, Rajesh

doi:10.1016/j.agee.2016.09.010

Cited by 65 publications

(47 citation statements)

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“…But in the NPKL plots, there was no external C sources, apart from stubble, root biomass, and rhizodeposition. Additionally, liming increased soil aggregation, decreased Al 3+ toxicity in these acid soils, ameliorated for Ca 2+ deficiency, and increased pH by ~21% over initial values (pH = 5.3; Ghosh et al, ). Increased pH in the NPKL plots might have stimulated microbial growth, facilitating microbial‐enhanced soil nutrient cycling, and CMI.…”

Section: Discussionmentioning

confidence: 96%

“…δ 13 C of bulk soils of above four depths and aggregates of surface layers were measured using an IRMS (Isoprime 100), and δ values were computed, applying

normalδ (() ‰) = ([], ((), R_{sample} / R_{standard}) - 1) \times 1,000,

where R = 13 C/ 12 C. To estimate the C mass concentration and its isotopic measurements (δ 13 C), continuous flow‐IRMS was calibrated, and the details are given in Ghosh et al ().…”

Section: Methodsmentioning

confidence: 99%

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Long‐term fertilization effects on ¹³C natural abundance, soil aggregation, and deep soil organic carbon sequestration in an Alfisol

et al. 2018

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Although the 13C (13Carbon) natural abundance method is used to study soil C dynamics, scanty information is available on long‐term fertilization effects on soil C sequestration rates along with δ13C in surface (0–30 cm) and deep (30–90 cm) soil layers and their relationships with crop productivities in subtropics. Hence, soil aggregation, δ13C in bulk soils and aggregates, C pools, and sequestration rates were studied in an Indian Alfisol under a 43‐year old wheat (Triticum aestivum L.)‐based cropping system. Treatments were as follows: no mineral fertilizer and no manure (unfertilized control), 100% recommended dose of nitrogen (N), 100% N and 100% recommended phosphorus (NP), 100% N, 100% P, and 100% recommended potassium (NPK), NPK + lime (NPKL), 150% recommended NPK (1.5NPK), and NPK + farmyard manure at 10 Mg ha−1 (NPKF). Plots with NPKF contained 50% higher soil organic C than NPKL in surface soil (0–15‐cm layer). In the 0–90‐cm profile, soil organic C accumulation and sequestration rates in NPKF were ~0.15 and 0.11 Mg ha−1 yr−1 higher than NPKL plots, respectively. The NPKF plots had higher glomalin‐related soil protein and greater recalcitrant C than NPKL, 1.5NPK, and NPK in surface soil. The NPKF plots had higher δ13C values within bulk soils and their aggregates than NPKL and NPK. There were significant correlations between deep soil C sequestration rates with mean crop productivities and δ13C with deep soil C sequestration rates. Overall, NPKF application had the largest surface and deep soil C sequestration with highest crop productivity and hence is recommended.

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Section: Discussionmentioning

confidence: 96%

“…δ 13 C of bulk soils of above four depths and aggregates of surface layers were measured using an IRMS (Isoprime 100), and δ values were computed, applying

normalδ (() ‰) = ([], ((), R_{sample} / R_{standard}) - 1) \times 1,000,

where R = 13 C/ 12 C. To estimate the C mass concentration and its isotopic measurements (δ 13 C), continuous flow‐IRMS was calibrated, and the details are given in Ghosh et al ().…”

Section: Methodsmentioning

confidence: 99%

Long‐term fertilization effects on ¹³C natural abundance, soil aggregation, and deep soil organic carbon sequestration in an Alfisol

et al. 2018

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“…Similar C mineralization from all organically amended plots at 25°C and 0.33 bar moisture suction might be due to higher diffusion of air and water, higher microbial populations (Ghosh et al, ), and higher soil thermal insulation capacity, which optimized microbial functional capacity to mineralize C from soil in same amount (Guntiñas et al, ). With increasing moisture tension up to 1.0 bar, Ct values decreased due to deviation from the optimum conditions due to lack of sufficient moisture in soil.…”

Section: Discussionmentioning

confidence: 99%

“…Higher Kc from unfertilized plots might be due to poor soil aggregation leading to unprotected C in soil (Ghosh et al, ). At field capacity (0.33 bar), Kc values did not differ among the treatments at both temperatures due to higher heat capacity of soil, higher diffusion of air and water, and higher microbial populations and enzyme activities, but Kc values decreased at 1.0 bar moisture tension due to rising abnormality under moisture stress conditions.…”

Section: Discussionmentioning

confidence: 99%

“…Based on mean residence time total SOC has been portioned into labile and recalcitrant C. Generally, microbial biomass C (MBC), particulate organic C, and KMnO 4 oxidizable C are soil quality indicators as soil management practices primarily alter them (Sherrod et al, 2005). Soil C fractions are influenced by many factors such as climate and soil conditions (Ghosh et al, 2016;Miller et al, 2004), cropping systems, and managements including tillage (Ogle et al, 2005) and fertilization (Basak & Biswas, 2014;Basak et al, 2012;Ghosh et al, 2018;He et al, 2018;Kundu et al, 2007;Moharana et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Dependence of Thermal and Moisture Sensitivity of Soil Organic Carbon Decomposition on Manure Composition in an Inceptisol Under a 5‐Year‐Old Maize‐Wheat Cropping System

et al. 2018

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Hydrothermal sensitivity of soil organic carbon decomposition in relation to global climatic changes is of great importance for C cycle in an agro‐ecosystem. To assess the sensitivities of SOC as affected by different organic sources and mineral fertilizer in Inceptisol, soil samples from a 5‐year‐old field experiment were collected from unfertilized control, 100% NPK, vermicompost, compost, and farmyard manure (FM) treated plots and analyzed for total organic C, labile C fractions and C mineralization kinetics by incubating soils at 25 and 35°C temperatures, and 0.33 and 1.0 bar soil moisture for 90 days. Compost and FM‐treated plots had ~23 and 22% higher total organic C than 100% NPK plots, respectively. Plots under vermicompost had similar C management index to FM but ~12% higher than compost. At 25°C temperature and 1.0 bar moisture, CO2 evolutions from vermicompost‐ and FM‐treated plots were ~29 and 11% higher than compost, respectively. Carbon decay rate was invariably higher in control and 100% NPK than organically amended plots. Temperature sensitivity of C was similar at 0.33 bar but different at 1.0 bar among the treatments. Moisture sensitivity of C in organic amended plots was similar at 35°C but different at 25°C, but their moisture sensitivity values were always higher than NPK. It could be concluded that manures with low C/N ratio and high N and P content would reduce C decay rate. Hence, to enhance C sequestration and reduce CO2 emissions in changing climatic situation, organic manure like vermicompost could be recommended.

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Large‐scale soil organic carbon mapping based on multivariate modelling: The case of grasslands on the Loess Plateau

Wang

Deng

et al. 2017

Land Degrad Dev

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The Loess Plateau is considered one of the world's regions with severe soil erosion. Grasslands are widely distributed on the Loess Plateau, accounting for approximately 40% of the total area.Soil organic carbon (SOC) plays an important role in the terrestrial carbon cycle in this region.We compiled more than 1,000 measurements of plant biomass and SOC content derived from 223 field studies of grasslands on the Loess Plateau. Combined with meteorological factors (precipitation and air temperature) and the photosynthetically active radiation factor, the topsoil SOC contents of grasslands were predicted using the random forest (RF) regression algorithm. biomass and temperature should receive more attention due to increasing C sequestration.

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Temperature sensitivity of soil organic carbon decomposition as affected by long-term fertilization under a soybean based cropping system in a sub-tropical Alfisol

Cited by 65 publications

References 55 publications

Long‐term fertilization effects on ¹³C natural abundance, soil aggregation, and deep soil organic carbon sequestration in an Alfisol

Long‐term fertilization effects on ¹³C natural abundance, soil aggregation, and deep soil organic carbon sequestration in an Alfisol

Dependence of Thermal and Moisture Sensitivity of Soil Organic Carbon Decomposition on Manure Composition in an Inceptisol Under a 5‐Year‐Old Maize‐Wheat Cropping System

Large‐scale soil organic carbon mapping based on multivariate modelling: The case of grasslands on the Loess Plateau

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Temperature sensitivity of soil organic carbon decomposition as affected by long-term fertilization under a soybean based cropping system in a sub-tropical Alfisol

Cited by 65 publications

References 55 publications

Long‐term fertilization effects on 13C natural abundance, soil aggregation, and deep soil organic carbon sequestration in an Alfisol

Long‐term fertilization effects on 13C natural abundance, soil aggregation, and deep soil organic carbon sequestration in an Alfisol

Dependence of Thermal and Moisture Sensitivity of Soil Organic Carbon Decomposition on Manure Composition in an Inceptisol Under a 5‐Year‐Old Maize‐Wheat Cropping System

Large‐scale soil organic carbon mapping based on multivariate modelling: The case of grasslands on the Loess Plateau

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Long‐term fertilization effects on ¹³C natural abundance, soil aggregation, and deep soil organic carbon sequestration in an Alfisol

Long‐term fertilization effects on ¹³C natural abundance, soil aggregation, and deep soil organic carbon sequestration in an Alfisol