2016
DOI: 10.1016/j.agee.2016.09.010
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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

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Cited by 68 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%
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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 normalδ0.25em()=[]()Rsample/Rstandard1×1,000, 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%
“…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%
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