Influence of Clay Mineralogy on Soil Organic Carbon Stabilization under Tropical Climate, India

Das, Abinash; Purakayastha, T. J.; Ahmed, Nayan; Das, Ruma; Biswas, Sunanda; Shivay, Yashbir Singh; Sehgal, Vinay Kumar; Rani, Khushboo; Trivedi, Ankita; Tigga, Priti; Sahoo, J.; Chakraborty, Ranabir; Sen, Suman

doi:10.1007/s42729-022-01099-x

Cited by 11 publications

(6 citation statements)

References 70 publications

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“…The BC mineralization rates of our study are within the range of those reported by others in long-term incubation experiments in various soil types 17 , 22 . However, others measured much higher mineralization rates in Alfisol and Mollisol from different locations of the world 9 , 12 , 100 , 101 . The difference in BC decomposition rates may be mainly explained by the differences in BC properties due to the different pyrolysis temperatures.…”

Section: Discussionmentioning

confidence: 98%

Biochar aided priming of carbon and nutrient availability in three soil orders of India

Purakayastha,

Bera,

Dey

et al. 2024

Sci Rep

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In recent years biochar (BC) has gained importance for its huge carbon (C) sequestration potential and positive effects on various soil functions. However, there is a paucity of information on the long-term impact of BC on the priming effect and nutrient availability in soil with different properties. This study investigates the effects of BC prepared from rice husk (RBC4, RBC6), sugarcane bagasse (SBC4, SBC6) and mustard stalk (MBC4, MBC6) at 400 and 600 °C on soil C priming and nitrogen (N), phosphorus (P), and potassium (K) availability in an Alfisol, Inceptisol, and Mollisol. BC properties were analyzed, and its decomposition in three soil orders was studied for 290 days in an incubation experiment. Post-incubation, available N, P, and K in soil were estimated. CO2 evolution from BC and soil alone was also studied to determine the direction of priming effect on native soil C. Increasing pyrolysis temperature enhanced pH and EC of most of the BC. The pyrolysis temperature did not show clear trend with respect to priming effect and nutrient availability across feedstock and soil type. MBC6 increased C mineralization in all the soil orders while RBC6 in Alfisol and SBC6 in both Inceptisol and Mollisol demonstrated high negative priming, making them potential amendments for preserving native soil C. Most of the BC showed negative priming of native SOC in long run (290 days) but all these BC enhanced the available N, P, and K in soil. SBC4 enhanced N availability in Alfisol and Inceptisol, RBC4 improved N and P availability in Mollisol and P in Alfisol and MBC6 increased K availability in all the soils. Thus, based on management goals, tailored BC or blending different BC can efficiently improve C sequestration and boost soil fertility.

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Section: Discussionmentioning

confidence: 98%

Biochar aided priming of carbon and nutrient availability in three soil orders of India

Purakayastha,

Bera,

Dey

et al. 2024

Sci Rep

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“…The RGRI has been primarily used to assess the development of tree leaves and can also serve as a parameter for estimating the SOC content in forested areas [48]. The CMR is related to soil minerals and clay content and has been selected as a predictive covariate in SOC spectral estimation models [69][70][71]. The FWI can distinguish healthy and unhealthy forest areas and has been used for the indirect evaluation of the SOC content in forested areas [21,72,73].…”

Section: Discussionmentioning

confidence: 99%

Collaborative Utilization of Sentinel-1/2 and DEM Data for Mapping the Soil Organic Carbon in Forested Areas Based on the Random Forest

Wang,

Zhang,

et al. 2024

Forests

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Optical remote sensing data are widely used for constructing soil organic carbon (SOC) mapping models. However, it is challenging to map SOC in forested areas because atmospheric water vapor affects the results derived from optical remote sensing data. To address this issue, we utilized Sentinel-1, Sentinel-2, and digital elevation model (DEM) data to obtain a comprehensive feature set (including S1-based textural indices, S2-based spectral indices, and DEM-derived indices) to map the SOC content in forested areas. The features set were the predictor variables, and the measured SOC content was the dependent variable. The random forest algorithm was used to establish the SOC model. The ratio of performance to inter-quartile range (RPIQ) was 2.92 when the S2-based spectral indices were used as predictor variables. When the comprehensive feature set was utilized as the model input, the model achieved an RPIQ of 4.13 (R2 = 0.91, root mean square error (RMSE) = 9.18), representing a 41.44% improvement in model accuracy. The average SOC content in the Greater Khingan Mountains was 43.75 g kg−1. The northern and southwestern parts had higher SOC contents (>54.93 g kg−1), while the southeastern and northwestern parts had lower contents (<39.83 g kg−1). This discrepancy was primarily attributed to agricultural activities. The results indicate that using a comprehensive feature set and the random forest algorithm is a reliable approach for estimating the spatial distribution of the SOC content in forested areas and is suitable for forest ecology and carbon management studies.

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“…It was evident that the mineralogy of Alfisol was dominated by kaolinite (1:1 mineral type) and less dominated by illite and vermiculite (Table 4). The presence of illite, kaolinite and vermiculite in Alfisol has been previously reported [32,56]. Alfisols are moderately leached acidic soils that form in temperate humid and subhumid regions under forest and possess a subsurface horizon in which clays accumulate [57]; this means that soil minerals may be hydrolyzed, causing a transformation of 2:1 type to 1:1 type minerals and the formation of more gibbsite and kaolinite [58].…”

Section: Mineral Evolution In Regional Forest Soils and Its Role In S...mentioning

confidence: 90%

The Different Roles of Mineralogy in Soil Organic Carbon Accumulation in Northern and Southern China

Liu,

Huang,

Ndzelu

et al. 2023

Forests

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The sequestration of soil organic carbon (SOC) through mineral protection is an important approach to mitigating climate change. However, the effect of mineral composition on SOC stability is unclear at regional scales. In this study, we investigated the relationship between mineralogy and SOC in Alfisol and Mollisol from southern and northern regions of China. We analyzed soil at two layers for its SOC fractions, mineralogical characteristics and functional groups. It was found that the majority of SOC was stored as mineral-associated organic C (MAOC), which had higher δ13C values and narrower C/N ratios compared to particulate organic C. In Mollisol, the proportion of MAOC and the abundance of aromatic C were higher than that in Alfisol, while polysaccharide C was lower. Compared to Alfisol, Mollisol was dominated by illite, and had significantly (p < 0.05) lower iron (Fe) and aluminum (Al) sesquioxides contents. The SOC content was positively correlated with illite in Mollisol, and with Fe and Al sesquioxides in Alfisol. The random forest model identified sesquioxides as the most important determinant of SOC accumulation (36%), followed by SOC fractions (18%) and functional groups (18%). In summary, our study suggests that SOC protection through mineralogy depends more on the composition of the host minerals, and not just on the clay content, and aromatic C is also important in the stabilization of SOC.

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Influence of Clay Mineralogy on Soil Organic Carbon Stabilization under Tropical Climate, India

Cited by 11 publications

References 70 publications

Biochar aided priming of carbon and nutrient availability in three soil orders of India

Biochar aided priming of carbon and nutrient availability in three soil orders of India

Collaborative Utilization of Sentinel-1/2 and DEM Data for Mapping the Soil Organic Carbon in Forested Areas Based on the Random Forest

The Different Roles of Mineralogy in Soil Organic Carbon Accumulation in Northern and Southern China

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