Organic carbon density and storage of the major black soil regions in Northeast China

Li, H; Pei, Jiubo; Wang, J.K; Li, S.Y; Gao, Guoqiang

doi:10.4067/s0718-95162013005000070

Cited by 7 publications

(5 citation statements)

References 21 publications

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“…Organic matter is essential in the stabilization of soil aggregates, water infiltration, conservation of biogeochemical nutrient cycles, and erosion control. The soil organic carbon pool is an important part of the global carbon pool and plays an essential role in global climate change and ecosystem stability (Li et al, 2013). The susceptibility of soils to erosion in Mediterranean mountainous areas largely depends on upper mineral soil horizon properties, which are controlled by or related to humus form development (Sevink et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Soil organic matter quality in three Mediterranean environments (a first barrier against desertification in Europe)

Aranda

Comino

2014

J. Soil Sci. Plant Nutr.

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The aim of this study was to establish the effect of parent material, climate conditions and vegetation type on soil organic matter (SOM) quality in different Mediterranean environments as an essential step for assessing soil stability; ecosystems in the first barrier against desertification in the western Mediterranean region. Thirty-six samples were taken from the organic-mineral horizon of unreclaimed soils with calcareous, acid metamorphic and calcareous/volcanic substratums; and from beneath three vegetation types (natural forests, reforested forests and scrublands) in areas of significant ecological value. The humus fractions and soil respiratory activity of bulk soil samples were studied, and some structural features of the humic acids extracted were characterized by elemental analysis and visible and infrared spectroscopies. Results indicate that SOM in the surface horizons of the calcareous and calcareous/volcanic areas showed higher biogeochemical transformation, where microbial synthesis in humic acids formation, including condensation mechanisms, prevails. In contrast, the acid metamorphic area showed the greatest differences, and would be considered more fragile in terms of organic matter stability to changes in the biogeochemical system. The results also indicate some differences due to the type of vegetation on soil humus chemistry. Under reforested forests of Pinus in an edaphic acid environment, humic acids showed a marked aliphatic character, displayed higher 2920 cm-1 IR band, well defined typical lignin patterns, and higher E 4 /E 6 ratio, i.e., accumulation of inherited macromolecular substances. The SOM beneath scrubland and natural Quercus forests may be said to be more decomposed (active breakdown of biomacromolecules) than beneath Pinus, humic acids exhibited higher aromaticity and were associated with accumulation of newly formed perylenequinonic chromophors of fungal origin, i.e., was at more advanced and complex stages of humification.

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Section: Introductionmentioning

confidence: 99%

Soil organic matter quality in three Mediterranean environments (a first barrier against desertification in Europe)

Aranda

Comino

2014

J. Soil Sci. Plant Nutr.

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“…Previous studies showed that the driving factors of SOC prediction varied in different study areas and periods [43]. In general, SOC density depends highly on the climate regime: it decreases with temperature but increases with precipitation [45]. Over the past two decades, climate of the study region became milder and more humid.…”

Section: The Drving Factors Of Soc Prediction Modelsmentioning

confidence: 98%

Mapping Topsoil Carbon Storage Dynamics of Croplands Based on Temporal Mosaicking Images of Landsat and Machine Learning Approach

Li,

Wen,

Xing

et al. 2024

Remote Sensing

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Understanding changes of soil organic carbon (SOC) in top layers of croplands and their driving factors is a vital prerequisite in decision-making for maintaining sustainable agriculture. However, high-precision estimation of SOC of croplands at regional scale is still an issue to be solved. Based on soil samples, synthetic image of bare soil and geographical data, this paper predicted SOC density of croplands using Random Forest model in the Black Soil Region of Jilin Province, China in 2005 and 2020, and analyzed its influencing factors. Results showed that random forest model that integrates bare soil composite images improve the accuracy and robustness of SOC density prediction. From 2005 to 2020, the total SOC storage in croplands decreased from 89.96 to 82.79 Tg C with an annual decrease of 0.48 Tg C yr−1. The mean value of SOC density of croplands decreased from 3.42 to 3.32 kg/m2, and high values are distributed in middle parts. Changes of SOC represented significant heterogeneity spatially. 62.14% of croplands with SOC density greater than 4.0 kg/m2 decreased significantly, and 38.60% of croplands with SOC density between 2.5 and 3.0 kg/m2 significantly increased. Climatic factors made great contributions to SOC density, however, their relative importance (RI) to SOC density decreased from 44.65% to 37.26% during the study period. Synthetic images of bare soil constituted 23.54% and 26.29% of RI in the SOC density prediction, respectively, and the contribution of each band was quite different. The RIs of topographic and vegetation factors were low but increased significantly from 2005 to 2020. This study can aid local land managers and governmental agencies in assessing carbon sequestration potential and carbon credits, thus contributing to the protection and sustainable use of black soils.

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“…In addition, even a slight reduction in C from the substantial SOC pool (approximately 4 Pg) in Mollisols could lead to significant CO 2 emissions within these regions (Cheng et al, 2010). For instance, the average C release rate from Mollisols in Northeast China ranged from 0.17 to 2.17 Tg C yr. −1 , significantly surpassing the global average of 0.09-0.78 Tg C yr. −1 from the pedological C pool (Lal et al, 2007;Li et al, 2013). Therefore, strategic C sequestration in Mollisols is crucial not only for ensuring food security and promoting soil stability but also for effectively mitigating global climate change.…”

Section: Introductionmentioning

confidence: 99%

Both yields of maize and soybean and soil carbon sequestration in typical Mollisols cropland decrease under future climate change: SPACSYS simulation

Liang,

Sun,

Longdoz

et al. 2024

Front. Sustain. Food Syst.

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Although Mollisols are renowned for their fertility and high-productivity, high carbon (C) losses pose a substantial challenge to the sustainable provision of ecosystem services, including food security and climate regulation. Protecting these soils with a specific focus on revitalizing their C sequestration potential emerges as a crucial measure to address various threats associated with climate change. In this study, we employed a modeling approach to assess the impact of different fertilization strategies on crop yield, soil organic carbon (SOC) stock, and C sequestration efficiency (CSE) under various climate change scenarios (baseline, RCP 2.6, RCP 4.5, and RCP 8.5). The process-based SPACSYS model was calibrated and validated using data from two representative Mollisol long-term experiments in Northeast China, including three crops (wheat, maize and soyabean) and four fertilizations (no-fertilizer (CK), mineral nitrogen, phosphorus and potassium (NPK), manure only (M), and chemical fertilizers plus M (NPKM or NM)). SPACSYS effectively simulated crop yields and the dynamics of SOC stock. According to SPACSYS projections, climate change, especially the increased temperature, is anticipated to reduce maize yield by an average of 14.5% in Harbin and 13.3% in Gongzhuling, and soybean yield by an average of 10.6%, across all the treatments and climatic scenarios. Conversely, a slight but not statistically significant average yield increase of 2.5% was predicted for spring wheat. SOC stock showed a decrease of 8.2% for Harbin and 7.6% for Gonghzuling by 2,100 under the RCP scenarios. Future climates also led to a reduction in CSE by an average of 6.0% in Harbin (except NPK) and 13.4% in Gongzhuling. In addition, the higher average crop yields, annual SOC stocks, and annual CSE (10.15–15.16%) were found when manure amendments were performed under all climate scenarios compared with the chemical fertilization. Soil CSE displayed an exponential decrease with the C accumulated input, asymptotically approaching a constant. Importantly, the CSE asymptote associated with manure application was higher than that of other treatments. Our findings emphasize the consequences of climate change on crop yields, SOC stock, and CSE in the Mollisol regions, identifying manure application as a targeted fertilizer practice for effective climate change mitigation.

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Organic carbon density and storage of the major black soil regions in Northeast China

Cited by 7 publications

References 21 publications

Soil organic matter quality in three Mediterranean environments (a first barrier against desertification in Europe)

Soil organic matter quality in three Mediterranean environments (a first barrier against desertification in Europe)

Mapping Topsoil Carbon Storage Dynamics of Croplands Based on Temporal Mosaicking Images of Landsat and Machine Learning Approach

Both yields of maize and soybean and soil carbon sequestration in typical Mollisols cropland decrease under future climate change: SPACSYS simulation

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