Effects of Tillage and Nitrogen Fertilizers on CH4 and CO2 Emissions and Soil Organic Carbon in Paddy Fields of Central China

Soil organic carbon (SOC) concentration is closely related to soil quality and climate change. The objectives of this study were to estimate the effects of contemporary land use on SOC concentrations at 0–20 cm depths, and to investigate the dynamics of SOC in paddy-field soil and dry-land soil after their conversion from natural wetlands (20 and 30 years ago). We investigated the dissolved organic carbon (DOC), light fraction organic carbon (LFOC), heavy fraction organic carbon (HFOC), and other soil properties (i.e., moisture content, bulk density, pH, clay, sand, silt, available phosphorous, light fraction nitrogen, and heavy fraction nitrogen) in natural wetlands, constructed wetlands, fishponds, paddy fields, and soybean fields. The results indicated that the content of DOC increased 17% in constructed wetland and decreased 39% in fishponds, and the content of HFOC in constructed wetland and fishponds increased 50% and 8%, respectively, compared with that in natural wetlands at 0–20 cm. After the conversion of a wetland, the content of HFOC increased 72% in the paddy fields and decreased 62% in the dry land, while the content of DOC and LFOC decreased in both types. In the paddy fields, LFOC and HFOC content in the topmost 0.2 m of the soil layer was significantly higher compared to the layer below (from 0.2 to 0.6 m), and there were no significant differences observed in the dry land. The findings suggest that the paddy fields can sequester organic carbon through the accumulation of HFOC. However, the HFOC content decreased 22% after 10 years of cultivation with the decrease of clay content, indicating that paddy fields need to favor clay accumulation for the purpose of enhancing carbon sequestration in the paddy fields.

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The significant role of inorganic matters in preservation and stability of soil organic carbon in the Baoji and Luochuan loess/paleosol profiles, Central China

CATENA ◽

10.1016/j.catena.2013.04.001 ◽

2013 ◽

Vol 109 ◽

pp. 186-194 ◽

Cited By ~ 3

Author(s):

Chao Wang ◽

Fuchun Li ◽

Huanzhi Shi ◽

Zhangdong Jin ◽

Xuhui Sun ◽

...

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Significant Role ◽

Central China

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Soil organic carbon accumulation and carbon dioxide emissions during a 6-year study in irrigated continuous maize under two tillage systems in semiarid Mediterranean conditions

Spanish Journal of Agricultural Research ◽

10.5424/sjar/2021191-16260 ◽

2021 ◽

Vol 19 (1) ◽

pp. e1102

Author(s):

Maroua Dachraoui ◽

Aurora Sombrero

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Soil Temperature ◽

Grain Yield ◽

Co2 Emissions ◽

Carbon Dioxide Emissions ◽

Carbon Accumulation ◽

No Tillage ◽

Short Term ◽

The Impact

Aim of study: To evaluate the effects of conventional tillage (CT) and no tillage (NT) systems on the soil organic carbon (SOC) changes, CO2 emissions and their relation with soil temperature and grain yield in a monoculture of irrigated maize during six years.Area of study: In Zamadueñas experimental field in the Spanish province of Valladolid, from 2011 to 2017.Material and methods: The SOC content was determined by collecting soil samples up to 30 cm in November at two years interval. Short-term CO2 emissions were measured simultaneously with soil temperature using a respiration chamber and a hand-held probe immediately before, after every tillage operation and during the maize cycle.Main results: The SOC stock of the top 30 cm soil layers was 13% greater under NT than CT. Short-term CO2 emissions were significantly higher under CT ranging from 0.8 to 3.4 g CO2 m-2 h-1 immediately after tillage while under NT system, soil CO2 fluxes were low and stable during this study period. During the first 48 h following tillage, cumulative CO2 emissions ranged from 0.6 to 2.4 Mg CO2 ha-1 and from 0.2 to 0.3 Mg CO2 ha-1 under CT and NT systems, respectively. Soil temperature did not show significant correlation with CO2 emissions; however, it depended mostly on the time of measurement.Research highlights: No tillage increased the SOC accumulation in the topsoil layer, reduced CO2 emissions without decreasing maize grain yield and minimized the impact on climate change compared to CT system.

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Effects of Understory Liana Trachelospermum jasminoides on Distributions of Litterfall and Soil Organic Carbon in an Oak Forest in Central China

Sustainability ◽

10.3390/su9061019 ◽

2017 ◽

Vol 9 (6) ◽

pp. 1019 ◽

Cited By ~ 1

Author(s):

Yanchun Liu ◽

Qing Shang ◽

Bo Zhang ◽

Kesheng Zhang ◽

Junwei Luan

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Central China ◽

Oak Forest

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Soil organic carbon and phosphorus availability regulate abundance of culturable phosphate-solubilizing bacteria in paddy fields

Pedosphere ◽

10.1016/s1002-0160(17)60403-x ◽

2020 ◽

Vol 30 (3) ◽

pp. 405-413 ◽

Cited By ~ 3

Author(s):

Arvind KUMAR ◽

Lal Chand RAI

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Phosphorus Availability ◽

Paddy Fields ◽

Phosphate Solubilizing Bacteria ◽

Phosphate Solubilizing

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Response of soil organic carbon fractions and CO2 emissions to exogenous composted manure and calcium carbonate

Journal of Soils and Sediments ◽

10.1007/s11368-018-1946-y ◽

2018 ◽

Vol 18 (5) ◽

pp. 1832-1843 ◽

Cited By ~ 4

Author(s):

Zhonghui Li ◽

Binmeng Wei ◽

Xudong Wang ◽

Yulin Zhang ◽

Afeng Zhang

Keyword(s):

Calcium Carbonate ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Co2 Emissions ◽

Carbon Fractions ◽

Organic Carbon Fractions ◽

Soil Organic Carbon Fractions

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An Integrated Model Approach for Quantifying Carbon Emissions From Residue-Based Biofuel Production

Volume 2A: 33rd Computers and Information in Engineering Conference ◽

10.1115/detc2013-13491 ◽

2013 ◽

Author(s):

Jared M. Abodeely ◽

David J. Muth ◽

Joshua Koch ◽

Kenneth M. Bryden

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Co2 Emissions ◽

Land Management ◽

Soil Type ◽

Co2 Emission ◽

Integrated Model ◽

Soil Types ◽

County Level ◽

Residue Removal

This paper presents an agricultural residue removal decision framework that couples the environmental process models WEPS, RUSLE2, SCI, and DAYCENT. One of the goals of this integrated model is to quantify the impacts of land management strategies on soil organic carbon and CO2 emissions. Soil, climate, and land management practices are considered in determining sustainable residue removal rates using wind- and water-induced soil erosion and qualitative soil organic carbon constraints and to quantify the long-term impacts of sustainable residue removal on soil organic carbon and greenhouse gas emissions. Using this integrated model sustainable residue removal for four crop rotations, three tillage regimes, and four soil types representing nearly 70% of the arable acres in Boone County, Iowa are examined. Each scenario was performed for a twenty-year period. Soil organic carbon and CO2 emission results are aggregated by soil type using crop rotation and tillage statistics. The soil type results are aggregated using a normalized percentage area to provide a county level estimate of soil organic carbon changes and CO2 emissions. Results show that for the largest sustainable residue removal rate that soil organic carbon increased 3.53–6.63 Mg/ha over the 20 year simulation and that CO2 emissions ranged from 3.50–4.23 Mg/ha across the four soil types resulting in an average increase of soil organic carbon of 4.85 Mg/ha and CO2 emission of 3.77 Mg/ha at the county level.

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Correction to: Effect of the combined application of fungal residue and chemical fertilizers on the mineralization of soil organic carbon in paddy fields

Environmental Science and Pollution Research ◽

10.1007/s11356-019-05793-9 ◽

2019 ◽

Vol 26 (23) ◽

pp. 23305-23305

Author(s):

Sibo Shi ◽

Xudong Wang ◽

Zhengqian Ye ◽

Wenbo Chen ◽

Ting Li ◽

...

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Paddy Fields ◽

Chemical Fertilizers ◽

Combined Application

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Effects of Residue Returning on Soil Organic Carbon Storage and Sequestration Rate in China’s Croplands: A Meta-Analysis

Agronomy ◽

10.3390/agronomy10050691 ◽

2020 ◽

Vol 10 (5) ◽

pp. 691

Author(s):

Xudong Wang ◽

Cong He ◽

Bingyang Liu ◽

Xin Zhao ◽

Yang Liu ◽

...

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Crop Production ◽

Management Practice ◽

Meta Analysis ◽

Central China ◽

Mean Annual Precipitation ◽

Alkaline Soils ◽

Sequestration Rate

Crop residue returning (RR) is a promising option to increase soil organic carbon (SOC) storage, which is linked to crop yield promotion, ecologically sustainable agriculture, and climate change mitigation. Thus, the objectives of this study were to identify the responses of SOC storage and sequestration rates to RR in China’s croplands. Based on a national meta-analysis of 365 comparisons from 99 publications, the results indicated that RR increased SOC storage by 11.3% compared to residue removal (p < 0.05). Theoretically, when combined with low nitrogen fertilizer input rates (0–120 kg N ha−1), single cropping system, paddy-upland rotation, lower mean annual precipitation (0–500 mm), alkaline soils (pH 7.5–8.5), other methods of RR (including residue chopping, evenly incorporating, and burying) or long-term use (>10 yrs), an increase in SOC storage under RR by 11.6–15.5% could be obtained. The SOC sequestration rate of RR varied from 0.48 (Central China) to 1.61 (Southwest China) Mg C ha−1 yr−1, with a national average value of 0.93 Mg C ha−1 yr−1. Higher SOC sequestration rates enhanced crop production. However, decreases in SOC sequestration rate were observed with increases in experimental durations. The phenomenon of “C saturation” occurred after 23 yrs of RR. Overall, RR can be used as an efficient and environmentally friendly and climate-smart management practice for long-term use.

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