scholarly journals Combined Fertilization Could Increase Crop Productivity and Reduce Greenhouse Gas Intensity through Carbon Sequestration under Rice-Wheat Rotation

Agronomy ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2540
Author(s):  
Tengfei Guo ◽  
Haoan Luan ◽  
Dali Song ◽  
Shuiqing Zhang ◽  
Wei Zhou ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Soil Carbon ◽  
Greenhouse Gas ◽  
Wheat Yield ◽  
Cropping System ◽  
C Sequestration ◽  
Crop Productivity ◽  
Soil Carbon Sequestration ◽  
Rotation System ◽  
Greenhouse Gas Intensity

Quantifying greenhouse gas intensity (GHGI) and soil carbon sequestration is a method to assess the mitigation potential of agricultural activities. However, the effects of different fertilizer amendments on soil carbon sequestration and net GHGI in a rice-wheat cropping system are poorly understood. Here, fertilizer treatments including PK (P and K fertilizers); NPK (N, P and K fertilizers), NPK + OM (NPK plus manure), NPK + SR (NPK plus straw returning), and NPK + CR (NPK plus controlled-release fertilizer) with equal N input were conducted to gain insight into the change of soil organic carbon (SOC) derived from the net ecosystem carbon budget (NECB), net global warming potential (GWP), and GHGI under rice-wheat rotation. Results showed that compared with NPK treatment, NPK + OM significantly increased wheat yield and NPK + SR caused significant increase in rice yield. Meanwhile, NPK + SR and NPK + CR treatments reduced net GWP by 30.80% and 21.83%, GHGI by 36.84% and 28.07%, respectively, which suggested that improved grain production could be achieved without sacrificing the environment. With the greatest C sequestration, lowest GHGI, the NPK plus straw returning practices (NPK + SR) might be the best strategy to mitigate net GWP and improve grain yield and NUE in the current rice-wheat rotation system.

Rice–wheat cropping system: tillage, mulch, and nitrogen effects on soil carbon sequestration and crop productivity

2015 ◽  
Vol 15 (4) ◽  
pp. 699-710 ◽  
Author(s):  
Keshav R. Adhikari ◽  
Khem R. Dahal ◽  
Zueng-Sang Chen ◽  
Yih-Chi Tan ◽  
Jihn-Sung Lai
Keyword(s):  
Carbon Sequestration ◽  
Soil Carbon ◽  
Cropping System ◽  
Crop Productivity ◽  
Soil Carbon Sequestration

scholarly journals Water-saving ground cover rice production system reduces net greenhouse gas fluxes in an annual rice-based cropping system

2014 ◽  
Vol 11 (6) ◽  
pp. 8925-8967 ◽  
Author(s):  
Z. Yao ◽  
Y. Du ◽  
Y. Tao ◽  
X. Zheng ◽  
C. Liu ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Soil Carbon ◽  
Greenhouse Gas ◽  
Production System ◽  
Cropping System ◽  
Ground Cover ◽  
Water Saving ◽  
Soil Carbon Sequestration ◽  
Chicken Manure ◽  
Ch4 And N2o

Abstract. To safeguard food security and preserve precious water resources, the technology of water-saving ground cover rice production system (GCRPS) is being increasingly adopted for the rice cultivation. However, changes in soil water status and temperature under GCRPS may affect soil biogeochemical processes that control the biosphere–atmosphere exchanges of methane (CH4), nitrous oxide (N2O) and carbon dioxide (CO2). The overall goal of this study is to better understand how net ecosystem greenhouse gas exchanges (NEGE) and grain yields are affected by GCRPS in an annual rice-based cropping system. Our evaluation was based on measurements of the CH4 and N2O fluxes and soil heterotrophic respiration (CO2 emission) over a complete year, as well as the estimated soil carbon sequestration intensity for six different fertilizer treatments for conventional paddy and GCRPS. The fertilizer treatments included urea application and no N fertilization for both conventional paddy (CUN and CNN) and GCRPS (GUN and GNN), solely chicken manure (GCM) and combined urea and chicken manure applications (GUM) for GCRPS. Averaging across all the fertilizer treatments, GCRPS increased annual N2O emission and grain yield by 40% and 9%, respectively, and decreased annual CH4 emission by 69%, while GCRPS did not affect soil CO2 emissions relative to the conventional paddy. The annual direct emission factors of N2O were 4.01, 0.087 and 0.50% for GUN, GCM and GUM, respectively, and 1.52% for the conventional paddy (CUN). The annual soil carbon sequestration intensity under GCRPS was estimated to be an average of −1.33 Mg C ha−1 yr−1, which is approximately 44% higher than the conventional paddy. The annual NEGE were 10.80–11.02 Mg CO2-eq ha−1 yr−1 for the conventional paddy and 3.05–9.37 Mg CO2-eq ha−1 yr−1 for the GCRPS, suggesting the potential feasibility of GCRPS in reducing net greenhouse effect from rice cultivation. Using organic fertilizers for GCRPS considerably reduced annual emissions of CH4 and N2O and increased soil carbon sequestration, resulting in the lowest NEGE (3.05–5.00 Mg CO2-eq ha−1 yr−1). Accordingly, water-saving GCRPS with organic fertilizer amendments was considered the most promising management regime for simultaneously achieving relatively high grain yield and reduced net greenhouse gas emission.

scholarly journals Water-saving ground cover rice production system reduces net greenhouse gas fluxes in an annual rice-based cropping system

2014 ◽  
Vol 11 (22) ◽  
pp. 6221-6236 ◽  
Author(s):  
Z. Yao ◽  
Y. Du ◽  
Y. Tao ◽  
X. Zheng ◽  
C. Liu ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Soil Carbon ◽  
Greenhouse Gas ◽  
Production System ◽  
Cropping System ◽  
Ground Cover ◽  
Water Saving ◽  
Soil Carbon Sequestration ◽  
Chicken Manure ◽  
Ch4 And N2o

Abstract. To safeguard food security and preserve precious water resources, the technology of water-saving ground cover rice production system (GCRPS) is being increasingly adopted for rice cultivation. However, changes in soil water status and temperature under GCRPS may affect soil biogeochemical processes that control the biosphere–atmosphere exchanges of methane (CH4), nitrous oxide (N2O) and carbon dioxide (CO2). The overall goal of this study is to better understand how net ecosystem greenhouse gas exchanges (NEGE) and grain yields are affected by GCRPS in an annual rice-based cropping system. Our evaluation was based on measurements of the CH4 and N2O fluxes and soil heterotrophic respiration (CO2 emissions) over a complete year, and the estimated soil carbon sequestration intensity for six different fertilizer treatments for conventional paddy and GCRPS. The fertilizer treatments included urea application and no N fertilization for both conventional paddy (CUN and CNN) and GCRPS (GUN and GNN), and solely chicken manure (GCM) and combined urea and chicken manure applications (GUM) for GCRPS. Averaging across all the fertilizer treatments, GCRPS increased annual N2O emission and grain yield by 40 and 9%, respectively, and decreased annual CH4 emission by 69%, while GCRPS did not affect soil CO2 emissions relative to the conventional paddy. The annual direct emission factors of N2O were 4.01, 0.09 and 0.50% for GUN, GCM and GUM, respectively, and 1.52% for the conventional paddy (CUN). The annual soil carbon sequestration intensity under GCRPS was estimated to be an average of −1.33 Mg C ha−1 yr−1, which is approximately 44% higher than the conventional paddy. The annual NEGE were 10.80–11.02 Mg CO2-eq ha−1 yr−1 for the conventional paddy and 3.05–9.37 Mg CO2-eq ha−1 yr−1 for the GCRPS, suggesting the potential feasibility of GCRPS in reducing net greenhouse effects from rice cultivation. Using organic fertilizers for GCRPS considerably reduced annual emissions of CH4 and N2O and increased soil carbon sequestration, resulting in the lowest NEGE (3.05–5.00 Mg CO2-eq ha−1 yr−1). Accordingly, water-saving GCRPS with organic fertilizer amendments was considered the most promising management regime for simultaneously achieving relatively high grain yield and reduced net greenhouse gas emission.

scholarly journals Effects of Wetland Restoration and Conservation Projects on Soil Carbon Sequestration in the Ningxia Basin of the Yellow River in China from 2000 to 2015

2020 ◽  
Vol 12 (24) ◽  
pp. 10284
Author(s):  
Xiaoyan Bu ◽  
Dan Cui ◽  
Suocheng Dong ◽  
Wenbao Mi ◽  
Yu Li ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Soil Carbon ◽  
Wetland Restoration ◽  
Yellow River ◽  
C Sequestration ◽  
Soil Carbon Sequestration ◽  
The Yellow River ◽  
Wetland Soil ◽  
Landsat 8 ◽  
Conservation Projects

The long-term use of wetlands stresses wetland ecosystems and leads to degradation and C loss. This study explored an optimal remote sensing-multivariate linear regression model (RS-MLRM) for estimating wetland soil organic carbon (SOC) by using a combination of the measured SOC and above ground biomass (AGB) from 273 samples, textural features, spectral information, and a vegetation index calculated from Landsat-8 images using the Ningxia Basin of the Yellow River as the study area. To derive the optimal predictor model for SOC, these variables were regressed against the measured SOC. These were used to predict SOC and evaluate the contribution of wetland restoration and conservation projects to soil carbon sequestration and sinks on the Ningxia Basin of the Yellow River in early (2000 and 2005), intermediate (2010), and recent (2015) years. The results show that from 2000 to 2015, the project-induced contribution to C sequestration was 20.49 TC, with an annual sink of 1.37 TC. This accounted for 54.06% of the total wetland ecosystem C sequestration on the Ningxia Basin of the Yellow River. Moreover, there was a significant success of restoration and conservation projects regarding C sequestration. These restoration and conservation projects have substantially contributed to CO2 mitigation in the arid area.

scholarly journals Tillage, Nitrogen, and Cropping System Effects on Soil Carbon Sequestration

2002 ◽  
Vol 66 (3) ◽  
pp. 906-912 ◽  
Author(s):  
Ardell D. Halvorson ◽  
Brian J. Wienhold ◽  
Alfred L. Black
Keyword(s):  
Carbon Sequestration ◽  
Soil Carbon ◽  
Cropping System ◽  
Soil Carbon Sequestration
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