scholarly journals Long-term organic farming on a citrus plantation results in soil organic carbon recovery

2019 ◽  
Vol 45 (1) ◽  
pp. 271 ◽  
Author(s):  
A. Novara ◽  
M. Pulido ◽  
J. Rodrigo-Comino ◽  
S. Di Prima ◽  
P. Smith ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Organic Farming ◽  
Cover Crops ◽  
Organic Management ◽  
Soil C ◽  
Soil Organic Carbon Sequestration ◽  
Sequestration Rate ◽  
Mediterranean Conditions

It has been shown that soil management under organic farming can enhance soil organic carbon, thereby mitigating atmospheric greenhouse gas increases, but until now quantitative evaluations based on long term experiments are scarce, especially under Mediterranean conditions. Changes in soil organic carbon (SOC) content were examined in response to organic management with cover crops in a Mediterranean citrus plantation using 21 years of survey data. Soil organic carbon increase was more apparent 5 years after a land management change suggesting that, for citrus plantations on Mediterranean conditions, studies should be longer than five years in duration. Soil organic carbon sequestration rate did not significantly change during the 21 years of observation, with values ranging from -1.10 Mg C ha-1 y-1 to 1.89 Mg C ha-1 y-1. After 21 years, 61 Mg CO2 ha-1 were sequestered in long-lived soil C pools. These findings demonstrate that organic management is an effective strategy to restore or increase SOC content in Mediterranean citrus systems.

Influence of vegetable cultivation methods on soil organic carbon sequestration rate

2012 ◽  
Vol 32 (9) ◽  
pp. 2953-2959
Author(s):  
刘杨 LIU Yang ◽  
于东升 YU Dongsheng ◽  
史学正 SHI Xuezheng ◽  
张广星 ZHANG Guangxing ◽  
秦发侣 QIN Falü
Keyword(s):  
Carbon Sequestration ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Organic Carbon Sequestration ◽  
Sequestration Rate ◽  
Organic Carbon Sequestration ◽  
Cultivation Methods ◽  
Carbon Sequestration Rate ◽  
Vegetable Cultivation

scholarly journals Long-term effect of tillage, nitrogen fertilization and cover crops on soil organic carbon and total nitrogen content

2011 ◽  
Vol 114 (2) ◽  
pp. 165-174 ◽  
Author(s):  
Marco Mazzoncini ◽  
Tek Bahadur Sapkota ◽  
Paolo Bàrberi ◽  
Daniele Antichi ◽  
Rosalba Risaliti
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Nitrogen Content ◽  
Total Nitrogen ◽  
Cover Crops ◽  
Nitrogen Fertilization ◽  
Term Effect ◽  
Total Nitrogen Content ◽  
Long Term Effect

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

Agronomy ◽  
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.

Improving modelling estimations of soil organic carbon sequestration in manure-amended croplands

2021 ◽  
Author(s):  
Francis Durnin-Vermette ◽  
Paul Voroney ◽  
Adam Gillespie
Keyword(s):  
Carbon Sequestration ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Greenhouse Gas ◽  
Greenhouse Gas Emission ◽  
Coefficient Of Determination ◽  
Manure Application ◽  
Soil Organic Carbon Sequestration ◽  
Organic Carbon Sequestration

&lt;p&gt;Carbon sequestration reduces GHG emissions while improving soil fertility. In order for carbon sequestration through agriculture to be viable, however, accurate estimations of sequestration values are crucial in order to guide policy-making. Currently, Ontario&amp;#8217;s provincial Ministry of Agriculture, Food and Rural Affairs (OMAFRA) uses sequestration values from the federal government&amp;#8217;s farm-level greenhouse gas emission model (Holos), however these estimates fall short in one respect: a 2018 analysis demonstrated that manure application is not completely considered in the government&amp;#8217;s estimates, which is a critical gap.&lt;/p&gt; &lt;p&gt;The main purposes of our study were 1) to assess the accuracy of soil organic carbon estimations of process-based soil carbon models (Century and RothC) which were calibrated with data from long-term manure addition experiments in Ontario, and 2) to modify these models such that they were able to fully take manure application into account when estimating carbon sequestration in Ontario&amp;#8217;s croplands, and determine whether this substantially increases model accuracy.&lt;/p&gt; &lt;p&gt;The models&amp;#8217; estimations for soil organic carbon sequestration were respectively calibrated and validated using data from two long-term manure addition experiments in Ottawa and Harrow. By calibrating multiple models using multiple datasets, model-specific and site-specific biases were minimized. The statistical analyses consisted of a suite of tests that assess the modelling accuracy compared to baseline measured data: the coefficient of determination (R2), root mean square error (RMSE), average relative error (ARE), and the Nash-Sutcliffe efficiency statistic (NSE).&lt;/p&gt; &lt;p&gt;As a result of these improved provincial estimates, Canadians will be better-informed about the greenhouse gas mitigation potential of long-term manure addition to croplands, which will help guide decisions made by policymakers as well as farmers. These improved provincial estimates will also be reported to Canada&amp;#8217;s national greenhouse gas inventory, and will be ultimately disclosed to the UN&amp;#8217;s Intergovernmental Panel on Climate Change (IPCC) in their global GHG summary report.&lt;/p&gt;

scholarly journals Differential long-term effects of climate change and management on stocks and distribution of soil organic carbon in productive grasslands

2012 ◽  
Vol 9 (1) ◽  
pp. 1055-1096 ◽  
Author(s):  
A. M. G. De Bruijn ◽  
P. Calanca ◽  
C. Ammann ◽  
J. Fuhrer
Keyword(s):  
Climate Change ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Climate Change Scenarios ◽  
Long Term Effects ◽  
Organic C ◽  
Soil C ◽  
The Impact ◽  
Soc Stocks

Abstract. We studied the impact of climate change on the dynamics of soil organic carbon (SOC) stocks in productive grassland systems undergoing two types of management, an intensive type with frequent harvests and fertilizer applications and an extensive system where fertilization is omitted and harvests are fewer. The Oensingen Grassland Model was explicitly developed for this study. It was calibrated using measurements taken in a recently established permanent sward in Central Switzerland, and run to simulate SOC dynamics over 2001–2100 under three climate change scenarios assuming different elements of IPCC A2 emission scenarios. We found that: (1) management intensity dominates SOC until approximately 20 yr after grassland establishment. Differences in SOC between climate scenarios become significant after 20 yr and climate effects dominate SOC dynamics from approximately 50 yr after establishment, (2) carbon supplied through manure contributes about 60% to measured organic C increase in fertilized grassland. (3) Soil C accumulates particularly in the top 10 cm soil until 5 yr after establishment. In the long-term, C accumulation takes place in the top 15 cm of the soil profile, while C content decreases below this depth. The transitional depth between gains and losses of C mainly depends on the vertical distribution of root senescence and root biomass. We discuss the importance of previous land use on carbon sequestration potentials that are much lower at the Oensingen site under ley-arable rotation and with much higher SOC stocks than most soils under arable crops. We further discuss the importance of biomass senescence rates, because C balance estimations indicate that these may differ considerably between the two management systems.

Sign in / Sign up

Export Citation Format

Share Document