Optimizing Crop Production for Carbon Neutrality in China: A New Study

Strategic Insights -

Research from the Renmin University of China has shed light on the strategic importance of crop production for food security and climate change mitigation in China. The study, published in the Frontiers of Agricultural Science and Engineering, highlights the need to optimize crop production in China toward carbon-neutral agriculture. The researchers found that cropland-based greenhouse gas emissions increased at a rate of 4.3 Tg·yr-1 CO2-eq from 1990 to 2015, but decreased by 11.6 Tg·yr-1 CO2-eq between 2015 and 2021. The study also notes that soil carbon in Chinese cropland has a high sequestration potential, with topsoil carbon containing 5.5 Pg of soil organic carbon and 2.4 Pg of soil inorganic carbon.

Key Takeaways:

  • Crop production is strategic for food security and climate change mitigation in China, and can provide a temporary soil carbon sink.
  • Cropland-based greenhouse gas emissions increased at a rate of 4.3 Tg·yr-1 CO2-eq from 1990 to 2015, but decreased by 11.6 Tg·yr-1 CO2-eq between 2015 and 2021.
  • Soil carbon in Chinese cropland has a high sequestration potential, with topsoil carbon containing 5.5 Pg of soil organic carbon and 2.4 Pg of soil inorganic carbon.
  • Reliable management practices, such as fertilizer application, irrigation, and tillage, can have positive effects on emission intensity of crop production.
  • The path to achieving carbon neutrality in China's cropland is still uncertain and requires further quantitative assessment.

Statistics:

  • 4.3 Tg·yr-1 CO2-eq: rate at which cropland-based greenhouse gas emissions increased from 1990 to 2015
  • 11.6 Tg·yr-1 CO2-eq: rate at which cropland-based greenhouse gas emissions decreased between 2015 and 2021
  • 5.5 Pg: amount of soil organic carbon in topsoil carbon
  • 2.4 Pg: amount of soil inorganic carbon in topsoil carbon
  • 55%: percentage of N2O emissions
  • 44%: percentage of CH4 emissions
  • 5.7%: percentage of simultaneous cropland GHG emissions offset by soil C sequestration

Sources:

  • "Optimizing crop production toward agricultural carbon neutrality in China." Frontiers of Agricultural Science and Engineering, 2025,12(3):596-610. (Frontiers of Agricultural Science and Engineering - http://engineering.cae.cn/fase)
  • NewsRx. Reports from Renmin University of China Advance Knowledge in Agricultural Science (Optimizing crop production toward agricultural carbon neutrality in China). China Weekly News. September 2, 2025; p 371.