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Agricultural industry

Ditch-Buried Straw Return Technique Enhances Soil Carbon and Crop Yield in Paddy Systems

Strategic Insights

— 1 min read

Researchers at Nanjing Agricultural University in China have proposed a new technique for soil conservation and crop yield improvement in paddy systems. The ditch-buried straw return technique involves injecting straw into the subsoil, which can increase soil organic carbon and crop grain production. According to the study, this technique has shown promising results in a 15-year experiment, with a 15% increase in grain yield and a 46% increase in soil organic carbon stocks at a depth of 0-40 cm. The technique has also been found to decrease net CO2 equivalent emissions by 34% and increase net economic benefits by 18%.

Key Takeaways:

  • The ditch-buried straw return technique involves injecting straw into the subsoil to enhance soil carbon and crop yield in paddy systems.
  • A 15-year experiment has shown a 15% increase in grain yield and a 46% increase in soil organic carbon stocks at a depth of 0-40 cm.
  • The technique has also been found to decrease net CO2 equivalent emissions by 34% and increase net economic benefits by 18%.
  • The study was funded by the Key National R&D Program of China, National Key R&D Program of China, Natural Science Foundation of Jiangsu Province, Chinese Academy of Sciences President's International Fellowship Initiative, and German Research Foundation (DFG).
  • Additional authors for this research include Zheng-Rong Kan, Zhenzhen Li, Xinmin Bian, Haishui Yang, Wulf Amelung, Roland Bol, Hai-Lin Zhang, Rattan Lal, Jian Liu, and Yaguang Xue.

Statistics:

  • 15% increase in grain yield under ditch-buried straw return compared to rotary-tillage straw return management.
  • 46% increase in soil organic carbon stocks at a depth of 0-40 cm under ditch-buried straw return.
  • 34% decrease in net CO2 equivalent emissions under ditch-buried straw return.
  • 18% increase in net economic benefits under ditch-buried straw return.
  • 15-year experiment duration for the ditch-buried straw return technique.

Sources:

  • "Soil Carbon Accrual and Crop Production Enhanced By Sustainable Subsoil Management" published in Nature Geoscience (2025).
  • Zheng-Rong Kan et al., "Enhancement of Soil Organic Carbon and Crop Yield under Ditch-Buried Straw Return in Paddy Systems" (2025) published in Nature Geoscience.
  • NewsRx LLC, "New Sustainability Research Study Results Reported from Nanjing Agricultural University" (2025).

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