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The Soil Ecosystem02:23

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Related Experiment Video

Updated: May 23, 2026

Utilizing Soil Density Fractionation to Separate Distinct Soil Carbon Pools
09:19

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Published on: December 16, 2022

Fertilization increases paddy soil organic carbon density.

Shao-xian Wang1, Xin-qiang Liang, Qi-xiang Luo

  • 1Institute of Environmental Science and Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, China.

Journal of Zhejiang University. Science. B
|April 3, 2012
PubMed
Summary

Balanced fertilization, especially combining organic amendments with inorganic fertilizers, significantly boosts soil organic carbon (SOC) sequestration in paddy soils. This sustainable practice enhances carbon storage in agricultural lands.

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Area of Science:

  • Agricultural Science
  • Soil Science
  • Environmental Science

Background:

  • Soil organic carbon (SOC) sequestration is crucial for soil health and climate change mitigation.
  • Long-term field experiments are vital for understanding the impacts of agricultural practices on SOC.
  • Paddy soils in subtropical regions represent significant carbon sinks.

Purpose of the Study:

  • To evaluate the effects of different fertilization strategies on soil organic carbon (SOC) sequestration.
  • To compare the efficacy of inorganic fertilizers versus combined organic and inorganic amendments.
  • To identify optimal fertilization practices for enhancing carbon storage in subtropical paddy soils.

Main Methods:

  • A 25-year field experiment in subtropical China with eight fertilization treatments was analyzed.
  • Soil samples were collected to measure soil organic carbon (SOC) content and density.
  • Statistical analysis was performed to correlate fertilization treatments with SOC sequestration.

Main Results:

  • All fertilization treatments increased SOC content compared to the unfertilized check.
  • Treatments combining inorganic fertilizers and organic amendments showed higher SOC densities than inorganic-only treatments.
  • SOC density (73.12–91.36 Mg/ha) was positively correlated with organic amendments and rice residue inputs.

Conclusions:

  • Balanced and combined fertilization effectively promotes carbon sequestration in paddy soils.
  • Integrating organic amendments with inorganic fertilizers is a sustainable and effective strategy for increasing SOC.
  • Optimized fertilization practices can enhance the role of agricultural soils in carbon sequestration.