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Environmental Science and Pollution Research

, Volume 26, Issue 4, pp 4070–4077 | Cite as

Effects of biochar and dicyandiamide combination on nitrous oxide emissions from Camellia oleifera field soil

  • Bang-Liang Deng
  • Shu-Li Wang
  • Xin-Tong Xu
  • Hua Wang
  • Dong-Nan Hu
  • Xiao-Min Guo
  • Qing-Hua Shi
  • Evan Siemann
  • Ling ZhangEmail author
Research Article
  • 120 Downloads

Abstract

Greenhouse gas emissions from agricultural soils contribute substantially to global atmospheric composition. Nitrous oxide (N2O) is one important greenhouse gas induces global warming. Nitrification inhibitors (NI) or biochar can be effective soil N2O emission mitigation strategies for agricultural soils. However, due to differences in crop physiological traits or agricultural management, the effectiveness of mitigation strategies varies among agricultural systems. Camellia oleifera is a woody oil plant widely grown and requires intensive N input, which will potentially increase N2O emissions. Thereby, mitigation of N2O emissions from C. oleifera field soil is vital for sustainable C. oleifera development. Besides NI, incorporation of C. oleifera fruit shell-derived biochar into its soil will benefit waste management and simultaneous mitigation of N2O emissions but this has not been investigated. Here, we conducted two studies to examine effects of biochar addition and NI (dicyandiamide, DCD) application on N2O emissions from C. oleifera field soil with different N (urea or NH4NO3) and incubation temperatures. Biochar effects on nitrification rates varied among N treatments. Biochar applied in combination with DCD further reduced nitrification rates (for urea treatment, decreased from 1.1 to 0.3 mg kg−1 day−1). Biochar addition consistently increased soil N2O emissions (for urea treatment, increased from 0.03 to 0.08 ng g−1 h−1) and their temperature sensitivity. DCD application reduced soil N2O emissions with greater reductions with urea application. In future cultivation of intensively managed C. oleifera gardens, NI should be applied to mitigate N2O emissions if biochar is added, especially when urea is used.

Keywords

Biochar application Nitrous oxide Nitrification inhibitors Nitrogen mineralization Camellia oleifera Nitrification Warming 

Notes

Funding information

This work was financially supported by the National Natural Science Foundation of China (41501317), National Science and Technology Research Projects (2012BAD14B14-4), China and Jiangxi Postdoctoral Science Foundation (2017M612153, 2017KY18), and Key Science and Technology Project of Jiangxi Education Department (GJJ160348).

Supplementary material

11356_2018_3900_MOESM1_ESM.docx (538 kb)
ESM 1 (DOCX 538 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Ministry of Education and Jiangxi Key Laboratory of Crop Physiology, Ecology and Genetic BreedingJiangxi Agricultural UniversityNanchangChina
  2. 2.College of Land Resources and EnvironmentJiangxi Agricultural UniversityNanchangChina
  3. 3.Department of BiosciencesRice UniversityHoustonUSA

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