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Chinese Journal of Applied Ecology ›› 2021, Vol. 32 ›› Issue (9): 3079-3088.doi: 10.13287/j.1001-9332.202109.027

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Effects of nitrogen deposition and biochar application on soil N2O fluxes in a Moso bamboo plantation

HUANG Kai-ping1, LI Yong-fu1,2*, SONG Cheng-fang1, QU Tian-hua1, LIU Bo3, LUO Hai-yan3, LI Yong-chun1, CAI Yan-jiang1   

  1. 1State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an 311300, Zhejiang, China;
    2Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang A&F University, Lin'an 311300, Zhejiang, China;
    3Agricultural and Rural Bureau of Lin'an District, Lin'an 311300, Zhejiang, China
  • Received:2021-01-27 Accepted:2021-06-22 Online:2021-09-15 Published:2022-03-15
  • Contact: * E-mail: yongfuli@zafu.edu.cn
  • Supported by:
    National Natural Science Foundation of China (31870576) and Natural Science Foundation for Distinguished Young Scholar of Zhejiang Province (LR18C160001).

Abstract: In July 2019-July 2020, we conducted a field trial to examine the effects of nitrogen addition (60 kg N·hm-2·a-1), biochar application (10 t·hm-2), and their combination on soil N2O emission and the relationship between soil N2O emission and environmental factors in a typical Moso bamboo (Phyllostachys edulis) plantation in Hangzhou City of Zhejiang Province. Soil N2O flux of Moso bamboo plantation was measured by the static chamber-gas chromatography technique. The results showed that nitrogen addition treatment increased the annual cumulative N2O emission by 14.6%, while biochar application and the combination treatment reduced it by 20.8% and 10.6%, respectively. Soil N2O flux rate was significantly correlated with soil temperature, NO3--N concentration, urease and protease activities, and soil NH4+-N concentration across all treatments. In conclusion, under the background of nitrogen deposition, the application of biochar would have a significant reduction effect on soil N2O fluxes in Moso bamboo plantations.

Key words: Moso bamboo plantation, N2O, biochar, nitrogen deposition, nitrogen form