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应用生态学报 ›› 2021, Vol. 32 ›› Issue (9): 3079-3088.doi: 10.13287/j.1001-9332.202109.027

• 研究论文 • 上一篇    下一篇

氮沉降和施生物质炭对毛竹林土壤N2O通量的影响

黄凯平1, 李永夫1,2*, 宋成芳1, 屈田华1, 刘波3, 罗海燕3, 李永春1, 蔡延江1   

  1. 11浙江农林大学亚热带森林培育国家重点实验室, 浙江临安 311300;
    2浙江农林大学浙江省森林生态系统碳循环与固碳减排重点实验室, 浙江临安 311300;
    3浙江省杭州市临安区农业农村局, 浙江临安 311300
  • 收稿日期:2021-01-27 接受日期:2021-06-22 出版日期:2021-09-15 发布日期:2022-03-15
  • 通讯作者: * E-mail: yongfuli@zafu.edu.cn
  • 作者简介:黄凯平, 女, 1995年生, 硕士研究生。主要从事森林土壤碳、氮循环与全球变化的研究。E-mail: huangkaipingzafu@163.com
  • 基金资助:
    国家自然科学基金项目(31870576)和浙江省杰出青年科学基金项目(LR18C160001)资助

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).

摘要: 本研究于2019年7月—2020年7月在浙江省杭州市典型毛竹林布置野外控制实验,采用静态箱-气相色谱法测定毛竹林土壤N2O通量,分析生物质炭(10 t·hm-2)、氮沉降(60 kg N·hm-2·a-1)、生物质炭+氮沉降混合处理对土壤N2O通量的影响,并探讨了土壤N2O通量与环境因子的关系。结果表明: 与对照相比,氮沉降处理使毛竹林土壤N2O年累积排放量增加了14.6%,而施用生物质炭及其与氮沉降混合处理则分别降低了20.8%和10.6%。相关分析表明,在所有处理下,毛竹林土壤N2O排放速率与土壤温度、硝态氮含量、脲酶和蛋白酶活性之间均呈极显著相关,与土壤铵态氮含量均呈显著相关。在氮沉降背景下,施用生物质炭对毛竹林土壤N2O通量仍具有显著的减排效应。

关键词: 毛竹林, 氧化亚氮, 生物质炭, 氮沉降, 氮组分

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