自然资源学报 ›› 2019, Vol. 34 ›› Issue (12): 2529-2543.doi: 10.31497/zrzyxb.20191204

• 湿地专栏 • 上一篇    下一篇

生物炭对滨海湿地盐碱土壤碳氮循环的影响

张倩1(), 刘冰洁1, 余璐2, 王瑞瑞1, 郑浩1(), 罗先香1, 李锋民1   

  1. 1. 中国海洋大学,近海环境污染控制研究所,海洋环境与生态教育部重点实验室,青岛 266100
    2. 北京师范大学环境学院,北京师范大学水环境模拟国家重点实验室,北京 100875
  • 收稿日期:2019-08-09 修回日期:2019-10-24 出版日期:2019-12-28 发布日期:2019-12-28
  • 作者简介:

    作者简介:张倩(1994- ),女,山西临汾人,硕士,研究方向为土壤污染控制与修复。E-mail: start2633264901@163.com

  • 基金资助:
    山东省重点研发计划—重大科技创新工程(2018CXGC0304);国家自然科学基金项目(41573089)

Effects of biochar amendment on carbon and nitrogen cycling in coastal saline soils: A review

ZHANG Qian1(), LIU Bing-jie1, YU Lu2, WANG Rui-rui1, ZHENG Hao1(), LUO Xian-xiang1, LI Feng-min1   

  1. 1. Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, Shandong, China
    2. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
  • Received:2019-08-09 Revised:2019-10-24 Online:2019-12-28 Published:2019-12-28

摘要:

滨海湿地盐碱土壤在全球碳氮循环及调节气候变化中起着重要作用。环境友好型土壤改良剂生物炭(Biochar,BC)在缓解气候变化和促进农业可持续发展方面前景巨大。然而,现有研究多关注BC对滨海湿地盐碱土壤中温室气体排放及土壤氮素流失的影响,缺乏其对滨海湿地盐碱土壤碳氮循环的深入研究和系统总结。本文综合分析了施用BC对滨海湿地盐碱土壤植被碳库、有机碳库、有机碳矿化及生物固氮、硝化、反硝化、矿化、氨损失等碳氮循环过程的影响和可能机制。指出未来应关注长期野外研究,利用宏基因组等现代分子生物技术,阐明BC对土壤碳氮循环影响的分子生物学机制,以期为滨海湿地生态系统的修复与功能保育提供理论依据。

关键词: 滨海湿地, 盐碱土壤, 碳封存, 土壤退化, 矿化, 氮循环

Abstract:

Coastal saline-alkaline soil plays important roles in global carbon and nitrogen cycling and climate change regulation. Biochar (BC), as an eco-friendly soil amendment, shows a promising prospect in terms of alleviating climate change and promoting sustainable agricultural development. However, most of the previous studies focused on the influence of BC application on greenhouse gas emissions and nitrogen availability and loss in coastal saline-alkaline soil, but little information that comprehensively summarized the effect of BC on the soil carbon and nitrogen cycling is available. As a result, the objective of this review is to comprehensively summarize that: (1) The influences of BC on soil carbon pools (vegetation and soil organic carbon) and soil organic carbon mineralization in the coastal saline-alkaline soil; (2) The influences of BC on nitrogen cycling, including biological nitrogen fixation, nitrification, denitrification, nitrogen mineralization, and ammonia volatilization; (3) The underlying mechanisms responsible for the BC-regulated carbon and nitrogen cycling in the soil. At last, we also point out that more efforts should be paid to the investigation of long-term experiments in field circumstances in future, and the explanation of the microbial mechanisms underlying soil carbon and nitrogen cycling affected by BC application using modern molecular biotechnology (e.g., metagenomics). This review would provide useful information for maintaining health and function of the coastal soil ecosystem by incorporation of BC.

Key words: coastal wetland, saline-alkaline soil, carbon sequestration, soil degradation, mineralization, nitrogen cycling