Nitrogen deposition may increase litter accumulative CO2 release in a subtropical estuarine marsh

文献类型： 外文期刊

第一作者： Hu, Weifang

作者： Hu, Weifang;Li, Guoliang;Hu, Weifang;Zeng, Congsheng;Tong, Chuan;Zhou, Jiacong;Zhang, Meiying;Chen, Yuehmin;Zhang, Linhai;Hu, Weifang;Zeng, Congsheng;Tong, Chuan;Zhou, Jiacong;Zhang, Meiying;Chen, Yuehmin;Zhang, Linhai;Lan, Xue;Zhang, Linhai

作者机构：

关键词： litter-derived CO2; litter decomposition; nitrogen addition; estuarine marsh; accumulative CO2 release

期刊名称：FRONTIERS IN MARINE SCIENCE （ 影响因子：5.247； 五年影响因子：5.72 ）

ISSN：

年卷期： 2022 年 9 卷

页码：

收录情况： SCI

摘要： Microbial evolution-mediated CO2 from litter has aroused widespread concern, and knowing the factors controlling litter-derived CO2 is important when considering the effects of accumulative CO2 release from litter on the global greenhouse. We conducted a short-term N addition (6, 16, and 24 g N m(-2) yr(-1)) experiment in Cyperus malaccensis var. brevifolius (shichito matgrass) litter decomosition. Phospholipid fatty acid (PLFA) method and enzyme method were used to analysis litter microbial community composition and enzymatic activity. During a 220-day decomposition period, there was little effect of the N amendments on litter CO2 evolution rates (9.97-307.54 mu g C g(-1) h(-1)) with a notable exception regarding the increase of the high-N treatment at day 20. The accumulative CO2 release significantly increased after N addition in the medium and late phases. The facilitation effect on accumulative CO2 release by N amendments was more and more obvious over the decomposition time, especially for the low- and intermediate-N treatments. At the end of our experiment, compared with the control treatment, accumulative CO2 release increased 69.75%, 76.62%, and 39.93% for low-, intermediate-, and high-N treatments, respectively. These observations highlight that N deposition could cause high losses of litter C as CO2.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序