No effect of warming and watering on soil nitrous oxide fluxes in a temperate sitka spruce forest ecosystem

IF 2.6 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Integrative Environmental Sciences Pub Date : 2020-10-08 DOI:10.1080/1943815X.2020.1823421

Junliang Zou, B. Osborne

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引用次数: 1

Abstract

ABSTRACT Soil fluxes of nitrous oxide (N2O) play an important role in the global greenhouse gas budget. However, the response of soil N2O emissions to climate change in temperate forest plantations is not yet well understood. In this study, we assessed the responses of soil N2O fluxes to experimental warming with or without water addition, using a replicated in situ heating (~2°C above ambient) and water addition (170 mm) experiment in a temperate Sitka spruce plantation forest over the period 2014–2016. We found that seasonal fluxes of N2O during the year were highly variable, ranging from net uptake to net emissions. Seasonal variations in soil N2O fluxes were not correlated with either soil temperature or soil moisture. In addition, none of the individual warming/watering treatments, or their interactions, had significant effects on soil N2O fluxes and N-related soil properties. Overall, our results suggest that despite future increases in temperature, soil N2O emission may remain largely unchanged in many temperate forest ecosystems that are often N-limited.

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增温和浇水对温带锡特卡云杉林生态系统土壤氧化亚氮通量的影响

一氧化二氮(N2O)的土壤通量在全球温室气体收支中起着重要作用。然而，温带人工林土壤N2O排放对气候变化的响应尚不清楚。在这项研究中，我们利用2014-2016年在温带锡特卡云杉人工林中重复的原地加热(比环境高~2°C)和加水(170 mm)实验，评估了土壤N2O通量对加水或不加水的实验增温的响应。我们发现，一年中N2O的季节通量变化很大，从净吸收到净排放不等。土壤N2O通量的季节变化与土壤温度和土壤湿度均无相关性。此外，各个增温/浇水处理及其相互作用对土壤N2O通量和n相关土壤性质均无显著影响。总体而言，我们的研究结果表明，尽管未来温度升高，但在许多通常n有限的温带森林生态系统中，土壤N2O排放可能基本保持不变。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Integrative Environmental Sciences ENVIRONMENTAL SCIENCES-

CiteScore

3.90

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Integrative Environmental Sciences (JIES) provides a stimulating, informative and critical forum for intellectual debate on significant environmental issues. It brings together perspectives from a wide range of disciplines and methodologies in both the social and natural sciences in an effort to develop integrative knowledge about the processes responsible for environmental change. The Journal is especially concerned with the relationships between science, society and policy and one of its key aims is to advance understanding of the theory and practice of sustainable development.