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篇目详细内容

【篇名】 Nitrogen addition inhibits total monoterpene emissions in subtropical forest floor of South China
【刊名】 Soil Ecology Letters
【刊名缩写】 Soil Ecology Letters
【ISSN】 2662-2289
【EISSN】 2662-2297
【DOI】 10.1007/s42832-020-0056-0
【出版社】
【出版年】 2021
【卷期】 3 卷1期
【页码】 63-72 页,共 10 页
【作者】 Xingran Huang; Lili Zheng; Pingping Guo; Zhigang Yi;
【关键词】 Biogenic volatile organic compounds|Dinghushan Biosphere Reserve|Forest floor|Little|monoterpene|Nitrogen deposition

【摘要】

• Effects of N addition on MT fluxes from forest floor were first investigated.

• N addition inhibited MT emissions from forest floors, while increased for litter.

• MT emissions from the PF floor was significantly higher than those from the BF floor.

Monoterpenes (MTs) play crucial roles not only in atmospheric chemistry and global climate change but also in soil processes and soil ecology. Elevated nitrogen (N) deposition can influence soil microbial community and litter decomposition, and consequently alters MT fluxes from forest floors and litter. Yet, the responses of soil and litter MT to increased N deposition remain poorly understood and the influences of N addition are sometimes contradictory. In the present study, static chambers were placed in masson pine forest (PF) and in monsoon evergreen broad-leaf forest (BF) at Dinghushan, subtropical China. The preconcentrator-GC–MS was used to analyze the effect of N addition on MT fluxes from the forest floors and litter. The results showed that under control treatment (without N addition), the total MT emission rates were 279.90±137.17 and 102.70±45.36 pmol m2 s1 in the PF and BF floors, respectively, with α-pinene being the largest MT species in the PF and limonene in the BF. α-pinene and β-pinene emission rates decreased significantly in both forest floors after N addition, whereas a diverse trend was found for limonene and camphene in the PF floor. Furthermore, some MT fluxes showed significant negative correlations with soil respiration and soil temperature. Litter was important in MT fluxes from forest floors and its emission rates were enhanced by N addition. Moreover, different MT response to elevated N was found between the forest floor and litter. This study indicated that the elevated N deposition in the future would inhibit the MT emissions from the subtropical forest floor.

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