Scholarlink

Aims <p>Biogenic volatile organic compound (BVOC) emissions from leaf litter play an important role in forest carbon (C) cycles. This study investigated the combined effects of nitrogen (N) addition and leaf litter species on BVOC emissions and the relative contribution of C emissions in the form of BVOCs to CO<sub>2</sub> emissions.</p> Methods <p>An incubation experiment was conducted using two levels of N addition and two leaf litter species (<i>Schima superba</i> and <i>Cunninghamia lanceolata</i>). We measured BVOC and CO<sub>2</sub> emissions and litter chemical properties during litter decomposition.</p> Results <p>Total BVOC-C emitted from two leaf litter species accounted for 0.19%–0.47% of CO<sub>2</sub>-C emissions. N addition decreased the total BVOC emissions, but increased CO<sub>2</sub> emissions from the decomposition of both litter species. N addition increased total N and soluble sugar contents of leaf litter but reduced the starch content and C/N ratio. Following N addition, the fluxes of most BVOC types were positively correlated with starch and nonstructural carbohydrate contents of <i>S. superba</i> leaf litter and with the C/N ratio of <i>C. lanceolata</i> leaf litter. In addition, the total BVOC and CO<sub>2</sub> emissions from <i>S. superba</i> leaf litter were higher than those from <i>C. lanceolata</i>. Corresponding, <i>S. superba</i> leaf litter had higher N and soluble sugar contents but lower C/N ratio and starch content than <i>C. lanceolata</i> leaf litter.</p> Conclusion <p>N addition inhibited BVOC emissions and promoted CO<sub>2</sub> emissions during leaf litter decomposition. Leaf litter with a high labile substrate content is likely to release more BVOCs during the early-stage of litter decomposition.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Opposing response of biogenic volatile organic compound and CO2 emissions to nitrogen addition during decomposition of two litter species

  • 期刊论文

  • 发表日期：

    2025年1月20日

查看全文
  • Yulin Zhu,
  • Xuemei Liu,
  • Xinyue Luo,
  • Ting Wu,
  • Xiong Fang,
  • Zhigang Yi

摘要

Aims

Biogenic volatile organic compound (BVOC) emissions from leaf litter play an important role in forest carbon (C) cycles. This study investigated the combined effects of nitrogen (N) addition and leaf litter species on BVOC emissions and the relative contribution of C emissions in the form of BVOCs to CO2 emissions.

Methods

An incubation experiment was conducted using two levels of N addition and two leaf litter species (Schima superba and Cunninghamia lanceolata). We measured BVOC and CO2 emissions and litter chemical properties during litter decomposition.

Results

Total BVOC-C emitted from two leaf litter species accounted for 0.19%–0.47% of CO2-C emissions. N addition decreased the total BVOC emissions, but increased CO2 emissions from the decomposition of both litter species. N addition increased total N and soluble sugar contents of leaf litter but reduced the starch content and C/N ratio. Following N addition, the fluxes of most BVOC types were positively correlated with starch and nonstructural carbohydrate contents of S. superba leaf litter and with the C/N ratio of C. lanceolata leaf litter. In addition, the total BVOC and CO2 emissions from S. superba leaf litter were higher than those from C. lanceolata. Corresponding, S. superba leaf litter had higher N and soluble sugar contents but lower C/N ratio and starch content than C. lanceolata leaf litter.

Conclusion

N addition inhibited BVOC emissions and promoted CO2 emissions during leaf litter decomposition. Leaf litter with a high labile substrate content is likely to release more BVOCs during the early-stage of litter decomposition.