Plant and Soil

, Volume 340, Issue 1, pp 383–396

Short-term simulated nitrogen deposition increases carbon sequestration in a Pleioblastus amarus plantation

  • Li-Hua Tu
  • Ting-Xing Hu
  • Jian Zhang
  • Ren-Hong Li
  • Hong-Zhong Dai
  • Shou-Hua Luo
Regular Article

DOI: 10.1007/s11104-010-0610-0

Cite this article as:
Tu, LH., Hu, TX., Zhang, J. et al. Plant Soil (2011) 340: 383. doi:10.1007/s11104-010-0610-0
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Abstract

In order to understand the influence of nitrogen (N) deposition on the key processes relevant to the carbon (C) balance in a bamboo plantation, a two-year field experiment involving the simulated deposition of N in a Pleioblastus amarus plantation was conducted in the rainy region of SW China. Four levels of N treatments: control (no N added), low-N (50 kg N ha−1 year−1), medium-N (150 kg N ha−1 year−1), and high-N (300 kg N ha−1 year−1) were set in the present study. The results showed that soil respiration followed a clear seasonal pattern, with the maximum rates in mid-summer and the minimum in late winter. The annual cumulative soil respiration was 585 ± 43 g CO2-C m−2 year−1 in the control plots. Simulated N deposition significantly increased the mean annual soil respiration rate, fine root biomass, soil microbial biomass C (MBC), and N concentration in fine roots and fresh leaf litter. Soil respirations exhibited a positive exponential relationship with soil temperature, and a linear relationship with MBC. The net primary production (NPP) ranged from 10.95 to 15.01 Mg C ha−1 year−1 and was higher than the annual soil respiration (5.85 to 7.62 Mg C ha−1 year−1) in all treatments. Simulated N deposition increased the net ecosystem production (NEP), and there was a significant difference between the control and high N treatment NEP, whereas, the difference of NEP among control, low-N, and medium-N was not significant. Results suggest that N controlled the primary production in this bamboo plantation ecosystem. Simulated N deposition increased the C sequestration of the P. amarus plantation ecosystem through increasing the plant C pool, though CO2 emission through soil respiration was also enhanced.

Keywords

Nitrogen depositionSoil respirationCarbon sequestrationNet ecosystem productionPleioblastus amarus plantation

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Li-Hua Tu
    • 1
  • Ting-Xing Hu
    • 1
  • Jian Zhang
    • 1
  • Ren-Hong Li
    • 2
  • Hong-Zhong Dai
    • 1
  • Shou-Hua Luo
    • 1
  1. 1.Key Laboratory of Forestry Ecological Engineering of Sichuan Province, College of ForestrySichuan Agricultural UniversityYa’anPeople’s Republic of China
  2. 2.Sichuan Forestry Inventory and Plan InstituteChengduChina