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- Title
Contrasting effects of long-term acid rain simulation on temperature sensitivity of soil respiration and enzymatic activities in a subtropical forest.
- Authors
Chen, Shutao; Sun, Lu; Zhang, Xu; Shen, Xiaoshuai; Liu, Yifan; Ren, Jingquan
- Abstract
Purpose: The purpose of this study was to investigate the long-term effects of acid rain simulation (ARS) on soil respiration (Rs) components and enzymatic activities. Materials and methods: An 8-year field ARS experiment was conducted in a subtropical forest. A trenching method was used to partition Rs into heterotrophic respiration (Rh) and autotrophic respiration (Ra). Soil urease, invertase, and catalase activities were measured after long-term ARS application. Results and discussion: The repeated-measures ANOVA indicated that there was no significant (P > 0.05) difference in annual mean Rs (or Rh) between SAR plots from March 2016 to February 2018. Rs was significantly (P < 0.001) higher than Rh for each specific ARS treatment across the 2 years. There were no significant (P > 0.05) differences in Q10 of Rs (or Rh) between ARS treatments, indicating that the ARS effect on Q10 was not significant. ARS induced a decline in soil urease activity in both untrenched and trenched plots on most measurement dates. The soil invertase and catalase activities were significantly (P < 0.05) reduced by ARS manipulation but had temporal variations. Long-term ARS did not significantly change Rs in the untrenched plots or Rh in the trenched plots in this subtropical forest ecosystem. Conclusions: Compared with soil respiration, which is a process involving more biological groups, soil enzymes were more vulnerable to the long-term ARS.
- Subjects
SOIL respiration; ACID rain; HETEROTROPHIC respiration; SOIL temperature; CONTRAST effect; FOREST soils
- Publication
Journal of Soils & Sediments: Protection, Risk Assessment, & Remediation, 2020, Vol 20, Issue 1, p412
- ISSN
1439-0108
- Publication type
Article
- DOI
10.1007/s11368-019-02385-5