Loading...
Please wait, while we are loading the content...
Similar Documents
Effects of Nitrogen Additions on Soil Respiration in an Asian Tropical Montane Rainforest
| Content Provider | MDPI |
|---|---|
| Author | Wu, Fangtao Peng, Changhui Liu, Weiguo Liu, Zhihao Wang, Hui Chen, Dexiang Li, Yide |
| Copyright Year | 2021 |
| Description | Understanding the impacts of nitrogen (N) addition on soil respiration $(R_{S}$) and its temperature sensitivity $(Q_{10}$) in tropical forests is very important for the global carbon cycle in a changing environment. Here, we investigated how $R_{S}$ respond to N addition in a tropical montane rainforest in Southern China. Four levels of N treatments (0, 25, 50, and 100 kg N $ha^{−1}$ $a^{−1}$ as control (CK), low N (N25), moderate N (N50), and high N (N100), respectively) were established in September 2010. Based on a static chamber-gas chromatography method, $R_{S}$ was measured from January 2015 to December 2018. $R_{S}$ exhibited significant seasonal variability, with low $R_{S}$ rates appeared in the dry season and high rates appeared in the wet season regardless of treatment. $R_{S}$ was significantly related to the measured soil temperature and moisture. Our results showed that soil $R_{S}$ increased after N additions, the mean annual $R_{S}$ was 7% higher in N25 plots, 8% higher in N50 plots, and 11% higher in N100 plots than that in the CK plots. However, the overall impacts of N additions on $R_{S}$ were statistically insignificant. For the entire study period, the CK, N25, N50, and N100 treatments yielded $Q_{10}$ values of 2.27, 3.45, 4.11, and 2.94, respectively. N addition increased the temperature sensitivity $(Q_{10}$) of $R_{S}$. Our results suggest that increasing atmospheric N deposition may have a large impact on the stimulation of soil $CO_{2}$ emissions from tropical rainforests in China. |
| Starting Page | 802 |
| e-ISSN | 19994907 |
| DOI | 10.3390/f12060802 |
| Journal | Forests |
| Issue Number | 6 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-06-18 |
| Access Restriction | Open |
| Subject Keyword | Forests Water Science and Technology Nitrogen Addition Soil Respiration Temperature Sensitivity Tropical Forest |
| Content Type | Text |
| Resource Type | Article |
