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Divergent responses of soil buffering capacity to long-term N deposition in three typical tropical forests with different land-use history.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lu, Xiankai Mao, Qinggong Mo, Jiangming Gilliam, Frank S. Zhou, Guoyi Luo, Yuting Zhang, Wenjun Huang, Juan |
| Copyright Year | 2015 |
| Abstract | Elevated anthropogenic nitrogen (N) deposition has become an important driver of soil acidification at both regional and global scales. It remains unclear, however, how long-term N deposition affects soil buffering capacity in tropical forest ecosystems and in ecosystems of contrasting land-use history. Here, we expand on a long-term N deposition experiment in three tropical forests that vary in land-use history (primary, secondary, and planted forests) in Southern China, with N addition as NH4NO3 of 0, 50, 100, and 150 kg N ha(-1) yr(-1), respectively. Results showed that all three forests were acid-sensitive ecosystems with poor soil buffering capacity, while the primary forest had higher base saturation and cation exchange capacity than others. However, long-term N addition significantly accelerated soil acidification and decreased soil buffering capacity in the primary forest, but not in the degraded secondary and planted forests. We suggest that ecosystem N status, influenced by different land-use history, is primarily responsible for these divergent responses. N-rich primary forests may be more sensitive to external N inputs than others with low N status, and should be given more attention under global changes in the future, because lack of nutrient cations is irreversible. |
| Starting Page | 302 |
| Ending Page | 303 |
| Page Count | 2 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://ecolab.ou.edu//download.php?pub_id=442 |
| PubMed reference number | 25741588v1 |
| Alternate Webpage(s) | https://doi.org/10.1021/es5047233 |
| DOI | 10.1021/es5047233 |
| Journal | Environmental science & technology |
| Volume Number | 49 |
| Issue Number | 7 |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Cations Ecosystem Forests Nitrogen Nutrient Canals Tropical Spastic Paraparesis |
| Content Type | Text |
| Resource Type | Article |
