Influence of nitrogen fertilization on soil ammonia oxidizer and denitrifier abundance, microbial biomass, and enzyme activities in an alpine meadow
文献类型：SCI/SSCI论文
| 作者 | Tian X. F. ; Hu H. W. ; Ding Q. ; Song M. H. ; Xu X. L. ; Zheng Y. ; Guo L. D. |
| 发表日期 | 2014 |
| 关键词 | Ammonia-oxidizing microorganism Denitrifying bacteria Nitrogen deposition Quantitative PCR Soil enzyme activity Soil microbial biomass long-term fertilization forest soils organic-matter community structure bacteria archaea responses nitrification cycle deposition |
| 英文摘要 | Terrestrial ecosystems are predicted to experience an increasing level of atmospheric nitrogen (N) deposition, which may cause significant shifts in plant community composition and concomitantly stimulate soil acidification. However, little is known concerning the effects of N deposition on belowground microbial communities in alpine grassland ecosystems such as on the Tibetan Plateau. This study examined the responses of soil N-transforming microbes (measured after DNA extraction and quantitative PCR), soil microbial biomass C (SMBC) and N (SMBN), and soil enzyme activities to different forms (NH4 (+)-N, NO3 (-)-N, and NH4NO3-N) and rates (1.5 and 7.5 g N m(-2) year(-1), denoted as low and high N, respectively) of N fertilization (addition) in two successive plant growing seasons. The N rate, not N form, influenced the abundance of ammonia-oxidizing archaea (AOA). High N addition significantly increased ammonia-oxidizing bacteria (AOB) abundance which differed across different N form treatments. Nitrogen addition had no significant impact on the abundance of soil denitrifiers. The SMBC and SMBN were significantly decreased by high N additions, but no difference was found among different N forms. Despite higher urease activities being detected in the late plant growing season, the activities of invertase and alkaline phosphomonoesterase stayed unchanged irrespective of the different N amendments and plant growing season. Significant positive correlations were found between potential nitrification rates and AOB abundances. These results highlight that AOB seemed to respond more sensitively to different N fertilization and might have prominent roles in soil N cycling processes in this Tibetan Plateau alpine meadow than AOA. |
| 出处 | Biology and Fertility of Soils |
| 卷 | 50 |
| 期 | 4 |
| 页 | 703-713 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0178-2762 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/29581]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Tian X. F.,Hu H. W.,Ding Q.,et al. Influence of nitrogen fertilization on soil ammonia oxidizer and denitrifier abundance, microbial biomass, and enzyme activities in an alpine meadow. 2014. |
入库方式： OAI收割
来源：地理科学与资源研究所
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