Responses of soil hydrolytic enzymes, ammonia-oxidizing bacteria and archaea to nitrogen applications in a temperate grassland in Inner Mongolia
文献类型：SCI/SSCI论文
| 作者 | Zhang X. Y.; Tang, Y. Q.; Shi, Y.; He, N. P.; Wen, X. F.; Yu, Q.; Zheng, C. Y.; Sun, X. M.; Qiu, W. W.; Yang Y.
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| 发表日期 | 2016 |
| 关键词 | semiarid grassland northern china microbial responses diversity abundance water fertilization deposition community ecosystem |
| 英文摘要 | We used a seven-year urea gradient applied field experiment to investigate the effects of nitrogen (N) applications on soil N hydrolytic enzyme activity and ammonia-oxidizing microbial abundance in a typical steppe ecosystem in Inner Mongolia. The results showed that N additions inhibited the soil N-related hydrolytic enzyme activities, especially in 392 kg N ha(-1) yr(-1) treatment. As N additions increased, the amoA gene copy ratios of ammonia-oxidizing archaea (AOA) to ammonia-oxidizing bacteria (AOB) decreased from 1.13 to 0.65. Pearson correlation analysis showed that the AOA gene copies were negatively related with NH4+-N content. However, the AOB gene copies were positively correlated with NO3--N content. Moderate N application rates (56-224 kg N ha(-1) yr(-1)) accompanied by P additions are beneficial to maintaining the abundance of AOB, as opposed to the inhibition of highest N application rate (392 kg N ha(-1) yr(-1)) on the abundance of AOB. This study suggests that the abundance of AOB and AOA would not decrease unless N applications exceed 224 kg N ha(-1) yr(-1) in temperate grasslands in Inner Mongolia. |
| 出处 | Scientific Reports |
| 卷 | 6 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 2045-2322 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/43357]  |
| 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 | Zhang X. Y.,Tang, Y. Q.,Shi, Y.,et al. Responses of soil hydrolytic enzymes, ammonia-oxidizing bacteria and archaea to nitrogen applications in a temperate grassland in Inner Mongolia. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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