Differential responses of short-term soil respiration dynamics to the experimental addition of nitrogen and water in the temperate semi-arid steppe of Inner Mongolia, China
文献类型：SCI/SSCI论文
| 作者 | Peng Q. |
| 发表日期 | 2014 |
| 关键词 | soil respiration short-term response N addition simulated rainfall temperate steppe precipitation pulses co2 flux california grassland microbial biomass northern china forest soils elevated co2 carbon fertilization deposition |
| 英文摘要 | We examined the effects of simulated rainfall and increasing N supply of different levels on CO2 pulse emission from typical Inner Mongolian steppe soil using the static opaque chamber technique, respectively in a dry June and a rainy August. The treatments included NH4NO3 additions at rates of 0, 5, 10, and 20 g N/(m(2)center dot year) with or without water. Immediately after the experimental simulated rainfall events, the CO2 effluxes in the watering plots without N addition (WCK) increased greatly and reached the maximum value at 2 hr. However, the efflux level reverted to the background level within 48 hr. The cumulative CO2 effluxes in the soil ranged from 5.60 to 6.49 g C/m(2) over 48 hr after a single water application, thus showing an increase of approximately 148.64% and 48.36% in the effluxes during both observation periods. By contrast, the addition of different N levels without water addition did not result in a significant change in soil respiration in the short term. Two-way ANOVA showed that the effects of the interaction between water and N addition were insignificant in short-term soil CO2 effluxes in the soil. The cumulative soil CO2 fluxes of different treatments over 48 hr accounted for approximately 5.34% to 6.91% and 2.36% to 2.93% of annual C emission in both experimental periods. These results stress the need for improving the sampling frequency after rainfall in future studies to ensure more accurate evaluation of the grassland C emission contribution. |
| 出处 | Journal of Environmental Sciences-China |
| 卷 | 26 |
| 期 | 4 |
| 页 | 834-845 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1001-0742 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/29649]  |
| 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 | Peng Q.. Differential responses of short-term soil respiration dynamics to the experimental addition of nitrogen and water in the temperate semi-arid steppe of Inner Mongolia, China. 2014. |
入库方式： OAI收割
来源：地理科学与资源研究所
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