Effects of short-and long-term nutrient addition on microbial carbon use efficiency and carbon accumulation efficiency in the Tibetan alpine grassland
文献类型：期刊论文
| 作者 | Ma Tian1,2 ; Gao Wenjing2; Shi Biwan2; Yang Zhiying2; Li Yifan2; Zhu Jianxiao2; He Jin-Sheng2
|
| 刊名 | Soil & Tillage Research
 |
| 出版日期 | 2023-02 |
| 卷号 | 229页码:1-12 |
| 关键词 | Microbial extracellular enzyme activity Microbial carbon use efficiency Microbial carbon accumulation efficiency N and P addition |
| DOI | 10.1016/j.still.2023.105657 |
| 英文摘要 | Microbial activities and physiological performances can directly affect the use and sequestration of organic carbon (C) in soil. Microbial carbon use efficiency (CUE) and carbon accumulation efficiency (CAE) are critical parameters hypothesized to control C transformation and sequestration in terrestrial ecosystem, and may be influenced by nutrient availability. However, knowledge regarding the influence of short- and long-term nutrient addition on microbial CUE and CAE is lacking, particularly in microbial CAE. This study aimed to investigate the effects of nutrient addition on microbial CUE and CAE and the underlying mechanisms. Here, based on a long term nutrient addition field experiment on the Qinghai-Tibetan Plateau (QTP), we conducted an incubation experiment with and without the 13C-labeled glucose approach to assess microbial CUE and CAE in the top- (0–10 cm) and subsoil (20–30 cm) collected in the second (short-term) versus tenth (long-term) fertilized year. According to the microbial economic theory, short-term nitrogen (N) addition suppressed oxidase activities in the topsoil, whereas long-term nutrient addition significantly changed hydrolase activities. Furthermore, the short and long-term nutrient additions had no significant effect on microbial CUE, which may be attributed to the fact that the slightly increased content of C allocated to microbial biomass production was not sufficient to significantly change the CUE. Microbial CAE only increased with 10-year of continuous N addition, which was mainly due to increasing N availability. We found that the C-acquisition enzymes and clay content dominantly regulated microbial CUE, whereas N availability played an important role in regulating CAE. In conclusion, our results elucidated the differential responses of microbial CUE and CAE to N and phosphorus (P) addition, providing empirical evidence for understanding microbially governed C and their feedback to nutrient interactions in the context of increasing anthropogenic N and P input. |
| 语种 | 英语 |
| 源URL | [http://ir.yic.ac.cn/handle/133337/40077]  |
| 专题 | 中国科学院烟台海岸带研究所 烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室 |
| 作者单位 | 1.Observation and Research Station on Eco-Environment of Frozen Ground in the Qilian Mountains, Lanzhou University, Lanzhou 730020, China 2.State Key Laboratory of Grassland and Agro-ecosystems, and College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China |
| 推荐引用方式 GB/T 7714 | Ma Tian,Gao Wenjing,Shi Biwan,et al. Effects of short-and long-term nutrient addition on microbial carbon use efficiency and carbon accumulation efficiency in the Tibetan alpine grassland[J]. Soil & Tillage Research,2023,229:1-12. |
| APA | Ma Tian.,Gao Wenjing.,Shi Biwan.,Yang Zhiying.,Li Yifan.,...&He Jin-Sheng.(2023).Effects of short-and long-term nutrient addition on microbial carbon use efficiency and carbon accumulation efficiency in the Tibetan alpine grassland.Soil & Tillage Research,229,1-12. |
| MLA | Ma Tian,et al."Effects of short-and long-term nutrient addition on microbial carbon use efficiency and carbon accumulation efficiency in the Tibetan alpine grassland".Soil & Tillage Research 229(2023):1-12. |
入库方式： OAI收割
来源：烟台海岸带研究所
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