Nitrogen acquisition by plants and microorganisms in a temperate grassland
文献类型：SCI/SSCI论文
| 作者 | Liu Q. Y.; Qiao, N.; Xu, X. L.; Xin, X. P.; Han, J. Y.; Tian, Y. Q.; Ouyang, H.; Kuzyakov, Y. |
| 发表日期 | 2016 |
| 关键词 | soil-microorganisms inorganic nitrogen organic-nitrogen inner-mongolia amino-acids competition microbes diversity nutrients ammonium |
| 英文摘要 | Nitrogen (N) limitation is common in most terrestrial ecosystems, often leading to strong competition between microorganisms and plants. The mechanisms of niche differentiation to reduce this competition remain unclear. Short-term N-15 experiments with NH4+, NO3-, and glycine were conducted in July, August and September in a temperate grassland to evaluate the chemical, spatial and temporal niche differentiation by competition between plants and microorganisms for N. Microorganisms preferred NH4+ and NO3-, while plants preferred NO3-. Both plants and microorganisms acquired more N in August and September than in July. The soil depth had no significant effects on microbial uptake, but significantly affected plant N uptake. Plants acquired 67% of their N from the 0-5 cm soil layer and 33% from the 5-15 cm layer. The amount of N taken up by microorganisms was at least seven times than plants. Although microorganisms efficiently compete for N with plants, the competition is alleviated through chemical partitioning mainly in deeper soil layer. In the upper soil layer, neither chemical nor temporal niche separation is realized leading to strong competition between plants and microorganisms that modifies N dynamics in grasslands. |
| 出处 | Scientific Reports |
| 卷 | 6 |
| 语种 | 英语 |
| ISSN号 | 2045-2322 |
| DOI标识 | 10.1038/srep22642 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/42752]  |
| 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 | Liu Q. Y.,Qiao, N.,Xu, X. L.,et al. Nitrogen acquisition by plants and microorganisms in a temperate grassland. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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