The retention dynamics of N input within the soil-microbe-plant system in a temperate grassland
文献类型：期刊论文
| 作者 | Ma, Linna; Gao, Xiuli5; Liu, Guofang; Xu, Xiaofeng3; Lu, Xiaotao2; Xin, Xiaoping1; Lu, Yixia5; Zhang, Chaoxue5; Zhang, Lihua; Wang, Renzhong5 |
| 刊名 | GEODERMA
 |
| 出版日期 | 2020 |
| 卷号 | 368 |
| ISSN号 | 0016-7061 |
| 关键词 | N deposition N-15 N Retention Non-growing season Temperate grassland |
| DOI | 10.1016/j.geoderma.2020.114290 |
| 文献子类 | Article |
| 英文摘要 | In N-limited temperate regions, atmospheric N deposition remains high over the non-growing season. However, the retention dynamics of non-growing season N input within the ecosystem remain unclear. Using an isotopic approach, we investigated the initial retention and subsequent dynamics of N-15 (1.5 g N-15 m(-2)) in the soils, microbes, plants, and litter over three years in grazing-prohibited (PG) and heavily grazed treatments (HG) in northern China. For initial retention (21 days after( 15)N addition), most N-15 was immobilized in soils and microbes, while less was taken up by plants. Soil and microbial N-15 immobilization were significantly higher when grazing was prohibited, although plant 15 Nacquisition was not affected by grazing. After initial retention, rapid N-15 loss was observed in microbes and soils, while N-15 levels were sustained longer in plants and litter. The N-15 residence times were longer when grazing was prohibited. The 15 Nacquisition capacity varies among plant taxa: perennial grasses and forbs accumulated N-15 rapidly, while sagebrush and legumes acted slowly. Although the added N-15 had significant contribution to early spring N demands of soil microbes and plants, it did not increase microbial or plant biomass N. Our results showed that non-growing season exogenous N was primarily retained by soil biota in temperate grasslands in the early stage, but N retention is finally sustained in soil and plants. The findings highlighted the importance of soil microbes in sustaining N upon N input, inferring the needs for considering the microbial role for better understanding N cycling in the temperate grasslands. |
| 学科主题 | Soil Science |
| 电子版国际标准刊号 | 1872-6259 |
| 出版地 | AMSTERDAM |
| WOS关键词 | NITROGEN UPTAKE ; ORGANIC-MATTER ; INNER-MONGOLIA ; INCREASED PRECIPITATION ; ARCTIC TUNDRA ; CARBON ; DEPOSITION ; BIOMASS ; WINTER ; PERIOD |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000524458400021 |
| 资助机构 | National Key Research and Development Program of China [2016YFC0500501] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31770527] ; Chinese Academy of Agriculture Sciences ; Hulunber Grassland Ecosystem Observation and Research Station ; San Diego State University |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/21826]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Erguna Forest Steppe Ecotone Res Stn, Shenyang 110016, Peoples R China 2.San Diego State Univ, Biol Dept, San Diego, CA 92182 USA 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China 5.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Linna,Gao, Xiuli,Liu, Guofang,et al. The retention dynamics of N input within the soil-microbe-plant system in a temperate grassland[J]. GEODERMA,2020,368. |
| APA | Ma, Linna.,Gao, Xiuli.,Liu, Guofang.,Xu, Xiaofeng.,Lu, Xiaotao.,...&Wang, Renzhong.(2020).The retention dynamics of N input within the soil-microbe-plant system in a temperate grassland.GEODERMA,368. |
| MLA | Ma, Linna,et al."The retention dynamics of N input within the soil-microbe-plant system in a temperate grassland".GEODERMA 368(2020). |
入库方式： OAI收割
来源：植物研究所
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