Shrub encroachment increases soil carbon and nitrogen stocks in temperate grasslands in China
文献类型：期刊论文
| 作者 | Li, He3; Shen, Haihua2; Zhou, Luhong; Zhu, Yankun2; Chen, Leiyi; Hu, Huifeng; Zhang, Pujin; Fang, Jingyun4,5
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| 刊名 | LAND DEGRADATION & DEVELOPMENT
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| 出版日期 | 2019 |
| 卷号 | 30期号:7页码:756-767 |
| 关键词 | deep soils land cover change shrub encroachment soil organic carbon soil total nitrogen |
| ISSN号 | 1085-3278 |
| DOI | 10.1002/ldr.3259 |
| 文献子类 | Article |
| 英文摘要 | Shrub encroachment has significant impacts on carbon (C) and nitrogen (N) dynamics of grassland ecosystems, but, how it influences soil organic C (SOC) and soil total N (STN) stocks of grasslands is not well documented, especially in deep soils. Here, we examined these effects by investigating the SOC density (SOCD) and the STN density (STND) at depths of up to 5m in shrub patches and grassy matrix at 18 grassland sites in Inner Mongolia, China. Our results revealed that 44.0-54.1% of SOC and 65.5-74.8% of STN were stored in soil layers of 100cm to 500cm, and that shrub encroachment resulted in a significant accumulation of SOC and STN in shrub patches. The mean SOCD at 0-500cm soil layers in shrub patches and grassy matrix was 11.34 and 8.39kgCm(-2), respectively, and the mean STND was 2.45 and 2.13kgNm(-2), respectively. These differences between the shrub patches and grassy matrix were equivalent to an increase in the mean SOC and STN stocks of 2.95kgCm(-2) and 0.32kgNm(-2), respectively. Increases in SOCD and STND mainly occurred in 30-300cm soil layers, and varied between typical grassland and desert grassland. The changes in SOCD and STND exhibited significant negative correlations with temperature and pH and positive correlations with precipitation and plant biomass. Our findings suggest that shrub encroachment can significantly accumulate SOC and STN in deep soils in temperate grasslands, which helps to understand soil C and N dynamics in shrub-encroached grasslands. |
| 学科主题 | Environmental Sciences ; Soil Science |
| 出版地 | HOBOKEN |
| 电子版国际标准刊号 | 1099-145X |
| WOS关键词 | WOODY PLANT ENCROACHMENT ; INNER MONGOLIAN GRASSLANDS ; LAND-USE CHANGE ; ORGANIC-CARBON ; TEMPORAL DYNAMICS ; BULK-DENSITY ; ECOSYSTEM ; DEEP ; CLIMATE ; IMPACTS |
| WOS研究方向 | Environmental Sciences & Ecology ; Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000465039700004 |
| 出版者 | WILEY |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31330012, 31470525, 41807319] ; National Basic Research Program of China on Global ChangeNational Basic Research Program of China [2014CB954001] ; Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-SMC011] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/19686]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Jiangsu Normal Univ, Sch Geog Geomat & Planning, Xuzhou 221116, Jiangsu, Peoples R China 3.Peking Univ, Minist Educ, Key Lab Earth Surface Proc, Beijing 100871, Peoples R China 4.Peking Univ, Dept Ecol, Coll Urban & Environm, Minist Educ, Beijing 100871, 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 | Li, He,Shen, Haihua,Zhou, Luhong,et al. Shrub encroachment increases soil carbon and nitrogen stocks in temperate grasslands in China[J]. LAND DEGRADATION & DEVELOPMENT,2019,30(7):756-767. |
| APA | Li, He.,Shen, Haihua.,Zhou, Luhong.,Zhu, Yankun.,Chen, Leiyi.,...&Fang, Jingyun.(2019).Shrub encroachment increases soil carbon and nitrogen stocks in temperate grasslands in China.LAND DEGRADATION & DEVELOPMENT,30(7),756-767. |
| MLA | Li, He,et al."Shrub encroachment increases soil carbon and nitrogen stocks in temperate grasslands in China".LAND DEGRADATION & DEVELOPMENT 30.7(2019):756-767. |
入库方式： OAI收割
来源：植物研究所
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