Root production, mortality and turnover in soil profiles as affected by clipping in a temperate grassland on the Loess Plateau
文献类型：期刊论文
| 作者 | Wei, Lin2; Yao, Pengwei1; Jing, Guanghua3; Ye, Xiefeng1; Cheng, Jimin3 |
| 刊名 | JOURNAL OF PLANT ECOLOGY
 |
| 出版日期 | 2019-12-01 |
| 卷号 | 12期号:6页码:1059-1072 |
| 关键词 | clipping root dynamics vertical root distribution seasonal variation in root growth temperate grassland |
| ISSN号 | 1752-9921 |
| DOI | 10.1093/jpe/rtz039 |
| 通讯作者 | Ye, Xiefeng(yexiefeng@163.com) ; Cheng, Jimin(gyzcjm@ms.iswc.ac.cn) |
| 英文摘要 | Aims Clipping or mowing for hay, as a prevalent land-use practice, is considered to be an important component of global change. Root production and turnover in response to clipping have great implications for the plant survival strategy and grassland ecosystem carbon processes. However, our knowledge about the clipping effect on root dynamics is mainly based on root living biomass, and limited by the lack of spatial and temporal observations. The study aim was to investigate the effect of clipping on seasonal variations in root length production and mortality and their distribution patterns in different soil layers in semiarid grassland on the Loess Plateau. Methods Clipping was performed once a year in June to mimic the local spring livestock grazing beginning from 2014. The minirhizotron technique was used to monitor the root production, mortality and turnover rate at various soil depths (0-10, 10-20, 20-30 and 30-50 cm) in 2014 (from 30 May to 29 October) and 2015 (from 22 April to 25 October). Soil temperature and moisture in different soil layers were also measured during the study period. Important Findings Our results showed that: (i) Clipping significantly decreased the cumulative root production (P < 0.05) and increased the cumulative root mortality and turnover rates of the 0-50 cm soil profile for both years. (ii) Clipping induced an immediate and sharp decrease in root length production and an increase in root length mortality in all soil layers. However, with plant regrowth, root production increased and root mortality decreased gradually, with the root production at a depth of 30-50 cm even exceeding the control in September-October 2014 and April-May 2015. (iii) Clipping mainly reduced root length production and increased root length mortality in the upper 0-20 cm soil profile with rapid root turnover. However, roots at deeper soil layers were either little influenced by clipping or exhibited an opposite trend with slower turnover rate compared with the upper soil profile, leading to the downward transport of root production and living root biomass. These findings indicate that roots in deeper soil layers tend to favour higher root biomass and longer fine root life spans to maximize the water absorption efficiency under environmental stress, and also suggest that short-term clipping would reduce the amount of carbon through fine root litter into the soil, especially in the shallow soil profile. |
| WOS关键词 | NET PRIMARY PRODUCTIVITY ; INNER-MONGOLIA ; NITROGEN ; RESPONSES ; DYNAMICS ; RESPIRATION ; BIOMASS ; GROWTH ; ALLOCATION ; CARBON |
| 资助项目 | 'Mechanisms of grassland degradation and integrative demonstration of their ecological restoration technology in the agro-pastoral transitional zone of the northern China' of the National Key Research and Development Program of China[2016YFC0500700] ; 'Spatial scale effect of land use impact on runoff in the Loess Plateau under climate change' of the National Natural Science Foundation of China[41230852] ; 'Strategic Priority Research Program-Climate Change: Carbon Budget and Related Issues' of the Chinese Academy of Sciences[XDA05050202] |
| WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology ; Forestry |
| 语种 | 英语 |
| WOS记录号 | WOS:000503278500013 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | 'Mechanisms of grassland degradation and integrative demonstration of their ecological restoration technology in the agro-pastoral transitional zone of the northern China' of the National Key Research and Development Program of China ; 'Spatial scale effect of land use impact on runoff in the Loess Plateau under climate change' of the National Natural Science Foundation of China ; 'Strategic Priority Research Program-Climate Change: Carbon Budget and Related Issues' of the Chinese Academy of Sciences |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/131168]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Ye, Xiefeng; Cheng, Jimin |
| 作者单位 | 1.Henan Agr Univ, Dept Tobacco Sci, Coll Tobacco Sci, Zhengzhou 450002, Henan, Peoples R China 2.Henan Agr Univ, Dept Environm, Coll Forestry, Zhengzhou 450002, Henan, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wei, Lin,Yao, Pengwei,Jing, Guanghua,et al. Root production, mortality and turnover in soil profiles as affected by clipping in a temperate grassland on the Loess Plateau[J]. JOURNAL OF PLANT ECOLOGY,2019,12(6):1059-1072. |
| APA | Wei, Lin,Yao, Pengwei,Jing, Guanghua,Ye, Xiefeng,&Cheng, Jimin.(2019).Root production, mortality and turnover in soil profiles as affected by clipping in a temperate grassland on the Loess Plateau.JOURNAL OF PLANT ECOLOGY,12(6),1059-1072. |
| MLA | Wei, Lin,et al."Root production, mortality and turnover in soil profiles as affected by clipping in a temperate grassland on the Loess Plateau".JOURNAL OF PLANT ECOLOGY 12.6(2019):1059-1072. |
入库方式： OAI收割
来源：地理科学与资源研究所
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