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Root production, mortality and turnover in soil profiles as affected by clipping in a temperate grassland on the Loess Plateau
Wei, Lin1; Yao, Pengwei2; Jing, Guanghua3; Ye, Xiefeng2; Cheng, Jimin3
2019-12-01
Source PublicationJOURNAL OF PLANT ECOLOGY
ISSN1752-9921
Volume12Issue:6Pages:1059-1072
Corresponding AuthorYe, Xiefeng(yexiefeng@163.com) ; Cheng, Jimin(gyzcjm@ms.iswc.ac.cn)
AbstractAims 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.
Keywordclipping root dynamics vertical root distribution seasonal variation in root growth temperate grassland
DOI10.1093/jpe/rtz039
WOS KeywordNET PRIMARY PRODUCTIVITY ; INNER-MONGOLIA ; NITROGEN ; RESPONSES ; DYNAMICS ; RESPIRATION ; BIOMASS ; GROWTH ; ALLOCATION ; CARBON
Indexed BySCI
Language英语
Funding Project'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]
Funding Organization'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
WOS Research AreaPlant Sciences ; Environmental Sciences & Ecology ; Forestry
WOS SubjectPlant Sciences ; Ecology ; Forestry
WOS IDWOS:000503278500013
PublisherOXFORD UNIV PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/131169
Collection中国科学院地理科学与资源研究所
Corresponding AuthorYe, Xiefeng; Cheng, Jimin
Affiliation1.Henan Agr Univ, Dept Environm, Coll Forestry, Zhengzhou 450002, Henan, Peoples R China
2.Henan Agr Univ, Dept Tobacco Sci, Coll Tobacco Sci, Zhengzhou 450002, Henan, Peoples R China
3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
Recommended Citation
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.
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