Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13850 |
Carbon input by roots into the soil: Quantification of rhizodeposition from root to ecosystem scale | |
Pausch, Johanna1,2; Kuzyakov, Yakov2,3,4 | |
2018 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:1页码:1-12 |
文章类型 | Review |
语种 | 英语 |
国家 | Germany; Russia |
英文摘要 | Despite its fundamental role for carbon (C) and nutrient cycling, rhizodeposition remains 'the hidden half of the hidden half': it is highly dynamic and rhizodeposits are rapidly incorporated into microorganisms, soil organic matter, and decomposed to CO2. Therefore, rhizodeposition is rarely quantified and remains the most uncertain part of the soil C cycle and of C fluxes in terrestrial ecosystems. This review synthesizes and generalizes the literature on C inputs by rhizodeposition under crops and grasslands (281 data sets). The allocation dynamics of assimilated C (after C-13-CO2 or C-14-CO2 labeling of plants) were quantified within shoots, shoot respiration, roots, net rhizodeposition (i.e., C remaining in soil for longer periods), root-derived CO2, and microorganisms. Partitioning of C pools and fluxes were used to extrapolate below-ground C inputs via rhizodeposition to ecosystem level. Allocation from shoots to roots reaches a maximum within the first day after C assimilation. Annual crops retained more C (45% of assimilated C-13 or C-14) in shoots than grasses (34%), mainly perennials, and allocated 1.5 times less C belowground. For crops, belowground C allocation was maximal during the first 1-2 months of growth and decreased very fast thereafter. For grasses, it peaked after 2-4 months and remained very high within the second year causing much longer allocation periods. Despite higher belowground C allocation by grasses (33%) than crops (21%), its distribution between various belowground pools remains very similar. Hence, the total C allocated belowground depends on the plant species, but its further fate is species independent. This review demonstrates that C partitioning can be used in various approaches, e.g., root sampling, CO2 flux measurements, to assess rhizodeposits' pools and fluxes at pot, plot, field and ecosystem scale and so, to close the most uncertain gap of the terrestrial C cycle. |
英文关键词 | belowground carbon allocation carbon cycle crops grasses isotopic approaches rhizosphere microorganisms root exudation soil CO2 efflux trees |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426506100032 |
WOS关键词 | MICROBIAL COMMUNITY STRUCTURE ; ELEVATED ATMOSPHERIC CO2 ; BELOW-GROUND CARBON ; RHIZOSPHERE C-FLOW ; LOLIUM-PERENNE ; ORGANIC-MATTER ; FLUXNET MEASUREMENTS ; PLANT ; ALLOCATION ; DYNAMICS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17492 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Bayreuth, Dept Agroecol, Bayreuth, Germany; 2.Georg August Univ, Dept Soil Sci Temp Ecosyst, Gottingen, Germany; 3.Georg August Univ, Dept Agr Soil Sci, Gottingen, Germany; 4.Kazan Fed Univ, Inst Environm Sci, Kazan, Russia |
推荐引用方式 GB/T 7714 | Pausch, Johanna,Kuzyakov, Yakov. Carbon input by roots into the soil: Quantification of rhizodeposition from root to ecosystem scale[J]. GLOBAL CHANGE BIOLOGY,2018,24(1):1-12. |
APA | Pausch, Johanna,&Kuzyakov, Yakov.(2018).Carbon input by roots into the soil: Quantification of rhizodeposition from root to ecosystem scale.GLOBAL CHANGE BIOLOGY,24(1),1-12. |
MLA | Pausch, Johanna,et al."Carbon input by roots into the soil: Quantification of rhizodeposition from root to ecosystem scale".GLOBAL CHANGE BIOLOGY 24.1(2018):1-12. |
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