气候变化领域集成服务门户(CCPortal): Consequences of clear-cutting and drought on fine root dynamics down to 17 m in coppice-managed eucalypt plantations

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DOI	10.1016/j.foreco.2019.05.010
	Consequences of clear-cutting and drought on fine root dynamics down to 17 m in coppice-managed eucalypt plantations
	Germon A.; Jourdan C.; Bordron B.; Robin A.; Nouvellon Y.; Chapuis-Lardy L.; de Moraes Gonçalves J.L.; Pradier C.; Guerrini I.A.; Laclau J.-P.
发表日期	2019
ISSN	0378-1127
起始页码	48
结束页码	59
卷号	445
英文摘要	Improving our understanding of the spatiotemporal dynamics of fine roots in deep soil layers is of utter importance to manage tropical planted forests in a context of climate change. Our study aimed to assess the effect of clear-cutting and drought on fine-root dynamics down to the water table in Brazilian ferralsol under eucalypt plantations conducted in coppice. Fine roots (i.e. diameter <2 mm)were sampled down to 17 m deep in a throughfall exclusion experiment comparing stands with 37% of throughfall excluded by plastic sheets (−W)and stands without rain exclusion (+W). Root dynamics were studied using minirhizotron in two permanent pits down to 17 m deep, over 1 year before clear-cutting, then over 2 years in coppice, as well as down to 4 m deep in a non-harvested plot (NH)serving as a control. After harvesting, a spectacular fine root growth of trees conducted in coppice occurred in very deep soil layers (>13 m)and, surprisingly, root mortality remained extremely low whatever the depth and the treatment. Total fine-root biomass in coppice down to 17 m depth was 1266 and 1017 g m−2 in +W and −W, respectively, at 1.5 year after the clear-cut and was 1078 g m−2 in NH 7.5 years after planting. Specific root length and specific root area were about 15% higher in −W than in +W. Proliferation of fine roots at great depths could be an adaptive mechanism for tree survival, enhancing the access to water stored in the subsoil. The root system established before clear-cutting provides access to water stored in very deep layers that probably contribute to mitigate the risk of tree mortality during prolonged drought periods when the eucalypt plantations is conducted in coppice after the clear-cut. © 2019
英文关键词	Brazil; Coppice; Deep ferralsol profile; Deep root growth; Eucalyptus grandis; Minirhizotron; Throughfall exclusion
语种	英语
scopus关键词	Climate change; Drought; Dynamics; Groundwater; Plants (botany); Plastic sheets; Soils; Brazil; Coppice; Deep roots; Eucalyptus grandis; Ferralsol; Minirhizotrons; Throughfall exclusion; Forestry; biomass; clearcutting; climate change; coppice; dicotyledon; drought; Ferralsol; fine root; growth; mortality; plantation; root system; soil profile; spatiotemporal analysis; subsoil; throughfall; tropical forest; water table; Brazil; Coppice; Drought; Dynamics; Eucalyptus Grandis; Forestry; Brazil; Eucalyptus grandis
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155966
作者单位	UNESP-São Paulo State University, School of Agricultural Sciences, Botucatu, São Paulo 18610-307, Brazil; Eco&Sols, Univ Montpellier, CIRAD, INRA, IRD, Montpellier SupAgro, Montpellier, France; CIRAD, UMR Eco&Sols, Montpellier, F-34060, France; ESALQ, Forest Science Department, Escola Superior de Agricultura, Luiz de Queiroz, Universidade de São Paulo, CEP 13418-900 Piracicaba, SP, Brazil; ESALQ, Soil Science Department, Escola Superior de Agricultura, Luiz de Queiroz, Universidade de São Paulo, CEP 13418-900 Piracicaba, SP, Brazil; IRD, UMR Eco&Sols, LMI IESOL, BP 1386, CP 18524 Dakar, Senegal
推荐引用方式 GB/T 7714	Germon A.,Jourdan C.,Bordron B.,等. Consequences of clear-cutting and drought on fine root dynamics down to 17 m in coppice-managed eucalypt plantations[J],2019,445.
APA	Germon A..,Jourdan C..,Bordron B..,Robin A..,Nouvellon Y..,...&Laclau J.-P..(2019).Consequences of clear-cutting and drought on fine root dynamics down to 17 m in coppice-managed eucalypt plantations.Forest Ecology and Management,445.
MLA	Germon A.,et al."Consequences of clear-cutting and drought on fine root dynamics down to 17 m in coppice-managed eucalypt plantations".Forest Ecology and Management 445(2019).