气候变化领域集成服务门户(CCPortal): Influences of edaphoclimatic conditions on deep rooting and soil water availability in Brazilian Eucalyptus plantations

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DOI	10.1016/j.foreco.2019.117673
	Influences of edaphoclimatic conditions on deep rooting and soil water availability in Brazilian Eucalyptus plantations
	Evangelista Silva V.; Nogueira T.A.R.; Abreu-Junior C.H.; He Z.; Buzetti S.; Laclau J.-P.; Teixeira Filho M.C.M.; Grilli E.; Murgia I.; Capra G.F.
发表日期	2020
ISSN	0378-1127
卷号	455
英文摘要	Brazilian roundwood industry is one of the most important and productive in the world, with Eucalyptus plantations alone representing 73% of the total planted forests. Deep rooting in these plantations represents a more common phenomena than generally expected. However, there is still a lack of information on environmental factors that drive root growth in deep soil layers, with particular emphasis on edaphoclimatic conditions, and related consequence in terms of soil water behavior. As a part of a larger project, this research aimed to investigate soil water and fine root system distribution in deep tropical soils under a commercial Eucalyptus plantation chronosequence. Along a 2800-km gradient (from south- to north-east Brazil), 14 experimental areas were planted with a “plastic” clone (E. urophylla) and investigated in terms of climatic conditions, soil and water features, and plant/stand development for an entire 6-years rotation period. Fine roots distribution were investigated in one site (in Brazil) till to 20 m deep at 3, 9, 24, 48, and 65 months after planting. Results showed a fast displacement of the root front down to 75, 325, 825, 1250, and 1575 cm at month 3, 9, 24, 48, and 65 after planting, respectively. Fine root densities (g cm−3) and proportional water capture exponentially decreased with soil depth. Deep fine roots showed a relativelly higher efficiency in acquiring water than the shallower, denser roots. The relationship between stand height vs root front depth followed an exponential trend, suggesting that these stands developed relatively faster in height rather than in depth during the first 48 months, with the opposite characterizing plantation afterwards. Regardless of stand age, E. urophylla trees rapidly explored a considerable volume of soil at a relatively limited carbon cost. Multivariate statistics showed that edaphoclimatic conditions play a major role in Eucalyptus plant/stand development. This study outlined the major role played by soil development. From poorly developed sandy Entisols, to medium developed Inceptisols, and to most developed fine textured Oxisols, both plant growth and stand productivity greatly improved accordingly. This study suggests that soil type, together with other environmental factors, are likely to influence both the development and behavior of Eucalyptus plantations for an extent greater than commonly anticipated. © 2019 Elsevier B.V.
关键词	Multivariant analysis Plant life extension Textures Deep rooting Entisols Eucalyptus urophylla Oxisols Soil development Soil moisture climate conditions dicotyledon Entisol environmental factor growth Inceptisol Oxisol root system sandy soil soil depth soil water water availability Brazil Eucalyptus Eucalyptus urophylla
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133170
推荐引用方式 GB/T 7714	Evangelista Silva V.,Nogueira T.A.R.,Abreu-Junior C.H.,et al. Influences of edaphoclimatic conditions on deep rooting and soil water availability in Brazilian Eucalyptus plantations[J]. Forest Ecology and Management,2020,455.
APA	Evangelista Silva V..,Nogueira T.A.R..,Abreu-Junior C.H..,He Z..,Buzetti S..,...&Capra G.F..(2020).Influences of edaphoclimatic conditions on deep rooting and soil water availability in Brazilian Eucalyptus plantations.,455.
MLA	Evangelista Silva V.,et al."Influences of edaphoclimatic conditions on deep rooting and soil water availability in Brazilian Eucalyptus plantations".455(2020).