@article{fdi:010061750,
  title = {{D}ynamics of soil exploration by fine roots down to a depth of 10 m throughout the entire rotation in {E}ucalyptus grandis plantations},
  author = {{L}aclau, {J}. {P}. and da {S}ilva, {E}. {A}. and {L}ambais, {G}. {R}. and {B}ernoux, {M}artial and le {M}aire, {G}. and {S}tape, {J}. {L}. and {B}ouillet, {J}. {P}. and {G}onccalves, {J}. {L}. {D}. and {J}ourdan, {C}. and {N}ouvellon, {Y}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}lthough highly weathered soils cover considerable areas in tropical regions, little is known about exploration by roots in deep soil layers. {I}ntensively managed {E}ucalyptus plantations are simple forest ecosystems that can provide an insight into the belowground growth strategy of fast-growing tropical trees. {F}ast exploration of deep soil layers by eucalypt fine roots may contribute to achieving a gross primary production that is among the highest in the world for forests. {S}oil exploration by fine roots down to a depth of 10 m was studied throughout the complete cycle in {E}ucalyptus grandis plantations managed in short rotation. {I}ntersects of fine roots, less than 1 mm in diameter, and medium-sized roots, 1-3 mm in diameter, were counted on trench walls in a chronosequence of 1-, 2-, 3.5-, and 6-year-old plantations on a sandy soil, as well as in an adjacent 6-year-old stand growing in a clayey soil. {T}wo soil profiles were studied down to a depth of 10 m in each stand (down to 6 m at ages 1 and 2 years) and 4 soil profiles down to 1.5-3.0 m deep. {T}he root intersects were counted on 224 m(2) of trench walls in 15 pits. {M}onitoring the soil water content showed that, after clear cutting, almost all the available water stored down to a depth of 7 m was taken up by tree roots within 1.1 year of planting. {T}he soil space was explored intensively by fine roots down to a depth of 3 m from 1 year after planting, with an increase in anisotropy in the upper layers throughout the rotation. {A}bout 60% of fine root intersects were found at a depth of more than 1 m, irrespective of stand age. {T}he root distribution was isotropic in deep soil layers and kriged maps showed fine root clumping. {A} considerable volume of soil was explored by fine roots in eucalypt plantations on deep tropical soils, which might prevent water and nutrient losses by deep drainage after canopy closure and contribute to maximizing resource uses.},
  keywords = {root front ; root growth ; root density ; {E}ucalyptus ; forest ; oxisol ; tropical tree ; {B}razil ; {BRESIL}},
  booktitle = {},
  journal = {{F}rontiers in {P}lant {S}cience},
  volume = {4},
  numero = {},
  pages = {243 [12  en ligne]},
  ISSN = {1664-462{X}},
  year = {2013},
  DOI = {10.3389/fpls.2013.00243},
  URL = {https://www.documentation.ird.fr/hor/fdi:010061750},
}