Seasonal root distribution and soil surface carbon fluxes for one-year-old Pinus radiata trees growing at ambient and elevated carbon dioxide concentration
Open Access
- 1 November 1996
- journal article
- Published by Oxford University Press (OUP) in Tree Physiology
- Vol. 16 (11-12) , 1015-1021
- https://doi.org/10.1093/treephys/16.11-12.1015
Abstract
The increase in number of fine (< 0.5 mm diameter) roots of one-year-old clonal Pinus radiata D. Don trees grown in large open-top field chambers at ambient (362 μmol mol−1) or elevated (654 μmol mol−1) CO2 concentration was estimated using minirhizotron tubes placed horizontally at a depth of 0.3 m. The trees were well supplied with water and nutrients. Destructive harvesting of roots along an additional tube showed that there was a linear relationship between root number estimated from the minirhizotron and both root length density, Lv, and root carbon density, Cv, in the surrounding soil.Keywords
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