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Growth and Wood/Bark Properties of Abies faxoniana Seedlings as Affected by Elevated CO 2
Author(s) -
Qiao YunZhou,
Zhang YuanBin,
Wang KaiYun,
Wang Qian,
Tian QiZhuo
Publication year - 2008
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/j.1744-7909.2007.00604.x
Subject(s) - bark (sound) , sowing , biomass (ecology) , horticulture , botany , picea abies , dry weight , chemistry , zoology , biology , agronomy , ecology
Growth and wood and bark properties of Abies faxoniana seedlings after one year's exposure to elevated CO 2 concentration (ambient + 350 (± 25) μmol/mol) under two planting densities (28 or 84 plants/m 2 ) were investigated in closed‐top chambers. Tree height, stem diameter and cross‐sectional area, and total biomass were enhanced under elevated CO 2 concentration, and reduced under high planting density. Most traits of stem bark were improved under elevated CO 2 concentration and reduced under high planting density. Stem wood production was significantly increased in volume under elevated CO 2 concentration under both densities, and the stem wood density decreased under elevated CO 2 concentration and increased under high planting density. These results suggest that the response of stem wood and bark to elevated CO 2 concentration is density dependent. This may be of great importance in a future CO 2 enriched world in natural forests where plant density varies considerably. The results also show that the bark/wood ratio in diameter, stem cross‐sectional area and dry weight are not proportionally affected by elevated CO 2 concentration under the two contrasting planting densities. This indicates that the response magnitude of stem bark and stem wood to elevated CO 2 concentration are different but their response directions are the same.