Growth and biomass partitioning of northern red oak and yellow- poplar seedlings: effects of shading and grass root competition

Thomas E Kolb, K. C. Steiner

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Seedling growth of Quercus rubra and Liriodendron tulipifera were compared under conditions of grass root competition (Poa pratensis). Total seedling biomass of oak was greater than yellow-poplar in all environments and harvests because of an initial growth advantage from larger seed reserves, but biomass relative growth rate of yellow-poplar was greater than oak in all environments. Grass root competition reduced biomass of both species, but more for yellow-poplar. In the absence of grass, shading reduced biomass of both species, especially yellow-poplar; shading in the presence of grass resulted in a nonsignificant increase in biomass of both species. Shoot-root ratio and partitioning of leaf and root biomass to surface area for yellow-poplar was always greater than oak. In response to competition for soil reosurces, both species increased biomass partitioning to the root at the expense of the shoot. In response to shading, yellow-poplar increased leaf area proportion; oak did not. Thinner leaves and a more fibrous root system were more important in explaining yellow-poplar's higher relative growth rate under conditions of shading and root competition compared to oak than differences in shoot-root weight ratio or plasticity in biomass partitioning. -from Authors

Original languageEnglish (US)
Pages (from-to)34-44
Number of pages11
JournalForest Science
Volume36
Issue number1
StatePublished - 1990
Externally publishedYes

Fingerprint

root competition
Liriodendron tulipifera
Quercus rubra
biomass allocation
shading
shade
seedling
grass
grasses
seedlings
biomass
Quercus
shoot
root-shoot ratio
fibrous roots
root system
leaf area
shoots
Poa pratensis
plasticity

ASJC Scopus subject areas

  • Forestry
  • Plant Science

Cite this

Growth and biomass partitioning of northern red oak and yellow- poplar seedlings : effects of shading and grass root competition. / Kolb, Thomas E; Steiner, K. C.

In: Forest Science, Vol. 36, No. 1, 1990, p. 34-44.

Research output: Contribution to journalArticle

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