Ca. Berryman et al., THE INFLUENCE OF CO2 ENRICHMENT ON GROWTH, NUTRIENT CONTENT AND BIOMASS ALLOCATION OF MARANTHES-CORYMBOSA, Australian Journal of Botany, 41(2), 1993, pp. 195-209
Seedlings of Maranthes corymbosa Blume, an evergreen tree of tropical
Australia and Indonesia were grown for 32 weeks under conditions of am
bient and elevated (700 mumol CO2 mol-1) CO2 in tropical northern Aust
ralia. Seedlings were exposed to ambient temperature, vapour pressure
deficit and photon flux density fluctuations. Rates of germination and
percentage germination were not affected by elevated CO2.Total plant
biomass, height growth, total plant leaf area, numbers of leaves and b
ranches and specific leaf weight were significantly increased by eleva
ted CO2. Root:shoot ratio and foliar P, K, Mg, Mn and Ca levels were u
naffected but foliar nitrogen levels were decreased by elevated CO2, N
utrient-use-efficiency was unaffected for phosphorus, magnesium, manga
nese, calcium and potassium but nitrogen-use-efficiency increased in r
esponse to elevated CO2.