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Titolo:
Effects of long-term CO2 enrichment and nutrient availability in Norway spruce. II. Foliar chemistry
Autore:
Roberntz, P; Linder, S;
Indirizzi:
Swedish Univ Agr Sci, Dept Prod Ecol, SE-75007 Uppsala, Sweden Swedish Univ Agr Sci Uppsala Sweden SE-75007 l, SE-75007 Uppsala, Sweden
Titolo Testata:
TREES-STRUCTURE AND FUNCTION
fascicolo: 1, volume: 14, anno: 1999,
pagine: 17 - 27
SICI:
0931-1890(199907)14:1<17:EOLCEA>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELEVATED ATMOSPHERIC CO2; SCOTS PINE; STOMATAL CONDUCTANCE; LEAF ANATOMY; GROWTH; NEEDLES; PLANTS; TREES; RESPONSES; LEAVES;
Keywords:
Picea abies; carbohydrates; elevated CO2; fertilisation; macronutrients;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Roberntz, P Swedish Univ Agr Sci, Dept Prod Ecol, POB 7042, SE-75007 Uppsala, Sweden Swedish Univ Agr Sci POB 7042 Uppsala Sweden SE-75007 Sweden
Citazione:
P. Roberntz e S. Linder, "Effects of long-term CO2 enrichment and nutrient availability in Norway spruce. II. Foliar chemistry", TREES, 14(1), 1999, pp. 17-27

Abstract

Branches on 30-year-old Norway spruce trees [Picea abies (L. ) Karst.] wereexposed to ambient (AMB) or ambient plus 350 mu mol CO2 mol(-1) (EL) for 4years (except winters), using the branch bag technique (BB). The trees were growing on plots with low (control) and high (irrigated-fertilised) availability of soil nutrients. The seasonal variation in foliar macronutrients and non-structural carbohydrates in current and 1-year-old shoots was monitored throughout the treatment period. When the branches were harvested at the end of treatment, macronutrients were analysed in five age classes of foliage. The concentration of all elements, except magnesium, generally increased in AMB, i.e. a 'bag effect', but decreased as an effect of EL, i.e. a 'CO2 effect'. At the final harvest K, P, N and S were reduced in young needles by EL, whereas Mg was reduced in older needles on both plots. A change in needle morphology by EL possibly caused a dilution effect in irrigated-fertilised needles, but not in control needles. Reductions in K and Mg are suggested to be an effect of increased phloem transport from the branch, in consequence of higher rates of carbon fixation in EL. Foliage in BBs had higher concentration of Ca, but there was no significant effect of the EL-treatment, indicating that elevated CO2 had no effect on stomatal conductance. Quinic acid concentration decreased, but shikimic acid concentration increased in BBs, independently of CO2 treatment. Concentrations of starch and sugars increased in the EL-treatment, but pinitol decreased.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 01:31:50