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Statements

Subject Item
n2:RIV%2F67179843%3A_____%2F10%3A00343340%21RIV11-MSM-67179843
rdf:type
n6:Vysledek skos:Concept
dcterms:description
Stem respiration is an important part of forest ecosystem CO2 flux. We measured stem CO2 efflux continuously by an automatic system in the Norway spruce forest planted in 1981. The respiration chambers were placed on eight trees in the height of 1.3 m and on two of them also in the heights of 3.0 and 4.5 m in the growing seasons 2006 - 2009. We measured also incident radiation, precipitations, transpiration flux, stem increment rate and stem temperature. Seasonal course of stem CO2 efflux normalized to 10°C (R10) followed the pattern of the stem growth. They increased in the beginning of season up to its maximum in July and then decreased. However, this dependence was disturbed by external factors especially by alternating of water stress and rain events. Rain events after a dry period caused increase in R10 up to 60%. We observed diurnal course of R10 with maxima during night hours. Oscillation of R10 had amplitude up to 50% of mean daily (24 hours) value of R10. Stem respiration is an important part of forest ecosystem CO2 flux. We measured stem CO2 efflux continuously by an automatic system in the Norway spruce forest planted in 1981. The respiration chambers were placed on eight trees in the height of 1.3 m and on two of them also in the heights of 3.0 and 4.5 m in the growing seasons 2006 - 2009. We measured also incident radiation, precipitations, transpiration flux, stem increment rate and stem temperature. Seasonal course of stem CO2 efflux normalized to 10°C (R10) followed the pattern of the stem growth. They increased in the beginning of season up to its maximum in July and then decreased. However, this dependence was disturbed by external factors especially by alternating of water stress and rain events. Rain events after a dry period caused increase in R10 up to 60%. We observed diurnal course of R10 with maxima during night hours. Oscillation of R10 had amplitude up to 50% of mean daily (24 hours) value of R10.
dcterms:title
Diurnal and seasonal dynamics in temperature normalized stem CO2 efflux of Norway spruce Diurnal and seasonal dynamics in temperature normalized stem CO2 efflux of Norway spruce
skos:prefLabel
Diurnal and seasonal dynamics in temperature normalized stem CO2 efflux of Norway spruce Diurnal and seasonal dynamics in temperature normalized stem CO2 efflux of Norway spruce
skos:notation
RIV/67179843:_____/10:00343340!RIV11-MSM-67179843
n3:aktivita
n14:Z n14:P
n3:aktivity
P(2B06068), Z(AV0Z60870520)
n3:dodaniDat
n8:2011
n3:domaciTvurceVysledku
n5:4084268 n5:2250918 n5:5625459
n3:druhVysledku
n7:O
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
254766
n3:idVysledku
RIV/67179843:_____/10:00343340
n3:jazykVysledku
n12:eng
n3:klicovaSlova
stem; respiration; Norway spruce; CO2 efflux
n3:klicoveSlovo
n11:respiration n11:CO2%20efflux n11:stem n11:Norway%20spruce
n3:kontrolniKodProRIV
[F11F1BD4A639]
n3:obor
n17:ED
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n13:2B06068
n3:rokUplatneniVysledku
n8:2010
n3:tvurceVysledku
Pavelka, Marian Dařenová, Eva Janouš, Dalibor
n3:zamer
n16:AV0Z60870520