Báo cáo lâm nghiệp: "Response of Douglas-ﬁr leaf area index and litterfall dynamics to Swiss needle cast in north coastal Oregon, USA" ppt

... 121–132 121c INRA, EDP Sciences, 2007DOI: 10.1051/forest:2006096Original articleResponse of Douglas-ﬁr leaf area index and litterfall dynamics to Swiss needle cast in north c oastal Oregon, USAAaron ... foliage and ﬁne woody litterfall; and (3) monthly distribution of foliage litterfall. Swiss needle cast was expected to cause a decrease in standing LAI, an in- crease in annual litterfall (including ... to crown base mLITTERFOLAnnual foliage litterfall per unit of ground area m2m−2LAI Standing leaf area index (unit of leaf area per unit of ground area; total one-sided) m2m−2FALL Indicator...

Báo cáo lâm nghiệp: "Response of the Norway spruce (Picea abies [L.] Karst.) root system to changing humidity and temperature conditions of the sit" ppt

... to exhibit up to a 60% increase in the vitality of ﬁne roots and up to a 70% increase in the mycorrhizal infection of ﬁne roots. e injury had no impact on the type of mycorrhiza. Operating ... present in all age classes and one stand includes healthy and injured trees growing side by side (in Moravec even dead standing trees). e primary objective of the survey was to com-pare within ... are the increased performance of healthy roots with energy being concentrated to height increment – the assimilatory tissues begin to show symptoms of injury. After breaking “certain bounds”...

Báo cáo lâm nghiệp: "Response of birch (Betula pendula Roth) phytophages to liming" pdf

... between the spring and summer aspect is related to the spring feeding and persistence of leaves with mines even in the summer season (Fig. 1c). In the case of mining insects of the genus Eriocrania ... by the extent of damage to the assimilatory area in feeding caused by an undetermined hymenopterous larva (summer increase), weevils (spring and summer decline and increase in 2007), Coleophora ... of phytophages developing on leaves (sucking, mining and leaf- eating) is nearly missing. C (1980) reported that larvae of monophagous and oligophagous species preferred young extend-ing...

Báo cáo lâm nghiệp:" Response of newly planted Norway spruce seedlings to fertilization, irrigation and herbicide treatments" pps

... due to transplanting shock overshadowed changes of the environment [21]. This stresses the need examining inter-actions between seedling types, seedling handling and regen-eration treatments in ... flooding in the irrigation treatmentduring the growing season of 1998, irrigation was reduced during1999 and mean irrigation amounted to about 44 mm month–1. Duringthe growing season of year ... planting, in August and November the first growing season and in November the second growing season. Current-year needle colourwas registered in June, August and November the first growing sea-son...

Báo cáo lâm nghiệp: "Response of shoot growth and gas exchange of Picea abies clones to rain acidity and the addition of ions" ppt

... 728-733Response of shoot growth and gas exchange of Picea abies clones to rain acidity and the addition of ionsP. Van ElsackerI. ImpensDepartment of Biology, University of Antwerp ... thought to be very important. Interfer-ence of pollutants with the ecophysiologi-cal performance of forest trees needs to be investigated in order to understand theactual ... treatments.Discussion and ConclusionThe reduction of CER and Gn at pH 4.0+ and the significant pH x ions interactionsuggest a synergism between increasingacidity and the addition of the...

Báo cáo lâm nghiệp: "Characteristics of 3rd (Querci-fageta s. lat.) and 4th (Fageta (abietis) s. lat.) vegetation tiers of north-eastern Moravia and Silesia (Czech Republic)" pps

... representation of Pinus sylvestris in 3rd VT in the western part of the NFA 32 and the northern part of the NFA 29 (i.e. western part of the Opavský biogeographical region, up to the crossing in the ... (including also non-forest land) (Fig. 1). It is dominant in the territory of Moravia and Silesia in the Středomoravské Karpaty hills, in the part of the Bílé Karpaty Mts., in the foothills of ... forest-typological mappings in the study area including the determination of the vegetation tiers were done by the authors in the frame of the recovery of Forest management plans of indi-vidual Management-plan...

Báo cáo lâm nghiệp: " Changes of the mixed mountain virgin forest after 70 years on a permanent plot in the Ukrainian Carpathians" pps

... mosaic of small spots of developmental stages and phases in the plot, and with distinct volume of lying deadwood. Changes that took place in the studied forest since the 1930’s were not influenced ... into thin diameter classes, which is related to the ability of ﬁr to persist in the shade with minimal increments and thus wait for favourable light conditions. Yet, a high number of ﬁrs in ... resistant to windstorm in the plot. On the contrary, spruce seems to be the species most susceptible to wind damage. Insect damage of spruce is, with respect to the small proportion of spruce in...

Báo cáo lâm nghiệp: "Evapotranspiration of a declining Quercus robur (L.) stand from 1999 to 2001. I. Trees and forest floor daily transpiration" ppsx

... difficult to interpret for several reasons:(i) in the thinned plot, 2 periods out of 3 occur during leaf- flush-ing and caterpillars attacks, when variability is probablyincreased and (ii) in the ... velocityprofiles of water flow in trunks of Norway spruce and oak and res-ponse of spruce to severing, Tree Physiol. 10 (1993) 367–380.[12] Clearwater M.J., Meinzer F.C., Andrade J.L., Goldstein G., ... removed 32% of oakbasal area. Most of the thinned trees were healthy or suffering fromless than 25% of crown leaf loss according to visual assessment [43].Decline symptoms appeared since the...

Báo cáo lâm nghiệp: "Evapotranspiration of a declining Quercus robur (L.) stand from 1999 to 2001. II. Daily actual evapotranspiration and soil water reserve" potx

... Daily In% var-ied between 18.2 and 27.7% in the thinned plot and between22.3 and 43.4% in the control plot. In the thinned plot, In% dur-ing winter 2000–2001 is similar between leafy and non-leafyperiods, ... Control).Evapotranspiration in a declining oak stand 621was deficitary (–78 mm) in leafy period, in particular in May(–11.6 mm) and July (–32.5 mm). Rainfall interception (In% )during the leafy periods varied ... varied between 18% and 44% of inci-dent rain according to the years. Nizinski and Saugier [27], in a 120 years old sessile oak stand estimated In% from 28% to 41.2%. Those values stand well with...

Báo cáo lâm nghiệp: "Effects of light intensity on the growth and energy balance of photosystem II electron transport in Quercus alba " potx

... 48]).With increasing light intensity, photosynthesis rate increasedfrom HS to MS to LS to FL and thus more biomass was pro-duced by the same amount of leaf area. The rapid rise in LARwith decreasing ... 46% of that under full sunlight. The shift from photochemical to non-photochemical quenching occurred in response to increasing actinic light and as growth irradiance declined, the ‘quenching ... (SLA; cm2 g–1) and leaf weight measured for each seedling, total leaf area (LA; cm2) was calculated. Leaf area to total biomass ratio(LAR; cm2 g–1) and leaf area to root weight ratio...

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