Báo cáo lâm nghiệp: "Response to natural and simulated browsing of two Mediterranean oaks with contrasting leaf habit after a wildﬁre" docx

... latewinter to early summer, and eat foliage, shoots and acorns of oaks insummer and autumn [20]. We have carried out two different studiesin these rangelands to assess the effect of post-fire natural and ... Mediterranean oaks with contrasting leaf habit after a wildfireJosep Maria E*, Abdessamad H,JavierRCentre de Recerca Ecològica i Aplicacions Forestals (CREAF) i Unitat d’Ecologia, Universitat ... regeneration patterns and restoration practices after a large wildfire in NE Spain: Challengesfor fire ecology and landscape restoration, in: Trabaud L., Prodon R.(Eds.), Fire and Biological Processes,...

Báo cáo lâm nghiệp: "Response to an ozone gradient of growth and enzymes implicated in tolerance to oxidative stress in Acer saccharum (Marsh.) seedlings" pot

... 81–100%) was used to evaluate the percentage of symptomatic leavesper seedling. We considered that a leaf was symptomatic if at least2% of his area was injured.2.3. Enzymatic analysis2.3.1. ... nL.L−1O3have more than 80% of symptomatic leaves.Response of Acer saccharum to an O3gradient 389when available. The cumulative eﬀects of O3on the biomass wereanalyzed at this date. The two ... photorespiratory pathway)in Pinus taeda needles exposed to air pollution.As a shade tolerant, slow growing species [3], sugar maplehas a low assimilation rate, leading to a compromise be-tween maximizing...

Báo cáo lâm nghiệp: " Root system development and health condition of sycamore maple (Acer pseudoplatanus L.) in the air-polluted region of Krušné hory Mts" ppt

... Mts. and in the region of Bohemian-Moravian Upland or in a mu-tual comparison between the two regions (see stand situation 5, mutual comparison of stand situation 2 and 3, mutual comparison of ... composition of forest stands being rather low, the study of the species and mainly of its root system has been paid little attention so far. Available data which are however of rather general character ... roots have a decisive role in the uptake of water and nutrients. e parameters measured and evalu-ated were as follows: biomass of ﬁne roots; vitality of ﬁne roots according to J and H...

Báo cáo lâm nghiệp: "Age-related physiological and structural traits of chestnut coppices at the Castelli Romani Park (Italy)" pot

... and annual mean maximum air temperature(Tmax), monthly and annual mean minimum air temperatures (Tmin),monthly and annual mean air temperature (Tm) and total monthly and annual rainfall ... determineddrying at 80 °C to constant mass. Leaf mass per unit leaf area (LMA, mg cm–2) was calculated bythe ratio of leaf dry mass and one-sided leaf area [50]; specific leaf area (SLA, cm2 g–1) ... [54]. Total basal area (BA,m2 ha–1) was calculated. Leaf Area Index (LAI, m2 m–2) was measured in each sample area(20 measurements per stand age) by the LAI 2000 Plant Canopy Ana-lyser...

Báo cáo lâm nghiệp: "Picea glauca dynamics and spatial pattern of seedlings regeneration along a chronosequence in the mixedwood section of the boreal forest" potx

... ha–1). During the following decades,Figure 1. Total basal area (m2 ha–1), and basal area distribution of Picea glauca, Populus tremuloides and Abies balsamea along a chro-nosequence after ... dominant tree species(Picea glauca, Populus tremuloides and Abies balsamea) wererecorded, and basal area was calculated. White spruce (P. glauca) treeheight was measured with an Abney hand ... section of Saskatchewan boreal forest.794 T. Awada et al.Our results show that Picea glauca regeneration depends onthe presence of propagules and seedbed characteristics at earlystand age and, ...

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

... 245–254Table 4. Climatic data in 1961–2004 and comparison with normal values in 1961–1990Period Characteristics and measured valuesmean annual air temperatures (°C) mean air temperatures in ... increase in July and August). Annual solar radiation increased by 210 hours in the aligned series, the onset date of mean air temperatures of 0°C was gradually shifted backwards up to 18 days, ... parameter of Index p calls for an explanation: it is a calculated parameter deﬁning the relation between the size of the root system and size of the aboveground part. It was calculated as the ratio...

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

... challenges limit the number of stand-level estimates of total leaf area, to the extent that rela-tively little is known about causes of variation in total leaf area and its annual and seasonal ... species, leaf surface area comprises the vast majority of the total pho-tosynthetic surface area and is most commonly measured asprojected or one-sided leaf area. Total leaf area and, to a lesserextent, ... Leaf area indexLAI has been shown to increase with enhanced nutrition[3], greater water availability [20], increased age (up to a steady-state at 5 to 20 y; [29]), and greater stand basal area[17]....

Báo cáo lâm nghiệp: " Managing diameter growth and natural pruning of Parana pine, Araucaria angustifolia (Bert.) O Ktze., to produce high value timber" ppt

... height of crown base on age, height and dbh together with associated relevant statistics.Variable Estimated parameter Standard error T to H0:parameter = 0Prob > |T| Variance inflation factorIntercept ... growth and natural pruning of Parana pine, Araucaria angustifolia (Bert.) O Ktze., to produce high value timberLeif NUTTO a , Peter SPATHELFb*, Robert ROGERSc a Avenida da Galicia no 5, Parque ... states of Rio Grande do Sul, Santa Catarina, and Paraná with lesserconcentrations in São Paulo, Minas Gerais, Rio de Janeiro and in the Argentine province of Misiones [12].Parana pine is found at...

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

... corresponding to an average production of Norway spruce of about 9 m3 ha–1 year–1,which is an average value for the area. Yearly precipitation in the areais about 700 mm and it is relatively ... herbicide and fertilization treatments before planting and after the first and second growing season. Standard error of the mean are given in italicsNot irrigated IrrigatedCFHFH CFHFHBefore plantingOld ... subgroup was divided into four diameter-classes with equal amount of seedlings in each class and one seedlingper diameter-class was randomly chosen for harvest. The seedlingswere carefully excavated...

Báo cáo lâm nghiệp: "Contribution to knowledge of Hylesinus fraxini (Panzer, 1779) (Coleoptera: Scolytidae) natural enemies from Northern Moravia (Czech Republic)" pdf

... predation was estimated in the following way. Pre-dation was counted as ratio of bark damaged by birds and total bark area with galleries. e inﬂu-ence of insects’ predation and parasitoids ... 1836Hymenoptera: Eurytomidaeparasitoid, hyperparasitoid140 226 366Eurytoma arctica omson, 1876Hymenoptera: Eurytomidaeparasitoid, hyperparasitoid155 108 263? Hymenoptera: Braconidae parasitoid ? ... Percentage rates of total predation (together birds and insects), total parasitism and total mortality of bark beetles H. fraxini for single species are given in Table 2.Table 1. e results of...

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