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Báo cáo lâm nghiệp: "Effect of stand segmentation on growth and development of Norway spruce stands" pps

Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Effect of stand segmentation on growth and development of Norway spruce stands" pps

... international IUFRO experiment dealing with the ra-tionalization of young spruce stand tending (A 1977). One part of this series, Machov CZ 14 experi-Effect of stand segmentation on growth and ... values (mean and standard deviation) of stand volume (open triangles) and volume of mean stem (grey circles) of spruce stands in Machov experiment at the age of 41 years (2007). Comparison for three ... of stand segmentation (track width) on production characteristics and static stability of young spruce stands it can be stated:– Positive effect on growth characteristics was found only for...
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Báo cáo lâm nghiệp: "Environmental risk assessment based on semi-quantitative analysis of forest management data" pptx

... the position towards the focus of biotic pest activity, stand age, and the proportion of spruce in a given stand.  e fourth Table 2. Forest damage classifi cation and assignment of binary ... older stands, higher proportion of spruce, location in the vicinity of the focus of biotic agent activity, and growing at drier sites (the order is based on Wald statistics). Mature stands ... was carried out on sample plots arranged on linear transects situated across the Kysuce and Orava re-gions in directions of the highest variability of site and stand conditions. Sample plots...
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Báo cáo lâm nghiệp: "Effects of selective thinning on growth and development of beech (Fagus sylvatica L.) forest stands in south-eastern Slovenia" docx

... relevés from the control stands (R3 and R4 versus R7 and R8) indicates differences in site conditionsbetween plots P1 and P2 (Fig. 6 and Tab. VII).4. DISCUSSION AND CONCLUSIONSThinning caused ... high number of crop trees in the young stands and al-teration of crop trees caused one of the main weaknesses of the selection thinning type, namely, high costs. In the total stand tending costs, ... between 1991 and 50 A. Boncina et al.Figure 1. Development of stand basal area of the thinned (T1 and T2) and control (C1 and C2) stands.were recorded and their abundance was estimated for each...
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Báo cáo lâm nghiệp:"Succession from bog pine (Pinus uncinata var. rotundata) to Norway spruce (Picea abies) stands in relation to anthropic" docx

... (M327).The spruce and bog pine mixed stand of phytocoenosisNo 2 shows a simpler vegetation structure (Figs. 4 and 5,³³Succession from bog pine to Norway spruce stands 353mixed stand, and other ... [24], and the one of other bryophytes Corleyet al. [9].2.3. Tree stand structure On a surface of 400 m2 of the bog pine and Norway spruce mixed stand (phytocoenosis No 2), all living and dead ... competition of bog pine and Norway spruce inthe mixed stand; (iii) to propose a dynamic scheme (spatio-temporal reconstruction) based on historical data, synchroni-cal synusial observations of the...
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Báo cáo lâm nghiệp: "Apoplast: a sensitive site for assessing some biochemical in Norway spruce needles" potx

... 4,SwitzerlandIntroductionThe study of the cell wall-plasma mem-brane interphase is of great importance forthe understanding of gaseous air pollu-tants and leaf cell interactions. ... without disruption of homeostasis.Based on these observations, it ap-pears that the apoplast of Norway spruce needles is a sensitive site for the detection of stresses induced ... of Gaseous AirPollution in Agriculture and Horticulture. Butter-worths, London, pp. 111-138exposure to a high 03 concentration indi-cates the sensitivity of our clone...
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Báo cáo lâm nghiệp: "Effect of gibberellic acid and ethephon on the germination of European beech dormant and chilled beechnuts" pptx

... effect of gibberellic acid and ethephon on overcoming beechnut dormancy and stimulation of beechnut germination.MATERIALS AND METHODSSeedsree beechnut seedlots with a moisture con-tent of ... 4; Fig. 2).We found no apparent effect of different concen-trations of ethephon or GA3 on germination ca-pacity. e only exception was the application of 1,000 mg·l–1 GA3 to dormant seeds ... effect of gib-berellic acid, paclobutrazol and ethephon on the germina-tion of Fagus sylvatica and Picea sitchensis seeds exposed to varying durations of moist chilling. Seed Science and Technology,...
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Báo cáo lâm nghiệp: "Effect of climatic factors on the dynamics of radial increments of Norway spruce, European beech and sessile oak" potx

... Individual dispositions of tree, site and climatic conditions of each tree contribute to their forma-tion. Possible damage to trees and change in the growth conditions are frequent reasons for incre-ment ... precipitation of the actual year is most significant for 100% of trees and for almost 80% of trees in this stand, and only for 10% or 5% of trees the precipitation in September and October of the ... particu-lar stands was considerably different. e lowest proportion of trees with the statistically significant effect of precipitation on increment indexes was re-corded in stand No. 3. In this stand...
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Báo cáo lâm nghiệp: "Effect of initial height of seedlings on the growth of planting material of Norway spruce (Picea abies [L.] Karst.) in mountain conditions" ppsx

... in Changing Environmental Conditions.Effect of initial height of seedlings on the growth of planting material of Norway spruce (Picea abies [L.] Karst.) in mountain conditionsA. J, J. ... mountain population of Norway spruce after their planting in extreme mountain conditions compared to the develop-ment of seedlings of standard and large dimensions.MATERIAL AND METHODSSeeds ... ERIKSSON G., 1995. Early effects of long nights on budset, bud dormancy and abscisic acid content in two populations of Picea abies. Forest Genet-ics, 2: 207–216.SIMPSON D.G., 1994. Seasonal and...
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Báo cáo lâm nghiệp: "Effect of plant age, temperature and rainfall on Lepidoptera insect pests collected with light traps in a Eucalyptus grandis plantation in Brazil" docx

... temperature and rainfall during the five years of study withPearson correlation based on a significance level of 5% with the t test.The effect of age of the plantation on monthly mean annual number of ... (ºC) and rainfall (mm) (A) and totalnumber of individuals of Lepidoptera (B) and of major (C) and lesser (D)important pests collected in a Eucalyptus grandis plantation in theMunicipality of ... plantation has about 40% of the land covered by nativevegetation. The higher number of collections of individuals of majorimportant pest species during periods of cooler temperatures and lower...
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Báo cáo lâm nghiệp: "Effect of defoliation by Thaumetopoea pityocampa (Den. & Schiff.) (Lepidoptera: Thaumetopoeidae) on annual diameter increment of Pinus brutia Ten. in Turkey" ppt

... Turkey, and Israel [27]. Further studies are needed to clarify the taxonomicposition of the studied populations.Th. pityocampa Schiff is known to feed on leaves and buildlarge silk nests on the ... nests on the top of the trees. In addition, PPM hasurticating hairs, which cause allergies resulting in conjunctivitis,respiratory congestions and asthma [29]. The PPM is one of themost harmful ... mostly observed on P. brutiain Turkey, which consists of the majority of forests (with morethan 3 million hectares) and are distributed particularly in thecoastal regions of Turkey, namely,...
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