Báo cáo lâm nghiệp: "Eﬀects of microsite variation on growth and adaptive traits in a beech provenance trial." pps

Báo cáo lâm nghiệp: "Eﬀect of Melampsora larici-populina on growth and biomass yield of eight clones of Populus nigra" ppsx

... intensity of Melampsora larici-populina occurrence and the value of growth traits and biomass yield in Populus nigra  e correlation between the growth traits of stem diameter and plant height and ... some clones (clones 7 and 107) no yield decline was observed at all or it ranged only from 6% to 9% (clones 49 and 152). It is to note that clone 107 and clone 152 were among the highest-yielding ... stability of the degree of infection within the particular clones of black pop-lar in the years of observation, the relationship be-tween the severity of clone infection by rust and the value of...

Báo cáo lâm nghiệp: "Eﬀects of microsite variation on growth and adaptive traits in a beech provenance trial." pps

... environmental indicators.  e aim of this study was to clarify to what extent the spatial variation of environment a ects growth and adaptive traits in a provenance trial, and whether blocking can ... genetic variation within populations and/ or environmental variation on very small scales.Analysis of covariance confi rmed the expected signifi cant provenance eff ect on all traits (Table2). ... subdivi-sion is achieving homogeneous environmental conditions within blocks so that blocking can re-move the within-trial environmental variation by using blocks as a source of variation in an analysis...

Báo cáo lâm nghiệp: "Eﬀect of species composition, stand density and site index on the basal area increment of oak trees (Quercus sp.) in mixed stands with beech (Fagus sylvatica L.) in northern France" potx

... pure and mixed stands. Growth of oaks in mixed stands with beech 461 The eﬀects of stand density (Rdioak + beech) , species com-position (mixbeech), stand age of oak (ageoak), and site index of ... the stand basal area increment as afunction of dominant height, height increment of the dominant trees, and stand density. To allocate the stand basal area increment to the individual tree basal ... mixed -species stands of oak and beech. The aim of the study was to adapt one of the basic equations of the French growth simulator Fagacées for oak stands to mixed stands with oak and beech. The model...

Báo cáo lâm nghiệp: "Eﬀects of drought and heat on forest insect populations in relation to the 2003 drought in Western Europe" ppt

... insect populations in the context of this exceptional event. Observations of changes in population levels of the main European forest insect pests during and after the drought arepresented and ... prolonged drought on bark beetles The success of the establishment of bark beetle populations on their host tree depends, on the level of the insect popu-lations and the ability of pioneer individuals ... levels the previousyears), and host type (in relation to its tolerance to stress).2. DIRECT EFFECTS OF DROUGHT AND HEAT ON INSECT PERFORMANCES Insect populations can often respond rapidly and...

Báo cáo lâm nghiệp: "Eﬀect of leaf biomass and phenological structure of the canopy on plot growth in a deciduous hardwood forest in northern Japan" pot

... eachcombination of plot and month. Annual leaf biomass was calculatedby summing monthly leaffall.To quantify the phenological pattern of leaffall and the corre-sponding phenological structure of the ... 2006)Abstract – We monitored leaf biomass, seasonal changes in leaffall, and plot growth for 11 years post-thinning in a secondary deciduous hardwood stand dominated by Betula maximowicziana Regel ... 0.05;Tab. II). Effect of leaf biomass and phenological structure on plot growth 731Figure 5. Yearly changes in the ratio of fallen leaf biomass in October and November to annual fallen leaf biomass...

Báo cáo lâm nghiệp: "Eﬀect of tree species substitution on organic matter biodegradability and mineral nutrient availability in a temperate topsoil" pptx

... organic mat-ter biodegradability and consequently on mineral element and major nutriments release and availability. The results showedthat carbon mineralization and nitrogen mineralization can ... water-holding capacity). Carbon-mineralization was monitored; mineral nitrogen, water-extractable organic carbon and mineral elements were determined before and after the incubation. The release ... incubation so as to determine the ex-tent and dynamic of the biodegradation of organic matter, thenature of water extractable organic compounds, their role in mineral availability, and/ or as...

Báo cáo lâm nghiệp: "Eﬃciency of early selection for rotation-aged wood quality traits in radiata pine" pdf

... years for density including ear-lywood and latewood density [22]. Early selection for radiata pine (Pinus radiata) has been examined in growth and wood density. Cotterill and Dean [6] observed early ... as for wood density, the age-age genetic Early selection for wood quality traits in radiata pine 3(2) age trend of heritability of these traits; (3) age-age genetic corre-lations of these traits; ... reducedring wood density and MOE of remaining trees in the ﬁrsttwo or three years after thinning. However the eﬀects of thinning at later ages were smaller than in the early thin-nings.Acknowledgements:...

Báo cáo lâm nghiệp: "Eﬀects of selective thinning on growth and development of beech (Fagus sylvatica L.) forest stands in south-eastern Slovenia" docx

... 52].Classification of thinning methods varies due to differentcriteria, including the type of thinning, intensity (grade), re-turn interval, and the timing of the first thinning [48]. Twomajor types of thinning ... again during the last thinning. In the T2, 258 crop trees were chosen in the first thinning, and only 62% of these trees were chosen again during the last thinning. Only crownsuppression and ... 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 totalstand tending costs, thinning...

Báo cáo lâm nghiệp: "Eﬀects of the clear-cutting of a Douglas-ﬁr plantation (Pseudotsuga menziesii F.) on the chemical composition of soil solutions and on the leaching of DOC and ions in drainage waters" pps

... (Pseudotsuga menziesii F.) o n the chemical composition of soil solutions and on the leaching of DOC and ions in drainage watersJacques R*,SylvainL, Dominique G, Benoợt P, Pascal BINRA Centre ... 70-year-old Douglas-ﬁr plantation on the chemical composition of soil solutions and on leaching of nutrients in drainage waters were observed by a continuous monitoring, six years before and three years ... species, a shortening of rotations and a mechani-sation of the thinning, harvesting and regeneration operationsresult in constraints to the physical, chemical and biologicalproperties of the soil...

Báo cáo lâm nghiệp: "Eﬀects of soil mechanical treatments combined with bramble and bracken control on the restoration of degraded understory in an ancient beech forest" pptx

... dependent on the initial vegetation type and on soil seed bank composi-tion. We therefore encourage additional experiments in differ-ent stand and soil types in order to establish the generality of these ... on the considered soil parameters. Bothdisc and rotary ploughing induced an overall lowering of soil nutrient index and soil compaction, but different or mitigated in uences on soil moisture and ... implements in an ancient beech forest in central Belgium. The purpose of these investigationswas twofold: (1) to explore whether tillage has a long-lastingeffect on soil compaction and soil moisture,...

Báo cáo lâm nghiệp: "Eﬀect of single Quercus ilex trees upon spatial and seasonal changes in soil water content in dehesas of central western Spain" potx

... 355c INRA, EDP Sciences, 2007DOI: 10.1051/forest:2007012Original articleEﬀect of single Quercus ilex trees upon spatial and seasonal changes in soil water content in dehesas of central western ... spring rainfall decreased soil water content quickly until June or July. Soil water content remained nearlyconstant during the rest of the summer. Each year, minimum and maximum soil water content ... patterns of soil water content in dehesas in order to characterise the pattern of wa-ter consumption of trees, particularly during the summer, and (iii) to determine the nature of tree-grass interactions...

Báo cáo lâm nghiệp: "Eﬀects of resource availability on condensed tannins and nitrogen in two Quercus species diﬀering in leaf life span" doc

... Available online at:c INRA, EDP Sciences, 2007 www.afs-journal.orgDOI: 10.1051/forest:2007021Original articleEﬀects of resource availability on condensed tannins and nitrogen in two Quercus species ... radiation), at two water regimes (500 and 800 mm) and with two nutrient availabilities(standard substrate and 7% increase in soil N). The concentrations of soluble condensed tannins (CT) and nitrogen ... A., Nitsan Z., Eﬀect of daily supplementation of polyethylene glycol on intake and di-gestion of tannin-containing leaves (Quercus calliprinos, Pistacialentiscus and Ceratonia siliqua) by goats,...

Báo cáo lâm nghiệp: "Spatial dynamics of late successional species under Pinus nigra stands in the northern Apennines (Italy)" pps

... results of the spatial analysis of late- successional species regeneration in three plots of artificial Pinus nigra stands in the northern Apennines. For each species forming NR we describe both point ... 669679â INRA, EDP Sciences, 2005DOI: 10.1051/forest:2005059Original articleSpatial dynamics of late successional species under Pinus nigra stands in the northern Apennines (Italy)Giustino TONONa*, ... account for the supremacy of this species in the understorey environment of Pinus nigra stands [12, 23, 45]. The presence of Castanea sativa and Picea abies saplings in the understorey of plot 1...

Báo cáo lâm nghiệp: "Environmental control of CO assimilation rates 2 and stomatal conductance in five oak species growing under field conditions in Greece" ppsx

... efficiency and CO 2 compensation pointassociated with midday stomatal closure and mid-day depression of net CO 2 exchange of leaves of Quercus suber. Planta 1 62, 193 -20 3Tenhunen ... patterns in forest stands of lobolly pine (Pinus taeda L). In: Abstract collection of the international workshop onEcophysiology and Genetics of Trees and Forest in a Change Environment, ... during summer drought in leaf CO 2 uptake rates in macchia shrubs growing in Por-tugal: limitation due to photosynthetic capacity car-boxylation efficiency and stomatal conductance. ...

Báo cáo lâm nghiệp: " The role of glutamine synthetase, glutamate synthase and glutamate dehydrogenase in ammonia assimilation by the mycorrhizal fungus Pisolithus tinctorius" ppt

... The role of glutamine synthetase, glutamate synthase and glutamate dehydrogenase in ammonia assimilation by the mycorrhizal fungus Pisolithus tinctoriusJ.L. KershawG.R. ... inhi-bition by MSX. The increase in the glutamate pool appeared to indicate assi-milation of ammonia into glutamate by GDH activity.Inhibition of glutamate synthase by aza-serine ... noincorporation of ammonia into glutamate Ammonia was assimilated primarily into the amide of glutamine by the activity of GS, and transferred to glutamate- amino by glutamate synthase...

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