Báo cáo lâm nghiệp: "Reconstructing crown shape from stem diameter and tree position to supply light models. I. Algorithms and comparison of light simulations" doc
Báo cáo lâm nghiệp: "Contribution to knowledge of Hylesinus fraxini (Panzer, 1779) (Coleoptera: Scolytidae) natural enemies from Northern Moravia (Czech Republic)" pdf
... 53JOURNAL OF FOREST SCIENCE, 53, 2007 (Special Issue): 53–56Contribution to knowledge of Hylesinus fraxini (Panzer, 1779) (Coleoptera: Scolytidae) natural enemies from Northern Moravia (Czech ... recorded. e most abundant parasitoid was Eurytoma morio Boheman, 1836 (44.1% from the total number of all reared parasitoids; 23.8% of the total mortality), subsequently Eurytoma arctica omson, 1876 ... predators; parasitoids; natural enemies; bark beetles; Hylesinus fraxini; anasimus formicarius; Cheiro- pachus quadrum; Eurytoma morio; Eurytoma arctica; Czech Republic; Central EuropeHylesinus...
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Báo cáo lâm nghiệp: "Rodent-caused damage to forest trees from the viewpoint of forestry practice" potx
... QH72075.Rodent-caused damage to forest trees from the viewpoint of forestry practiceJ. K1,2, K. T2, M. H1, E. B2 1Institute of Vertebrate Biology, Academy of Sciences of the Czech ... management. is corresponds to the comparison of damage caused by rodents and damage due to other harmful factors. Most of the foresters (over 80%) regard the damage by small mammals as less ... according to the foresters. However, this opinion concerning the significance of the individual species is in contradic-tion with the information the foresters provided on the distribution of damage...
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Báo cáo lâm nghiệp: "Improving RBS estimates – effects of the auxiliary variable, stratification of the crown, and deletion of segments on the precision of estimate" pps
... variables, the stratification of the crown and the deletion of segments. In the present study, the effects of the choice of the auxiliary variable and of the created crown structure (segments and nodes, ... dele-tion of the stem segments. After this closer look at the old pine, the effect of stratification and deletion of the stem segments on the precision of estimates is to be studied for all trees of ... e analysis of the effects of the crown structure concentrates on the stratification of the crown and on the deletion of greater segments (e.g. the stem) by using the classical RBS. Statistical...
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Báo cáo lâm nghiệp: "Effects of drainage treatment and stand growth on changes in runoff components from a forested watershed" pps
... Hydrotechnical meliorations. Drainage channels. Praha, ČSNI 1993. (in Czech) Drainage (1973): Principles and applications. Part II – eo-ries of drainage and watershed runoff. Wageningen, Interna-tional ... based on the expansion and shrinkage of variable source areas and consequent changes in a drainage network during a discharge event. e runoff investigation was carried out in a forested watershed ... precipitation minus interception, in ltration, evaporation and storage losses (H 1988; K 1996).First, the effects of drainage treatment and stand growth on changes in runoff were analyzed...
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Báo cáo lâm nghiệp: "Different technologies of floodplain forest regeneration from the aspect of soil changes" pot
... preparation of soil/ site by ploughing, the concentrations of nitrogen and carbon slightly decrease as a result of mixing the soil of the upper horizon with the central part of the soil profile.– ... guidelines for the realization of the above-mentioned project.CONCLUSION– The natural regeneration of oak in floodplain forests of Spačva protects the soil from dramatic changes in soil in such ... is is confirmed by the results from the Lednice locality (participation of ash). e higher the number of plant species in the stand, the more complex the impact on the soil they exert (P...
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Báo cáo lâm nghiệp: "Stability of Norway spruce (Picea abies [L.] Karst.) stands in the Beskid Śląski and Beskid Żywiecki Mts. from the aspect of their nutrition status" pptx
... determine the stability of spruce stands in the areas of threat to forest stability in the Beskid Śląski and Beskid Żywiecki Mts. in the light of their nutrition. In 2002 samples of soil and of ... Beskid Śląski Mts.; Beskid Żywiecki Mts.; Southern Poland 42 J. FOR. SCI., 54, 2008 (2): 41–48VIII, Province 1 of the Beskid Śląski Mts. and Beskid Mały Mts. and partly in Province 4 of the ... regionalization of Poland (T et al. 1990), the area of the present research is located in Carpathian Region Stability of Norway spruce (Picea abies [L.] Karst.) stands in the Beskid Śląski and Beskid...
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Báo cáo lâm nghiệp: "Findings from the application of coal combustion by-products (CCB) for forest reclamation on spoil banks of the North Bohemian Brown Coal Basin" pdf
... stand composition) from each taxon used for the reforestation of the state of reclamation “A” and “B” Fig. 3. Fraxinus excelsior L. in the treatment with the application of CCBFig. 4. Populus ... L. in the treatment with the application of CCBFig. 5. Tilia cordata Mill. and Pinus nigra Arn. in the treatment with the application of CCBFig. 6. Deformations of the root system in the used ... in connection with the soil conditions created by reclamation. Based on the performed leaf analyses the deter-mined differences in element contents between the evaluated reclamation variants...
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Báo cáo lâm nghiệp: "Plant community variability within potential natural vegetation units: a case study from the Bohemian Karst" docx
... SP/2d2/138/08.Plant community variability within potential natural vegetation units: a case study from the Bohemian KarstP. Š, K. P, P. USilva Tarouca Research Institute for Landscape and Ornamental ... similarly broad distribution.DISCUSSIONActual vegetation based on the map of potential natural vegetation The stratification of this locality according to units from the PNV map only partly ... Great Britain. Bulletin 124. Edinburgh, Forestry Commission: 74.RICOTTA C., CARRANZA M.L., AVENA G., BLASI C., 2002. Are potential natural vegetation maps meaningful alternative to natural...
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Báo cáo lâm nghiệp: "Comparison of morphological and physiological parameters of the planting material of Norway spruce (Picea abies [L.] Karst.) from intensive nursery technologies with current bareroot plants" ppt
... outplanting (G 1982; M 1982; A 1983; D, O- 1990; W 1990).Comparison of morphological and physiological parameters of the planting material of Norway spruce (Picea ... evaluated the growth of different types of planting material in the first years after outplanting to a mountain locality. MATERIAL AND METHODSPlantable plants of Norway spruce from the 8th ... outside from the root ball to the adjacent soil.It follows from the above results that many spe-cialized papers compared container and bareroot planting material with respect to the growth of...
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Báo cáo lâm nghiệp: "A linkage among whole-stand model, individual-tree model and diameter-distribution model" ppsx
... three broad categories: whole-stand models, individual-tree models, and diameter-distribu-tion models (M 1974). Whole-stand models are models that use the stand as a modelling unit (C ... ABSTRACT: Stand growth and yield models include whole-stand models, individual-tree models and diameter-distri-bution models. In this study, the three models were linked by forecast combination and ... 600–608JOURNAL OF FOREST SCIENCE, 56, 2010 (12): 600–608A linkage among whole-stand model, individual-tree model and diameter-distribution model X. Z, Y. LResearch Institute of Forest Resource...
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Báo cáo lâm nghiệp: " Crown architecture and leaf habit are associated with intrinsically different light-harvesting efficiencies in Quercus seedlings from contrasting environments" ppt
... 511c INRA, EDP Sciences, 2006DOI: 10.1051/forest:2006033Original article Crown architecture and leaf habit are associated with intrinsically different light-harvesting efficiencies in Quercus seedlings ... 37–39]. In agreement with this, we observed thelowest mean and total leaf areas in seedlings of Mediterraneanoaks (Fig. 3). The reduction in the mean area of individualleaves resulted in a non-linear ... that contrasting morphologies are asso-ciated with contrasting light harvesting efficiencies in species from different provenance environments due to the different selective pressures operating on...
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Báo cáo lâm nghiệp: "Reconstructing crown shape from stem diameter and tree position to supply light models. I. Algorithms and comparison of light simulations" doc
... Crown reconstruction algorithms Two algorithms were developed to reconstruct crown radii for each tree from tree position, stem diameter, total tree height, crown baseheight and equivalent crown ... thefollowing to calculate stem diameter: – The max stem diameter of the clump, for prediction of total height and crown length. – The equivalent stem diameter, calculated as the diameter of a stem whose ... tree were total tree height, crown base height and crown radii. Allometric relations weredevelopped to relate these variables to stem diameter. We directly predicted total height from stem diameter. ...
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Báo cáo lâm nghiệp:"Estimation of crown radii and crown projection area from stem size and tree position" pps
... 10.1051/forest:2003031Original articleEstimation of crown radii and crown projection area from stem size and tree positionRüdiger GROTE*Chair for Forest Yield Science, Department of Ecology and Landscape Management, ... determination of radius length and potential crown cover (pr1 and pr2: maximum radii, alin1 and blin1:linear radii estimation, alog and blog: logarithmic crown area estimation, alin1 and blin2: linear crown ... values derived from eithermeasured or simulated crown radii. Additionally, crown over-lap is calculated from the difference between the sum of single tree crown projection areas and canopy cover....
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Báo cáo lâm nghiệp: "Within-crown variation in leaf conductance of Norway spruce: effects of irradiance, vapour pressure deficit, leaf water status and plant hydraulic constraints" ppt
... 419429â INRA, EDP Sciences, 2004DOI: 10.1051/forest:2004035Original articleWithin-crown variation in leaf conductance of Norway spruce: effects of irradiance, vapour pressure deficit, leaf water ... sprucedepending on the level of irradiance and vapour pressure def-icit; (2) assess the contribution of the leaf water status and liquidphase conductance to the control of leaf conductance in relationto ... perturbations of liquid water transport [19].4.3. Leaf conductance modelThe model developed from the data obtained in 1997,accounting for the interactive effects of irradiance, VPD, and plant hydraulic...
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Báo cáo lâm nghiệp: "Xylem acoustic signals from mature Pinus sylvestris during an extended drought" pptx
... standard error, n = 4. 1Ann. For. Sci. 61 (2004) 18â INRA, EDP Sciences, 2004DOI: 10.1051/forest:2003079Original articleXylem acoustic signals from mature Pinus sylvestris during an extended ... Ikedaand Ohtsu [12] on 6-year-old Pinus thunbergii, and, (2) Jacksonet al. [16] on a 39 year old Pinus sylvestris. In the present study,significant acoustic emissions in the branches began when ... et al. from outside through the pit membrane pores. The air-seedinghypothesis, has been verified experimentally [33] and thisprocess is accompanied by an acoustic pulse, resulting from an abrupt...
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