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

... 53 JOURNAL OF FOREST SCIENCE, 53, 2007 (Special Issue): 53–56 Contribution 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 mortal...

Ngày tải lên: 07/08/2014, 03:22

... QH72075. Rodent-caused damage to forest trees from the viewpoint of forestry practice J. K 1,2 , K. T 2 , M. H 1 , E. B 2 1 Institute 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...

Ngày tải lên: 07/08/2014, 03:22

... 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 seg...

Ngày tải lên: 07/08/2014, 03:22

... 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...

Ngày tải lên: 07/08/2014, 03:22

... 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 protect...

Ngày tải lên: 07/08/2014, 03:22

... 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): 41–48 VIII, Province 1 of the Beskid Śląs...

Ngày tải lên: 07/08/2014, 10:21

... 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 CCB Fig. 4. Populus ... L. in the treatment with the application of CCB Fig. 5. Tilia cordata Mill. and Pinus nigra Arn. in the treatment with the application of CCB Fig. 6. Deform...

Ngày tải lên: 07/08/2014, 10:21

... SP/2d2/138/08. Plant community variability within potential natural vegetation units: a case study from the Bohemian Karst P. Š, K. P, P. U Silva Tarouca Research Institute for Landscape and Ornamental ... similarly broad distribution. DISCUSSION Actual vegetation based on the map of potential natural vegetation The stratification of this...

Ngày tải lên: 07/08/2014, 10:22

... 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 METHODS Plantable...

Ngày tải lên: 07/08/2014, 10:22

... 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 fore...

Ngày tải lên: 07/08/2014, 10:22

... 511 c  INRA, EDP Sciences, 2006 DOI: 10.1051/forest:2006033 Original 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 the lowest mean and total leaf areas in seedlings of Mediterranean oaks (Fig. 3). The reduction in...

Ngày tải lên: 07/08/2014, 16:20

... Crown reconstruction algorithms Two algorithms were developed to reconstruct crown radii for each tree from tree position, stem diameter, total tree height, crown base height and equivalent crown ... the following to calculate stem diameter: – The max stem diameter of the clump, for prediction of total height and crown length. – The equivalent s...

Ngày tải lên: 08/08/2014, 00:22

... 10.1051/forest:2003031 Original article Estimation of crown radii and crown projection area from stem size and tree position Rüdiger 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, al...

Ngày tải lên: 08/08/2014, 01:21

... 419429 â INRA, EDP Sciences, 2004 DOI: 10.1051/forest:2004035 Original article Within-crown variation in leaf conductance of Norway spruce: effects of irradiance, vapour pressure deficit, leaf water ... spruce depending on the level of irradiance and vapour pressure def- icit; (2) assess the contribution of the leaf water status and liquid phase...

Ngày tải lên: 08/08/2014, 01:21

... standard error, n = 4. 1 Ann. For. Sci. 61 (2004) 18 â INRA, EDP Sciences, 2004 DOI: 10.1051/forest:2003079 Original article Xylem acoustic signals from mature Pinus sylvestris during an extended ... Ikeda and Ohtsu [12] on 6-year-old Pinus thunbergii, and, (2) Jackson et al. [16] on a 39 year old Pinus sylvestris. In the present study, significant acoustic emissions...

Ngày tải lên: 08/08/2014, 01:22