Báo cáo lâm nghiệp: "A flexible radial increment model for individual trees in pure even-aged stands" pdf

... 327–335 © INRA, EDP Sciences, 2004 DOI: 10.1051/forest:2004026 Original article A flexible radial increment model for individual trees in pure even-aged stands Christine DELEUZE a *, Olivier PAIN a , ... various individual growth models for trees in pure and even-aged stands, a generic model with a form parameter according to each species is proposed. With a...

Ngày tải lên: 08/08/2014, 01:21

... to model the response due to thinning. It is assumed that any formulation to take into account the effect of thinning must include the thinning intensity, the stand age at the time of thinning ... function, For. Sci. 34 (1988) 790–797. [7] Calama R., Cañadas N., Montero G., Inter-regional variability in site index models for even-aged stands of stone pine (Pinus pinea L.) in Spain,...

Ngày tải lên: 08/08/2014, 00:22

... mortality model for Pinus radiata 441 or logit function is the most widely used in mortality models for stands or individual trees [1, 10, 11, 16, 25, 26, 39, 40]. The logistic model is formulated ... or stand density increase and it increases when the value of the relative spacing index increases (e.g., with inten- sive thinnings). The influence of these variables was shown in...

Ngày tải lên: 08/08/2014, 01:21

... y-axis: stem area increment ∆G (cm 2 yr –1 ). Influence of model parameters on the [ShX] model for the profile of stem area increment. Thick line: predicted stem area increment for model ShX with ... and high thinning intensity, (“s2”) high productivity and low thinning intensity, (“s3”) low productivity and high thin- ning intensity, (“s4”) low productivity and low thinning in...

Ngày tải lên: 08/08/2014, 14:20

... observed in the stands resulted in a de- crease in tree vitality, infestation by bark beetle and finally in the mortality of trees (M 1967). As the region concerned is under a long-lasting in uence ... samples in the case of Cd and Zn in the whole country. e results of needle analyses conducted in Nor- way spruce stands on old spoil banks in the Black Forest (Schwar...

Ngày tải lên: 07/08/2014, 10:21

... height models exist for ponderosa pine. Dolph [7] developed models that estimate height increment for younger trees from site index and other variables, most importantly diameter increment. These models ... as that for model (5). Therefore, I recommend the use of model (4) for estimating the height of ponderosa pine in British Columbia. The models cannot be algebraically in...

Ngày tải lên: 08/08/2014, 01:22

... the deviation explained by the model (D 2 ) is 0.49. Model for vegetation tiers e model for vegetation tiers in which elevation was included as the independent variable explains 78% of variability ... vegetation, and in addi- tion, it includes the in uence of slope steepness and possibly other variables (terrain shading, latitude). Relatively simple formulae for radiati...

Ngày tải lên: 07/08/2014, 10:21

... clustering for large scale class-based language modeling in machine translation. In ACL-HLT. S. Vogel, H. Ney, and C. Tillmann. 1996. HMM-based word alignment in statistical translation. In COLING. P. ... models into a self-contained component in the translation decoder. 3 Inference during Translation Decoding Scoring the agreement model as part of translation decoding requires...

Ngày tải lên: 16/03/2014, 19:20

... of radial increment [4, 18, 27]. They are in fact negatively correlated i.e. higher ring wood densities are associated to smaller radial increments : . Evidences of this inverse relationship for ... and forest habitat type, For. Sci. 30 (1984) 943–965. [23] Mörling T., Evaluation of annual ring width and ring density deve- lopment following fertilisation and thinning of Scots pine...

Ngày tải lên: 08/08/2014, 01:22

... as dominant species in the herb stratum. ere were two lines of traps led in a trees cropping mast oak forest, one line in a young oak stand, one in a spruce forest, one in a pine forest ... oak forest, one line in a mixed forest (Quercus sp., Tilia sp., Carpinus sp., Acer sp.), one in a locust stand and one at an oak forest edge. Each line con- sisted of 20 snap traps, t...

Ngày tải lên: 07/08/2014, 03:22