Báo cáo lâm nghiệp: "Modelling stand basal area growth for radiata pine plantations in Northwestern Spain using the GADA" doc

... future trajectory of the stand basal area. It was therefore not necessary to con- sider the thinning effect in the dynamic model for projecting stand basal area in thinned stands. These results were ... develop a stand basal area growth system for radiata pine plantations in Galicia (northwestern Spain) . A stand basal area projection function...

Ngày tải lên: 07/08/2014, 16:21

... under the different silvicultural alternatives. The yield model was elaborated for Scots pine stands in northern Spain using 75 temporary plots from the Sec- ond National Forest Inventory of Spain. ... Continuous Cover Forestry, Kluwer Ac. Pub., 2002, pp. 123–134. [3] Bravo F., Montero G., Site index estimation in Scots pine (Pinus sylvestris L.) in the High Ebro Bas...

Ngày tải lên: 08/08/2014, 01:22

... effect of thinning must include the thinning intensity, the stand age at the time of thinning and the time since thinning [17, 25, 39, 61]. In this work, to consider the thinning effect, the term proposed ... selected and incorporated as a multiplier in model (2): (4) where T 1 is the effect of the thinning; G a and G b are the stand basal area after and befor...

Ngày tải lên: 08/08/2014, 00:22

... parameters of the function were related to other tree and stand features, but the form of the original function remained the same [13, 23]. The site index was defined using the height growth model for ... & Sons, Inc., 1980. [5] Calama R., Cañadas N., Montero G., Inter-regional variability in site index models for even-aged stands of stone pine (Pinus pinea L.)...

Ngày tải lên: 08/08/2014, 00:22

... NB(i) as the index number of a strip adjacent to the i-th strip against the pre- vailing wind. en, after completing the recursive operation four times – for the two-cut system – we have the following ... cut in two adjacent strips against the prevailing wind, this system creates a spatial forest structure that mitigates wind damage risk by gradually increasing average...

Ngày tải lên: 07/08/2014, 10:21

... conclusive for the BG and ICH zones due to a small number of plots in these zones. The BG zone is the driest in the province and the ICH zone is the one of the wettest and most productive in the province ... with the curves for the BG and ICH zones. Although the fit to the height trajectory for the plots in these zones was satisfactory, the resulting...

Ngày tải lên: 08/08/2014, 01:22

... cycle n according to the following algorithm: from the begin- ning of tree growth, we have in the law (4) for every GU, i.e. the stem cannot react; during cycles of growth, if the leaning angle of one ... vector at the origin and the extremity of the beam are denoted by and respectively, according to the definition (A.3). These vectors contain the displacements from...

Ngày tải lên: 08/08/2014, 01:22

... tested the sensitivity of the model to ga in the case of the oak stand using higher for LAI increasing from 1 to 6, for a fixed value of Rg = 500 W.m -2 . The case ... and model were observed in the morning and in the evening, probably due to a dehydration in the morning of the water exchangeable tissues of the trees (...

Ngày tải lên: 08/08/2014, 18:21

... that, in the former, leaves were generally inclined towards the ground, whereas in the coppice they were pointing upwards. The information about canopy structure and the response ... the leaf area displayed by the stand. The leaf area index (LAI) for the whole stand was 4.5, whereas for each average model tree, from the smallest...

Ngày tải lên: 09/08/2014, 04:20

... experimental stands are uniform within the whole research project being presented in detail in the initial paper in the journal Lesnictví-Forestry (K 1997). erefore, we can give only basic in- formation ... occurred in the stand. In the course of 42 years, the proportion of larch in this stand without planned thinning measures decreased to 35%. On the...

Ngày tải lên: 07/08/2014, 03:22