Báo cáo lâm nghiệp: "The allometric model in the stand density management of Pinus pinaster Ait in Portugal" ppsx

... between these variables linking together the two branches, belongs to neither of them; it con- stitutes the core of ecology [43]. * Corresponding author: jfsl@utad.pt Management of Pinus pinaster in ... Sci. 61 (2004) 807–814 © INRA, EDP Sciences, 2005 DOI: 10.1051/forest:2004077 Original article The allometric model in the stand density management of Pinu...

Ngày tải lên: 08/08/2014, 01:22

... nnalysis of height growt h, compensa/ion betrreen co!iil)oiieiiis and season« I stability of shoot eloiigaiioii in maritime pine (Pinus pinaster Ait. ). Pro- ceedings of the I.U.F.R.O. ... relative growth rates and variation of cytohistological zonation in apical meristems of seedlings of two contrasting open-pollinated jack pine (Pinus b...

Ngày tải lên: 09/08/2014, 06:21

... to be the combination of surface protection with edge painting. The attempt to quantify the level of degra- dation of the plywood by rot agents determining the residual shear strength of the glue ... painting did not lead to a significant improvement in the level of protection than the resin coating alone. According to the results obtained on the test pieces in...

Ngày tải lên: 08/08/2014, 01:21

... at the self-thinning limit (figure 3). The influence of site quality on the intercept of the self-thinning line was examined by adding the site index to the model as an independent variable. The ... (2)). Due to the form of equation (2), the height of a tree with dominant diameter is equal to the dominant height of the stand. Furthermore, when the age of...

Ngày tải lên: 08/08/2014, 01:21

... hypothesis of the location of peak growth varying with site quality, stand density, or height was not supported. The effects of thinnings were modelled solely through the effect of the reduction in ... managed according to other thin- ning strategies, such as group- or selection-thinning and others were managed according to the thinning strategy typical at the time. In...

Ngày tải lên: 07/08/2014, 16:21

... According to this basic structure, the whole -stand model requires five stand- level inputs for simulation: the age of the stand at the beginning and the end of the projection interval, and the initial ... initial age provided sufficient information about the future trajectory of the basal area of the stand, regardless its thinning history. Therefore, the thi...

Ngày tải lên: 07/08/2014, 16:21

... of the tree clearly established the P. pinaster deduced protein within the chloroplastidic Cu,Zn-SODs, yet indicating the natural divergence from all angiosperm species in the clade (the P. pinaster ... studied in what concerns the chloroplastic form of Cu,Zn-SOD from Pinus pinaster. 2. MATERIALS AND METHODS 2.1. Plant material and growing conditions Pinus pin...

Ngày tải lên: 08/08/2014, 01:22

... by increasing their resistance to cavitation [13], one of the major causes of decline in the botanical species in the absence of water [5]. In contrast, Acer species are more restricted to their ... determining drought tolerance in plants [30]. Catastrophic xylem dysfunc- tion occurring through the entire xylem results in the death of the plant [29]. Consequently...

Ngày tải lên: 08/08/2014, 01:22

... spruce trees in these areas. Pheromone trapping, although done only in Vosges, showed declining population size already during the year of beetle sam- pling. Thus in the present study the isolated ... Ophiostoma species. There was no visible staining on any of the control inoculations, and no ophiostomatoid fungi were detected in the control inoculations. When the fre...

Ngày tải lên: 08/08/2014, 01:22

... and Wullstein, 1985), the absence of summer rain on a predictable basis would then lead to the loss of Q turbinella from the northern habitats if they are not able to maintain ... in the Cottam Oak Grove at the Uni- versity of Utah for approximately 30 years, and during that interval some of the lowest winter and spring air temper...

Ngày tải lên: 08/08/2014, 18:21