Báo cáo lâm nghiệp: "The allometric model in the stand density management of Pinus pinaster Ait in Portugal" ppsx
Báo cáo lâm nghiệp: "The allometric model in the stand density management of Pinus pinaster Ait. in Portugal" ppsx
... between these variables linkingtogether 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, 2005DOI: 10.1051/forest:2004077Original article The allometric model in the stand density management of Pinus pinaster Ait. in PortugalJaime F. SALES ... derive the self-thinning line and second, determine the limits for the optimum growth -density interval [19, 24] and for the crown closure line. The application of the linearized allometric model...
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Báo cáo lâm nghiệp: "Décomposition de la croissance en hauteur du pin maritime (Pinus pinaster Ait.) Variabilité géographique des composantes morphogénétiques et phénologiques" pdf
... nnalysis of height growth, compensa/ion betrreen co!iil)oiieiiisand 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 cytohistologicalzonation in apical meristems of seedlings of two contrasting open-pollinated jack pine (Pinus b(iiiksiiiii(l L.) families. ... to the apical meristem. The objective is the search of components that contribute for the most part to the resultant character. The method isthen applied to nine provenances...
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Báo cáo lâm nghiệp:"Poplar plywood resistance to wood decay agents: efficacy of some protective treatments in the light of the standard ENV 12038" ppt
... to be the combination of surface protectionwith edge painting. The attempt to quantify the level of degra-dation of the plywood by rot agents determining the residualshear strength of the glue ... painting did notlead to a significant improvement in the level of protectionthan the resin coating alone. According to the results obtainedon the test pieces inoculated with C. puteana, the ... few years, but then, dueto the leaching of the phenolic component decrease over time.Analyzing the different plywood protections, the combination of resin coating and edge painting did not lead...
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Báo cáo lâm nghiệp:"Individual-tree growth and mortality models for Scots pine (Pinus sylvestris L.) in north-east Spain" docx
... 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 siteindex 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 the stand increases the height differences ... number of trees per hectare in a stand (Eq. (3)). The R2 value was 0.97, with an RMSE of 0.003(table III). According to the model, the better the site the higher the stocking level of the stand...
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Báo cáo lâm nghiệp: " A state-space approach to stand growth modelling of European beech" pot
... hypothesis of the location of peakgrowth varying with site quality, stand density, or height wasnot 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 weremanaged according to the thinning strategy typical at the time. In the majority of plots, all ... of the negative estimates of α3and β3, the resulting growth curvebeing sigmoid. The estimate of α4indicates a positive response of dom-inant height growth to increasing levels of stand density (Fig....
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Báo cáo lâm nghiệp: "A growth model for Pinus radiata D. Don stands in north-western Spain" doc
... 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, regardlessits thinning history. Therefore, the thinning effect is built into the model, in ... subset of 155 of the initially established plots was re-measured in the win-ter of 1998. Following similar criteria, a subset of 46 of the twice-measured plots were measured again in the winter of...
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Báo cáo lâm nghiệp: "Salicylic acid up-regulates the expression of chloroplastic Cu, Zn-superoxide dismutase in needles of maritime pine (Pinus pinaster Ait.)" pptx
... of the tree clearly established the P. pinaster deducedprotein 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 METHODS2.1. Plant material and growing conditions Pinus pinaster seedlings were grown in a culture ... [4]. The extracellular location of this isoform in Scots pine is possiblyrelated to the transmission of systemic signal in wounding or in pathogen responses [13]. In this work, the effect of SA...
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Báo cáo lâm nghiệp: "Relationships between hydraulic traits and habitat preference for six Acer species occurring in the French Alps" pptx
... by increasing theirresistance 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 ... determiningdrought tolerance in plants [30]. Catastrophic xylem dysfunc-tion occurring through the entire xylem results in the death of the plant [29]. Consequently, studying the differences in the hydraulic ... in the low mountain stand (La Bastille, closed symbols). ForA. monspessulanum, three individual trees in the mountain stand were compared with a tree of the wet site (closed symbols). The linear...
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Báo cáo lâm nghiệp: "Ophiostomatoid fungi associated with the spruce bark beetle, Ips typographus, in three areas in France" docx
... spruce trees in these areas.Pheromone trapping, although done only in Vosges, showeddeclining population size already during the year of beetle sam-pling. Thus in the present study the isolated ... Ophiostoma species. There was novisible staining on any of the control inoculations, and noophiostomatoid fungi were detected in the control inoculations. When the frequencies of nine ophiostomatoid ... [7]. The bolts were brushed and the sur-faces wiped with 70% alcohol. To prevent drying, the ends of the boltswere dipped in melted paraffin. Then 25 beetles were introduced indi-vidually into...
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Báo cáo lâm nghiệp: "Ecophysiological factors contributing to the distributions of several Quercus species in the intermountain west" docx
... andWullstein, 1985), the absence of summerrain on a predictable basis would then leadto the loss of Q turbinella from the northernhabitats 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 lowestwinter and spring air temperatures of the previous ... 1966; Maze, 1968). The focus of this paper is to examineaspects of the water relations of these threeoak species native to the intermountain westand of their hybrids under...
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