Báo cáo lâm nghiệp: "Interactive effects of phosphorus and light availability on early growth of maritime pine seedlings" pptx

... vertical and horizontal bar indi-cates the standard error of the mean. Effects of phosphorus and light on early growth of maritime pine 577density (PPFD) at the top of the seedlings was 120–180 and ... TXTN+()2 Tb–∑= Effects of phosphorus and light on early growth of maritime pine 5814. DISCUSSIONOur results reveal the occurrence of a complex interactionbetween phosphorus and light. At the ... response of early growth of maritime pine seedlings to combined levels of light and phosphorus. Seedlings weregrown under three levels of phosphorous availability, i.e., two relative addition...

Báo cáo lâm nghiệp: "Interactive effects of irradiance and water availability on the photosynthetic performance of Picea sitchensis seedlings: implications for seedling establishment under different management practices" ppt

... limited and waterlogged conditions [9, 27]. Photosynthesis would alsobe inhibited due to the increased participation of competingpathways and consumption of electrons and reductant in non-photosynthetic ... Zeaxanthin and heat dissipation of excess light energy in Nerium oleander exposedto a combination of high light and excess light energy, Plant Phy-siol. 87 (1988) 17–24.[9] Epron D., Dreyer ... proportion of photonspartitioned to PSII and Io is the incident irradiance.The proportion of electrons that are dissipated through processesother than photosynthetic carboxylation of RuBP...

Báo cáo lâm nghiệp: "an Phytophthora quercina have a negative impact on mature pedunculate oaks under ﬁeld conditions" pptx

... pol-lution on forests, 4th ed., United Nations Economic CommissionImpact of P. quercina on mature oaks 671for Europe Convention on Long-range Transboundary AirPollution: International Co-operative ... exception was the concentration of P and the ratio between P and N, which were somewhatlow in most trees. The low concentration of P in leaves, thesigniﬁcant diﬀerence in the leaf concentration of ... from one of the Phytophthora-infested stands deviated considerably from the rest of the N concentrations and this stand was therefore removed;values are therefore based on 4 stands.infection....

Báo cáo lâm nghiệp: "The effects of flooding and Phytophthora alni infection on black alder" pps

... test).RESULTS AND DISCUSSIONConfirmation of flooding and P. alni infection effects on black aldere analysis of covariance confirmed that the both factors (flooding and P. alni infection) and their ... flooding and non-flooding condition was Table 1. e effect of long-term flooding and Phytophthora alni infection on the development of black alder saplings Treatment per valid NLength of necrosis ... collars and basal portions of the stems were thickened, apparently as a result of the formation of a higher proportion of aerenchyma tis-sues. e lenticels on the collars, bases of stems and roots...

Báo cáo lâm nghiệp: " The effects of cutting regimes on natural regeneration in submountain beech forests: species diversity and abundance" pdf

... on the amount of beech seedlings (principal woody plant) in natural regeneration. A significant influ-ence of two principal climatic variables (moisture and light conditions) on the growth and ... open-canopy conditions was Table 4. Results of Pearson’s correlation describing a relation between the number of beech, hornbeam, fir, oak, linden and sycamore seedlings and the number of fructifying ... abundance of individuals older than one year was also significantly dependent on the stand density and LAI.DISCUSSIONe irregular fructification of beech trees may cause problems in connection with...

Báo cáo lâm nghiệp: "Interactive eﬀects of drought and pathogens in forest trees" docx

... latent pathogen of red pine seedlings,New Phytol. 149 (2001) 531–538.[188] Sury R. von, Fluckiger W., Eﬀects of air pollution and water stress on leaf blight and twig cankers of London planes (Platanus ... and standsunder drought: a review of ecophysiological responses, adaptationprocesses and long-term consequences, Ann. Sci. For. 63 (2006)623–642.[30] Britton K.O., Anthracnose infection of ... P., Spread of Armillaria spp. and Heterobasidion annosum in Norway spruce exposed to drought,irrigation and fertilization, Proc. of the 8th Int. IUFRO conf. on root and butt rot of forest trees,...

Báo cáo lâm nghiệp: " Differential effects of N, P and K on photosynthesis and partitioning of N in Pinus pinaster needles" pptx

... fertilization on growth of Douglas-fir: relative contribution of foliage quantity and efficiency,Can. J. For. Res. 13 (1983) 167–175.[10] Brix H., Ebell L.F., Effects of nitrogen fertilization on growth, ... species. Of the fewstudies on conifers, none have included direct quantification of Rubisco. Previously we reported relationships among addition of P fertiliser, growth, and photosynthesis of P. ... lasting role of Amax in the growth response. Concentrations of N, P, and K were maintainedwithin a relatively small range, and there was no correlationbetween Amax and concentrations of N, P,...

Báo cáo lâm nghiệp: "The effects of thinning on the structural diversity of coppice forests" doc

... ways of calculating measures of diversity.Furthermore, any diversity determination is relative to the con-ditions of the area concerned. Considering the growing condi-tions of central and southern ... implementation of direct and indirect production uses for these stands (silvo-pastoral uses, recreation, environmental preservation), there isan urgent need to study and manage these coppice stands. ... con-centrates growth on standing trees and should result in openwoodlands where cattle grazing is the main use. In the longterm, openings improve crown development and acorn produc-tion and...

Báo cáo lâm nghiệp: "The effects of lifting on mobilisation and new assimilation of C and N during regrowth of transplanted Corsican pine seedlings. A dual 13C and 15N labelling approach" docx

... increasestrongly risks of degradation of water potential and C and Nacquisition on the site of installation, and compromise success-ful plantation establishment in the field. REFERENCES[1] Andersen ... beginning of root regeneration(day 13), and on days 27 and 41. The significance of the effects of lifting and time and their interaction are indicated for the different variables;ns, non significant; ... limitation could be indirectly generatedlater in the growing season if the growth unbalance generatedTable II. Effects of lifting and time on changes in content and partitioning of total, old and...

Báo cáo lâm nghiệp: "The effects of elevated CO 2 and water stress on whole plant CO 2 exchange, carbon allocation and osmoregulation in oak seedlings" docx

... 1988; Chaves and Pereira, 1992; Tschaplinski et al, 1993;Tyree and Alexander, 1993).Under drought conditions, osmotic adjust-ment on the one hand and growth and metabolic ... carbon supply to the dif-ferent plant components and increasedorganic solute concentrations. However,elevated CO2 concentrations often lead toreduced total mineral ion concentrations ... carbon dioxideconcentration (700 ± 50 μmol mol-1 CO2), and were watered weekly. The CO2 control and mon-itoring system as well as the growth conditionshave...

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