Báo cáo lâm nghiệp: "The effects of stock type and radicle pruning on blue oak morphology and field performance" docx

... survival of the three treat-ments, averaged over stock types, variedby 1% or less (table II).Short noteThe effects of stock type and radicle pruning on blue oak morphology ... ten rows of nine seedlings each.Each row contained one randomly positionedseedling from each of the nine treatment combi-nations (three stock types x three pruning treat-ments).In ... trimming off part of the radicle of germinated blue oak acornsprior to planting has little or no influence on field performance of either directly sownacorns or container...

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 ... growth, secondary stem base thickening, hypertrophy of lenticels on the stems, development of adventitious roots and necrosis development. In addition, the distribution and amount of root and actinorrhiza...

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

... 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 ... Proportions of woody plant species from the parent stand and of other woody plants in relation to seedlings older than one year. White numbers correspond to the (percent) proportions of beech...

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. ... transformation L(d) of Ripley’s function K(d). Solid lines: K function value for the realdistribution of trees; grey lines: 90% confidence interval boundaries of L(d) for a Poisson distribution....

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 ... content of whole seedlings and of old roots (Fig. 4 and Tab. II). In contrast, lifting had no effect on N content of needles and old stem. The N content of new com-ponents, and particularly new roots, ... beginning of root regeneration (day 13), and on days27 and 41. The significance of the effects of lifting and time and theirinteraction are indicated for the different variables; ns, non signifi-cant;...

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

... between350 and 700 μmol mol-1 CO2 concentra-tions under well-watered conditions (fig 3).The lack of a stimulation of A reflects a long-term downward acclimation of photosyn-thetic ... carbon supply to the dif-ferent plant components and increasedorganic solute concentrations. However,elevated CO2 concentrations often lead toreduced total mineral ion concentrations ... 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...

Báo cáo lâm nghiệp: "The effects of transplanting stress on photosynthesis, stomatal conductance and leaf water potential in Cedrus atlantica Manetti seedlings: role of root regeneration" pdf

... regen-eration. Assimilation rate measurements and root observations (number of growing roots and root elongation) were made just before trans-planting (day 0) and then weekly ... evolu-tion of A and gs, the changes in Aweremainly due to an alteration of mesophyllphotosynthetic capacity.The effects of transplanting stress on photosynthesis,stomatal conductance ... C02assimilation and translocation (Stupendick and Shepherd, 1980), stomatal conduc-tance and plant water status (Sands,1984; Kaushal et al., 1987; Aussenac and El Nour, 198i3), considered...

Báo cáo lâm nghiệp: "The effects of summer exposure to ozone on the frost hardiness after the vegetation period of Norway and Sitka spruce seedlings" doc

... UKDepartment of the Environment, the Commis-sion of the European Communities, the NEForest Experiment Station of the USDA ForestService and the US Environmental ProtectionAgency, ... autoclaved and the total conductivity (C-) of the solution determined. Based on theassumption that the rate of leakage of electro-lytes from a detached shoot is controlled ... of the aboveequation and substitution of the measuredconductivity values, the rate of change inconductivity or normalised leakage rate (k) wascalculated. A comparison...

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 ... 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 ... scanner and their area determined using ScionImaging Software (Beta 4.0.1, Scion Corporation, Maryland, USA). 422 K. Black et al.[16] Hoff C., Rambal S., An examination of the interaction between...

Báo cáo lâm nghiệp: "The results of manipulated experiments with inoculation of Ips typographus (L., 1758) to spruce trees under various levels" potx

... Large area of such stands along with compound of biotic and abiotic stressors (air pollu-tion, degradation and compaction of soil, nutrients exhaustion, increased activity of pests and patho-gens) ... position on slope and on stressed versus unstressed trees;– analysis of I. typographus attacks rate and speed of boring on more stressed versus less stressed trees.METHODOLOGYe eﬀect of water ... stressed by elimi-nation of precipitation.Preparation of I. typographus males to experimentsAcquisition of wild individuals. To collect adults of I. typographus, 5 pheromone traps were installed...

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