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

... capacity.The effects of transplanting stress on photosynthesis, stomatal conductance and leaf water potential in Cedrus atlantica Manetti seedlings: role of root regenerationJ.M. ... were main-tained at 20°C in order to promote root regen-eration. Assimilation rate measurements and root observations (number of growing roots and root elongation) were ... IndiaIntroductionArtificial forest stand establishment maybe achieved either with container-grownseedlings or with bareroot planting stock.Since growing seedlings in containersmay...

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

... group consisting of beech and willow. e results of ANOVA in Table 3 indicate a signiﬁ-cant in uence of diﬀerent cutting operations on the number of all regenerating individuals, of all indi-viduals ... positive on plot M only.Fig. 5 illustrates the in uence of cutting on changes in the species composition of natural regeneration in comparison with the parent stand. e more inten-sive the cutting ... seedlings and the number of fructifying trees, stand density, illumination in the growing season – GS (illumination account by S 1992), leaf area index (LAI), annual throughfall and throughfall...

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

... 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 combination significantly ... (2006) found that flooding during the growing season causes the highest risk of infection. e anaerobic conditions in flooded soil could in- hibit growth and lead to decay of the root system (K ... treat-ments compared to the non-flooded ones indicate a role for hypoxia.CONCLUSIONSe majority of the assessed criteria in the ex-periment, including the amount of biomass of all investigated plant...

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

... crown dimensions, vertical and horizontal differentiation and foliage height diversity. Moderate and heavy thinning have similar effects on stand structure, but the effects of light thinning are quite ... 756–775.[19] Montes F., Cañellas I., Río M.d., Montero G., The effects of silvi-culture on the structure of Scots pine stands in Spain, in: Procee-dings of Towards the sustainable use of Europe’s ... Analysis of the spatial pattern of trees in Q. pyrenaica plots (a, b and c: light thinning; d, e and f: moderate thinning; g, h and i: heavythinning; 3 plots for each thinning treatment) using the...

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

... mechanical handling disrupt thefunctional continuity between soil and roots, and cause root injuries with loss of fine roots, resulting in reduced water and nutrient absorption [21]. Lifting and transplanting ... stomatal conductance and leaf water potential in Cedrus atlantica Manetti seedlings: role of root regene-ration, Ann. Sci. For. 46s (1989) 464–468.[16] Guehl J.M., Garbaye J., Wartinger A., The effects ... Nitrogen content of seedlings and of their components, with theexception of needles, increased with time (Fig. 4 and Tab. II).Lifting caused a decrease in N content of whole seedlings and of old roots...

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

... drying cycle. At the end of the experiment,the water- stressed seedlings of both CO2 con-centration conditions displayed water use valuesamounting to 25% of the nonstressed ... INTRODUCTIONOsmoregulation, ie, the lowering of osmotic potential by the net increase in intracellularorganic and mineral solutes in response to water deficit, is one of the processes ... individual plantOriginal articleThe effects of elevated CO2 and water stress on whole plant CO2 exchange, carbon allocation and osmoregulation in oak seedlingsP VivinJM Guehl*A...

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

... dur-ing the course of the study using a combination of herbicides and mowing. Glyphosate was sprayed on the plot before the study began, and again in the early spring of ... including directly sownacorns, 4-month-old seedlings and 1-year-old seedlings. This project also examinedthe effects of trimming the radicles of ger-minated acorns on ... woodlands are alsoextremely important to water quality and yield - a subject of increasing publicscrutiny and concern - since a large per-cent of the state’s water originates...

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

... similar concentration of ozone usingthe same fumigation system. In this case,although there was no effect of the pollu-tant on the attainment of deep winter hard-iness, ... S02 + N02 pollution on the new season’sgrowth and water relations of Picea sitchensis.New Phytot. 1 O6, 225-237Heath R.L. (1980) Initial events in injury toplants by ... Mansfield TA.(1987) A large-scale fumigation system forinvestigating interactions between air pollution and cold stress on plants. Environ. Pollut. 43,15-28Lucas P.W., Cottam...

Báo cáo lâm nghiệp: "The influence of selected factors on energy requirements for plain milling of beech wood" ppsx

... aimed at the investigation of the in uence of the above-mentioned factors on cutting input.Machinery and toolExperiments were realized on a single-spindle drilling machine of FVS type; feed ... represents 2.4% diﬀerence.Measuring of cutting inputAt experimental measurements of cutting input the common principle of measurement was used based on monitoring changes in the current drawn by an ... with constantly rising claims for wood processing and a subsequent increase in prices, the question of energy intensity (G 2008) of produc-tion has come to the fore. Milling as one of the...

Báo cáo lâm nghiệp: " The influence of Picea abies on herb vegetation in forest plant communities of the Veporské vrchy Mts" ppt

... propor-tion of spruce. In all ordination analyses the scaling on inter-species distances using biplot scaling and logarithmic data transformation was employed.Ordination analyses were carried out in ... diagnostic species and they play a key role in characterization and diﬀerentiation of the vegetation units. In this case they provide the comparison of units within the proportion of spruce. Bryophytes, ... spruce stands a reduction of mesophilous herbs and an increase of acidophytes, resulting in lower richness than in hardwood stands. e negative ef-fect of Picea abies on diversity and cover of vascular...

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