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Báo cáo lâm nghiệp: "Sessile oak (Quercus petraea Liebl ) site index variations in relation to climate, topography and soil in even-aged high-forest stands in northern France" doc

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Báo cáo lâm nghiệp: "Sessile oak (Quercus petraea Liebl.) site index variations in relation to climate, topography and soil in even-aged high-forest stands in northern France" doc

... petraea Liebl. ) site index variations in relation to climate, topography and soil in even-aged high-forest stands in northern FranceLaurent BERGÈSa*, Richard CHEVALIERa, Yann DUMASa, Alain ... years), nearly pure, even-aged, closed, high-forest stands of oaks grown from seedlings. Stands wereselected according to official information on the origin of the stand(seedling or sprout) in ... different trend with an optimum site index close to acidic sites in the West and close to neutral sites in theEast. In our study, site index response to specific chemical soil variables was consistent...
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Báo cáo lâm nghiệp: "Can understory vegetation accurately predict site index? A comparative study using floristic and abiotic indices in sessile oak (Quercus petraea Liebl.) stands in northern France" ppt

... Sessile oak (Quercus petraea Liebl. ) site index variations in relation to cli-mate, topography and soil in even-aged high-forest stands in nor-thern France, Ann. For. Sci. 62 (200 5) 391–402.[10] ... territory. The relationships between site index and ( 1) understory vegetation or ( 2) soil, topography and climate were studied using data from 99 even-aged high-forest stands located in northern France. ... ( 2) it wouldbe more appropriate to combine soil physical and chemical properties, climate and topography with floristic indices to estimate sessile oak site index. site index / ecological factors...
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Báo cáo lâm nghiệp: "Holm oak (Quercus rotundifolia Lam.) and Aleppo pine (Pinus halepensis Mill.) response to different soil preparation techniques applied to forestation in abandoned farmland" pps

... for the annual increase in height and diameter in Aleppo pine(Pinus halepensis) and Holm oak (Quercus rotundifolia) recorded during the entire monitoring period (time in years). (* 0.05 > ... annual dead seedlingsrecorded during the study period (1996–200 0) for Aleppo pine (Pinus halepensis) and Holm oak (Quercus rotundifolia) in relation to time (in years) and type of treatment. Tuckey’s ... used to determine anysignificant differences in each case (post hoc tests).Behaviour indexes were obtained for the height and diameter ofHolm oaks and Aleppo pines in relation to the growth and...
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Báo cáo lâm nghiệp: " Sessile oak seedling fertilization and leaf mineral composition in western France" docx

... of N and Ca to adult stands. ii) Ashort-term objective was to investigateresponses of young oak seedlings to mineralfertilization and to more accurately deter-mine their ... belowthat in experiment 1.INTRODUCTIONLittle research has been devoted to the min-eral demands of sessile oak (Quercus petraea Matuschka, Liebl) concerning soil fertility and ... in the FAO classification), in young(2-10-year-old) sessile oak seedlings from natural regeneration. The main limiting factors for growthwere phosphorus and nitrogen. In...
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Báo cáo lâm nghiệp: "Nutrition of silver fir (Abies alba Mill) growing at the upper limit of its occurrence in the Šumava National Park and Protected Landscape Area" pot

... groups 7K (acid soils in the 7th altitudinal vegetation zone) and 8K (acid soils in the 8th altitudinal vegetation zone). Fig. 3 and Fig. 4 show histograms for selected elements. In the higher ... stress elements in the cur-rent year needles of fir taken in 2006 and 2007 in the Bohemian Forest, in the mature stands growing predominantly above 1,100 m a.s.l. MATERIAL AND METHODSSamples ... MDS-2000 microwave system. Total nitrogen and sulphur were deter-mined with a CNS analyzer. Chlorine was deter-mined using argentometric titration in the plant material following decomposition with...
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Báo cáo lâm nghiệp: "Response of Douglas-fir leaf area index and litterfall dynamics to Swiss needle cast in north coastal Oregon, USA" ppt

... poorlywith stand density index. In stands that are still building leafarea after a recent thinning, foliage litterfall rates should belower, suggesting that the relationship between stand density and ... 42 (199 6) 282–289.[46] Poikolainen J., Kubin E., On the correlation between needle lit-terfall and defoliation in a Scots pine stand and in a norwayspruce stand, in: Aamlid D. (Ed .), Crown ... range in stand and site conditions, including SNC severity. The specificobjectives were to test the null hypothesis that the followingquantities were invariant among stands with a wide range in SNC...
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Báo cáo lâm nghiệp: "Discrimination of coated carbide tools wear by the features extracted from parallel force and noise level" potx

... woodworking tools and its appli-cation to the in- process monitoring of wear, in: Proceedings of the11th International Wood Machining Seminar, 1993, pp. 147–156.[8] Lemaster R., Tee L., Monitoring ... tools tested with cuttingspeed for the final cutting length.Figure 7. Linear relationships between noise level and parallel forceof the tools investigated (in average) for 30, 40, 50 m/s and ... Testing was stopped up to ten pass of cutting (cutting lengthof about 5 km).2.3. MeasurementsAll tools were inspected before testing to assure that there are nosurface cracks and chippings...
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Báo cáo lâm nghiệp: "Canonical correspondence analysis for forest site classification. A case study* " ppt

... state of the stands) ; iii) it helps in selecting the ecological variables that are relevant for site classification; iv) it can be used to define synthetic indexes of the ... CCA ordination axis (ie, the tro-phic gradient) using: i) the coordinates ofthe species as an index of their ecologicaloptimum; and ii) the coordinates of the siteson ... and amplitudeof plant species and thus to obtain information on good bioindicator species. site classification / data analysis / ecological gradient / soil- vegetation relationshipsRésumé...
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Báo cáo lâm nghiệp: "Diagnosing plant water status as a tool for quantifying water stress on a regional basis in Mediterranean drylands" pdf

... MPa in May (site H) and decreased to –1.2 MPa atsites H, D1 and D2 (September), and further to –1.7 MPaat site D3. For C. siliqua, Ψminranged between –1.8 MPaat site H and –3.0 MPa at site ... landscapedegradation.IstanbulBursaIzmirAntalyaAdanaAnkara Site H (Güzelçamli) Site D2 (Karine) Site D1 (Kuyuluk) Site D3 (Mut)NorthabcFigure 1. a) The two study areas, located in theDilek peninsula near Izmir and in the State ofMersin, ... suffi-cient to reduce water loss in this species. In fact, plantsgrowing in the most degraded site (D 3) were able to maintain RWC’s at similar levels with respect to thoserecorded in site H, by reducing...
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Báo cáo lâm nghiệp: "Influence of the moisture content of forest tree its response to different viability tests pollen on" pdf

... temperatures using a water bath(T 1) and an incubator (T 2). The 100% RH wascreated by saturating air in a closed containermaintained at the incubator temperature T2.Germination ... fully understood but loss ofmembrane integrity may be involved(Shivanna and Heslop-Harrison, 198 1). ). Certainly, it is a principal factor in the lossof vigor in corn (Kerhoas, ... (198 3) and Webber (198 7). Theeffect of 2 relative humidities (70 and 100% RH) and 3 temperatures (10, 20 and 30°C) onrehydration of Douglas fir (Pseudotsuga men-ziesii)...
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