Báo cáo lâm nghiệp: "Eﬀects of the clear-cutting of a Douglas-ﬁr plantation (Pseudotsuga menziesii F ) on the chemical composition of soil solutions and on the leaching of DOC and ions in drainage waters" pps

Báo cáo lâm nghiệp: "Eﬀects of the clear-cutting of a Douglas-ﬁr plantation (Pseudotsuga menziesii F.) on the chemical composition of soil solutions and on the leaching of DOC and ions in drainage waters" pps

... 10.1051/forest:2006103Original articleEﬀects of the clear-cutting of a Douglas-ﬁr plantation (Pseudotsuga menziesii F. ) o n the chemical composition of soil solutions and on the leaching of DOC and ions in drainage ... species, a shortening of rotations and a mechani-sation of the thinning, harvesting and regeneration operationsresult in constraints to the physical, chemical and biologicalproperties of the soil ... consisted in seasonal cycles and in the eﬀect of clear-cutting (decrease in concentrations and disappearance of seasonal cycles). The example of Mg2+is presented in Fig-ure 2.Capillary solutions...

Báo cáo lâm nghiệp: "Eﬀects of drought and heat on forest insect populations in relation to the 2003 drought in Western Europe" ppt

... Observations of changes in population levels of the main European forest insect pests during and after the drought arepresented and discussed in the light of current knowledge and theories of interactions ... [27,67], and their capacity to escape un-favourable environmental conditions [58].2.1. Eﬀects of summer heat on the survival of earlyinstars of defoliators and aphidsThaumetopoea pityocampa (Denis ... [26]. The mortality of some larvae of T. pityocampa can also have animpact on the survival of the entire batch (group of larvaehatched from the same egg mass) because the ability to con-struct...

Báo cáo lâm nghiệp: "Eﬀects of soil mechanical treatments combined with bramble and bracken control on the restoration of degraded understory in an ancient beech forest" pptx

... For. Fr. 2(199 8) 124−137 (in French).[32] Hildebrand E.E., The in uence of soil compaction on soil func-tions in forest sites, in: Seminar on the impact of mechanization of forest operations on ... with a Monte Carlo test of signiﬁcance (1000 permutations). The table shows the indicator value of each species (% of perfect indication, based on combining the values for relative abundance and ... Nitrate leaching and loss of or-ganic carbon after tillage are often very strong in the initialphase, i.e. in the ﬁrst year following the treatment [20]. The organic C and total N supply can...

Báo cáo lâm nghiệp: "Eﬀects of microsite variation on growth and adaptive traits in a beech provenance trial." pps

... grid and their values for the positions of individual trees were estimated by ordinary point kriging. The evaluation of phenotypic variation (height, diameter, Julian days of spring flushing and ... and adaptive traits in a provenance trial, and whether blocking can eﬃ ciently handle this variation.MATERIALS AND METHODS e study is based on the analysis of the Slovak trial plot of the ... range from 29% to 46%, indicating that a substantial portion of the trait variation is caused by genetic variation within populations and/ or environmental variation on very small scales.Analysis...

Báo cáo lâm nghiệp: "Eﬀects of selective thinning on growth and development of beech (Fagus sylvatica L.) forest stands in south-eastern Slovenia" docx

... by the reduction in stem number (N), basal area (G) and growing stock(GS ) as a percentage of the values per hectare before harvesting, and by the ratio qD of the quadratic mean diameters of ... Evolution of the population of crop trees in the thinned stands (T1 and T 2) in the period 1980–2001.Eﬀects of selective thinning on beech forests 53Figure 5. Mean annual basal area increment of the ... sup-pressed) according to Kraft classes [2]. The analysis of variance (enter method) was used to test the in- ﬂuence of d1.3class and of the three parameters mentioned above on the basal area increment...

Báo cáo lâm nghiệp: "Eﬀects of resource availability on condensed tannins and nitrogen in two Quercus species diﬀering in leaf life span" doc

... photosynthetically active radiation), at two water regimes (500 and 800 mm) and with two nutrient availabilities(standard substrate and 7% increase in soil N). The concentrations of soluble condensed ... Eﬀect of daily supplementation of polyethylene glycol on intake and di-gestion of tannin-containing leaves (Quercus calliprinos, Pistacialentiscus and Ceratonia siliqua) by goats, J. Agric. Food ... sulfate in 2 N HCl) and maintained in a boiling bath for 60 min. The absorbancewas read at 550 nm after cooling the tube. Non-heated replicatetubes for each extract were used as anthocyanin blank...

Báo cáo lâm nghiệp: "Eﬀect of species composition, stand density and site index on the basal area increment of oak trees (Quercus sp.) in mixed stands with beech (Fagus sylvatica L.) in northern France" potx

... DeﬁnitionSioakSite index expressed as dominant height at base age of 100 y (m)ageoakStand age of oak at measurement (a) mixBeechAdmixture of beech as the basal area of beech/ total basal area ... growing space eﬃciency and thus crowds out oak [44].Variations in weather can also have an impact on basal areaincrement [30]. Even though the evaluation dataset was based on a large variety of ... thirdgroup, “Haye”, was in the Lorraine region in northeastern France(4 plots). A total of 33 502 observations on 8 005 trees were available.General information on the experiments and abbreviations is...

Báo cáo lâm nghiệp: "Eﬀect of leaf biomass and phenological structure of the canopy on plot growth in a deciduous hardwood forest in northern Japan" pot

... Thinning was performed in 1984. Values (stem number and basal area just before and after thinning and thinning ratio) are shown for 1984 and 1995.Plot Before thinning After thinning Thinning ... m2/5m2 ) for eachcombination of plot and month. Annual leaf biomass was calculatedby summing monthly leaﬀall.To quantify the phenological pattern of leaﬀall and the corre-sponding phenological ... growth.4.2. Foliage composition We found that the relative amount of late-falling foliage (relativeLB 2) changed as the stand developed, and was likely a ected by boththinning and insect defoliation. The...

Báo cáo lâm nghiệp: "Eﬀect of an oil heat treatment on the leachability and biological resistance of boric acid impregnated wood" pps

... Coupled Plasma analysis (ICP) of leachates, leached and unleached samples. Analyses of boron amount remaining before and after leaching were realized after specimen’s extraction in hot waterat 80◦C ... lossControl(o) (o) (o)(0. 5) (0. 5) (0. 5) (0. 5) (1. 0) (1. 0) (1. 0) (1. 0) (C)Figure 4. Mass losses of C. japonica (C) and F. crenata (D) sap-wood specimens treated with combinations of boric acid ... rot fungi, 85 mL of a solution containing 40 g of glucose,3 g of peptone, 15 g of malt extract and 1 000 mL of distilled water;for Brown rot fungi: 80 mL of a solution containing 20 g of glucose,1.5...

Báo cáo lâm nghiệp: "Eﬀect of Melampsora larici-populina on growth and biomass yield of eight clones of Populus nigra" ppsx

... t-test).Using the analysis of variance the in uence of the factors clone, treatment and replication and their interactions on plant height and stem diameter of plants was studied in 2006 and 2007. ... to evaluate the stability of the degree of infection within the particular clones of black pop-lar in the years of observation, the relationship be-tween the severity of clone infection by ... 0.0 5) in infec-tion from clones 7, 107, 110, 152.  e stability of the intensity of infection of black poplar clones by the rust (the rank of clones ac-cording to the intensity of infection)...

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