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Báo cáo lâm nghiệp:" Needle longevity, shoot growth and branching frequency in relation to site fertility and within-canopy light conditions in Pinus sylvestris" potx

Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp:" Needle longevity, shoot growth and branching frequency in relation to site fertility and within-canopy light conditions in Pinus sylvestris" potx

... 195–208© INRA, EDP Sciences, 2003DOI: 10.1051/forest:2003012Original article Needle longevity, shoot growth and branching frequency in relation to site fertility and within-canopy light conditions ... average needle age, shoot length growth, and branching frequency in response to seasonal averageintegrated quantum flux density (Qint) were investigated in Pinus sylvestris L. in a fertile site ... biomassinvestment in branches in low light. However, in our study,there was an increase in the fractional investment in needleswith increasing Qint in the fertile site, and no effect of Qint in the...
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Báo cáo lâm nghiệp: "Response of shoot growth and gas exchange of Picea abies clones to rain acidity and the addition of ions" ppt

... were obtainedfor top shoot growth of clones 1011 and 1019, the latter showing lower finallengths (A = 112-136 mm), lower b-values(b = 4.8-5.7) and inflexion points on ... (UIA), Universiteitsplein 1, B-26 10 Wifrijk-Antwerpen,BelgiumIntroductionThe novel forest decline observed in Eu-rope and the U.S.A. may be caused byseveral factors, among ... thought to be very important. Interfer-ence of pollutants with the ecophysiologi-cal performance of forest trees needs to be investigated in order to understand theactual...
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Báo cáo lâm nghiệp: "Study of the properties of thirteen tropical wood species to improve the prediction of cutting forces in mode B" pptx

... improve the relation that allowedcalculating cutting forces involved during machining, and to take into account, more precisely, the influence of wood mate-rial in this relationship. 3.1. Relationship ... forcesduring wood machining, a factor remains difficult to take intoconsideration: the influence of wood species. Therefore, theaim of this study is to understand the influence of the internalstructural ... this kind of model, with factors interactions, seems to be able to explain wood species behaviour and solicitationsinvolved during machining.3.3.2. Comparison with different methodsToday, in...
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Báo cáo lâm nghiệp: "Evaluation of the growth and health status of selected clone mixtures in comparison with ordinary planting stock" docx

... physiological processes is described in rooted cuttings compared to seedlings, e.g. later onset and lower intensity of dormancy and cold hardiness and earlier flushing in spring (F et al. 2000). ... samples were put into a cooling box in the field and subsequently transported to a laboratory for evalua-tion. In the laboratory the branch bases were put into water, covered and sealed with ... is to evaluate possibilities of natural selection of tolerant clones by situating ortet plantations and clone plantations into extreme mountain conditions. MATERIAL AND METHODS Growth and...
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Báo cáo lâm nghiệp: "Modelling dominant height growth and site index curves for rebollo oak (Quercus pyrenaica Willd.)" pptx

... classified into different stratums according to altitude.The recognition of these problems in such wide areas, and the increasing interest in using these stands for either directproduction (such as wine ... ecologi-cal conditions (stratums and testing data) makes this site indexmodel a good option for classifying site qualities of Q. pyre-naica stands.Figure 7. Site index predictions against total ... 660–667.[9] Calama R., Cañadas N., Montero G., Inter-regional variability in site index models for even-aged stands of stone pine (Pinus pineaL.) in Spain, Ann. For. Sci. 60 (2003) 259–269.[10]...
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Báo cáo lâm nghiệp: "Relationship between root growth potential and field performance in Aleppo pine" doc

... differences in the growth chamber RGP, with a peak in December (between 7 to 12 new roots longer than one cm) and very low values in November and January for seedlingsmaintained in mild and cold ... evaluated in needles and starch and soluble sugars in the whole shoot. N = 25 seedlings in a composite sample.542 A.D. del Campo et al.stock possible. To this end, the effects of seedling quality ... (iii) to examine the relationship between RGP and field performance on two contrasting sites.2. MATERIALS AND METHODS2.1. Plant material and seedling qualityA total of six seedling stocklots...
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Báo cáo lâm nghiệp: "Predicting balsam fir growth reduction caused by spruce budworm using large-scale historical records of defoliation" potx

... ofstandardized ring width and periodic annual increment in volume,respectively, in order to eliminate the effect of tree ageing and initialtree size on growth loss estimations. Since we tried to ... sum-marized in Table I.2.2. Sampling procedureThe selected PSPs were located and inventoried again during thesnow-free periods between 1998 and 2002. The inventory consisted in measuring the diameter ... pre-sumably because of the continuous abundance of balsam firstands [8, 24, 25]. Since fir-dominated stands are still abundant and are expected to remain so into the future, sustained man-agement of...
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Báo cáo lâm nghiệp: "Variability of initial growth, water-use efficiency and carbon isotope discrimination in seedlings of Faidherbia albida (Del.) A. Chev., a multipurpose tree of semi-arid Africa. Provenance and drought effect" doc

... are deeply indebted to J.M.Guehl for having introduced them into theworld of carbon isotope discrimination and forhelpful discussions and suggestions during thewhole ... negative correlation betweenW and LMR in Quercus petraea and Pinus pinaster, and Virgona et al. [33] reporteda similar result in sunflower. LMR couldthus be an interesting predictor ... Genetic and environ-mental variation in transpiration efficiency and its correlation with carbon isotope dis-crimination and specific leaf area in peanut, in: Ehleringer J.R.,...
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Báo cáo lâm nghiệp: "How the absolute growth rate of poplar adapts to the light-NO -dosage 3 G.A. Pieter" pot

... 67038W Wageningen, The NetherlandsIntroductionThe growth of leaves and internodes on abranch of poplar, grown under constant conditions, proceeds according to growth patterns, ... development of individual leaves and internodes in the linear phase ofof nitrate could not sustain a high RGR50 in growing leaves.Dry matter- (Fig. 1) and N- (Fig. 2) ... notable to adapt to a deficiency of, e.g., K+ orMg2+ and reacts with immediate deficien-cy symptoms (Dorenstouter ef aL, 1985).Linear dosage of nitrate in proportion to PFR...
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Báo cáo lâm nghiệp: "The first reaction of soil mite fauna (Acari, Mesostigmata) caused by conversion of Norway spruce stand in the Szklarska Poręba For" potx

... stand Forest site 1 169b pure stand of 111-year-old spruce mixed mountain forest site 2 169b 4-year-old beech stand in a thinned 111-year-old stand mixed mountain forest site 3 169g pure stand ... mountain forest site 4 169b cluster of 8-year-old fir under a 112-year-old spruce stand mixed mountain forest site 5 280d stand of 10-year-old beech mountain forest site 6 179kthinned stand of dominant ... mites/m2 found in experimental plots with stands non conversed (1, 3 and 7) and with stands during conversion (2, 4 and 8)Stands non conversed Average density (m2) Stands during conversion...
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