Báo cáo lâm nghiệp: "Influence of herbaceous competitors on early growth in direct seeded Fagus sylvatica L and Quercus robur L" ppt
Báo cáo lâm nghiệp: "Influence of herbaceous competitors on early growth in direct seeded Fagus sylvatica L. and Quercus robur L" ppt
... 781–788© INRA, EDP Sciences, 2005DOI: 10.1051/forest:2004075zOriginal articleInfluence of herbaceous competitors on early growth in direct seeded Fagus sylvatica L. and Quercus robur L. Magnus L F*, ... and above herbaceous competitors (0.3 m and 1.5 m) in the middle of July in 1995 and in August 1996 and 1997 on ten locations per treatment and block (LI-190SA, LI-COR Inc. Lin-coln, Neb). On ... In 1995, Fagus sylvatica L. (Mar-amures, Romania, collected in 1994) and Quercus robur L. (Vestfold,Norway, collected in 1994) were used. In 1996, Fagus sylvatica L. (Gråsten, Denmark, collected...
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Báo cáo lâm nghiệp:"Influence of cotyledon removal on early seedling growth in Quercus robur L." doc
... weight in relation to environmental conditions in California, Ecology 53 (1972) 997–1010.[5] Bonfil C., The effects of seed size, cotyledon reserves and herbivory on seedling survival and growth in ... Number of replications in each experiment, stage of growth and experimental conditions.Factorial experiment Harvest atdifferent stages of growth Full light ShadeStage of growth Control Cotyledon ... to analyse the combined effect of cotyledon removal and shading. The cotyledons of half of the seed-lings were removed at emergence. Removed cotyledons werelabelled and dried at 80 ºC during...
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Báo cáo lâm nghiệp: " Influence of environmental conditions on radial patterns of sap flux density of a 70-year Fagus crenata trees in the Naeba Mountains, Japan" ppsx
... to flush in late Aprilor early May, while autumn leaf coloring starts in late October. 2.2. Micrometeorology and soil moisture contentMeteorological conditions were monitored from scaffolding ... RESULTS AND DISCUSSION3.1. Forest microclimate and variations in soil moisture contentDaily rainfall (Pday) in late summer was extremely low withno measured rainfall between July 25 and August ... value in the interior of the cambium layer and wasshown to decrease exponentially along the radial axis of thexylem. We assumed a regular transition in the sap flux densityalong the radial...
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Báo cáo lâm nghiệp: "Influence of marine salts on the localization and accumulation of surfactant in the needles of Pinus halepensis Mill" ppsx
... chemicals in plant cuticles.Rev Environ Contam Toxicol 108, 1-70Original articleInfluence of marine salts on the localization and accumulation of surfactant in the needles of ... sulfonatecould accumulate in the leaf cuticle of P halepensis Mill after a 2 min immersion of the foliage in a saline solution of LABSsimulating a storm. According ... condition of pollution fromcoastal marine aerosol. Mar Pollut Bull 20, 115-119McWilliams EL, Sealy RL (1987) Atmospheric chloride:its implication for foliar uptake and...
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Báo cáo lâm nghiệp: "Influence of light conditions on the predetermination of foliar characteristics in Betula alleghaniensis Britton" ppsx
... were notobserved in leaves harvested in mid-August.Chlorophyll contentThe chlorophyll content of early leaveswas also influenced by the light conditions of year n (Fig. ... were less noticeable in early leaves harvested later, and were no longersignificant in late leaves.DiscussionAll analyzed characteristics (structure,anatomy and chlorophyll ... for early leaves harvestedat the beginning of the season. Leaveswhich developed on seedlings which wereexposed to full sun conditions during yearn had proportionally higher...
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Báo cáo lâm nghiệp: "Effects of light intensity on the growth and energy balance of photosystem II electron transport in Quercus alba " potx
... ‘quenching shift rate’ declined as well. Overall, Quercus albaseedlings demonstrated strong growth and allometric responses to light intensity. white oak / shade tolerance / biomass allocation ... réponses allométriques à l intensité de l éclairement. Quercus alba / tolérance à l ombre / répartition de la biomasse / fluorescence modulée de la chlorophylle / acclimatation à la lumière1. INTRODUCTION Quercus ... differences in RCD and HT among light levels were ana-lyzed separately for each measuring date using one-way analysis of variance followed by Bonferroni’s multiple comparisons. One-wayanalysis of variance...
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Báo cáo lâm nghiệp:"Effect of tube shelters on the growth of young Turkish pines (Pinus brutia Ten., Pinaceae)" pptx
... 1995 and were 1 year when theywere planted on an area of around 5 ha, on a shallow, stony, chalkysoil. The planting alternated one row of one-year seedling pines and five rows of vines. The pines ... during anuninterrupted elongation phase. The growth units of the genus Pinus,which are clearly structured with three main zones –a scale leaveszone, a brachyblastes (dwarf branches) zone and ... –Effect of tube shelters on the growth of Pinus brutia 5513.2. Influence of the tube shelters on the annual shoot structureAverage annual shoots length, all polycyclism categoriescombined,...
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Báo cáo lâm nghiệp: "Effects of seedling density on the growth of Corsican pine (Pinus nigra var. maritima Melv.), Scots pine (Pinus sylvestris L.) and Douglas-fir (Pseudotsuga menziesii Franco) in containers" ppt
... had little effect on the height of loblolly pine seedlings. Longleaf pine,however, showed a much larger increase in both height and seedling dry weight thanloblolly pine ... in dry mat-ter accumulation by seedlings; root collardiameter is a more useful indicator of seedling size.Taller seedlings generally remain taller in the years following ... competi-tion for light and to allow seedlings torespond to increased availability of mineralnutrients and water. In practice, seedlingdensity and cell volume are interrelatedsince...
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Báo cáo lâm nghiệp: "Effect of water stress on potassium distribution in young seedlings of maritime pine (Pinus pinaster" doc
... cell enlargement. Twocellular processes may be involved in tur-gor maintenance: variation in cell wallelasticity and/ or accumulation of intracellu-lar solutes. Actually, ... and Lamant,1989), a more intense osmoregulationwas found in root apices of young seed-lings of the Tamjoute population comparedto seedlings of the Landes population.Materials ... component in plantcells, is often thought to be a possibleosmoregulator (Wyn Jones and Gorham,1983). In this paper, two populations of mari-time pine (Pinus pinaster...
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Báo cáo lâm nghiệp: " Influence of temperatures and precipitation on radial increment of Orlické hory Mts. spruce stands at altitudes over 800 m a.s.l" ppt
... regional index residual tree-ring chronology was created in the ARSTAN application. e chronol-ogy has low values of autocorrelation. e standard regional tree-ring chronology was also established. ... evaporation in- tensively and the following decrease in soil moisture in the top ground layer then reduces the creation of nutrients and also water availability during the fol-lowing spring, especially ... calculate the correlations of diameter increment values with climatic factors the regional residual index tree-ring chronology and the climatic time series of average monthly temperatures and...
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