Báo cáo lâm nghiệp: "Ultrastructural and biochemical changes at the preinfection stage of mycorrhizal formation by two isolates of Pisolithus tinctorius" ppt
Báo cáo lâm nghiệp: "Ultrastructural and biochemical changes at the preinfection stage of mycorrhizal formation by two isolates of Pisolithus tinctorius" ppt
... of eucalypts to mycor-rhizal inoculation in the Congo. For. Ecol.Manag. 24, 151-157Ultrastructural and biochemical changes at the preinfection stage of mycorrhizal formation by ... & Trappe J.M. (1984)Ectomycorrhiza formation in eucalyptus. The ultrastructure of compatible and incompatible mycorrhizal fungi and associated roots. NewPhytoL 96, 43-53Massicotte ... hadoccurred.Materials and MethodsPlant materials and mycorrhizal synthesis wereaccording to Malajczuk et al. (1989). Fine lat-eral roots were sampled after 2 and 4 d of incu-bation...
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Báo cáo lâm nghiệp: "Regeneration and game damage in the Krušné hory Mts. assessed on the basis of National Forest Inventory of the Czech Republic" pps
... processed by means of a set of mathematical and statistical methods that are described in the work Inventory of forests in the Czech Republic, Set of mathematical and statistical evaluation methods, ... methods, Mathematical and statistical processing of sets with measured data (Z 2004).Estimations of parameters of the basic set differ in qualitative and quantitative variables.For qualitative ... 2000). The database acquired directly in a forest has a great information potential. Mathematical and statistical methods enable to get series of data and phenomena both by simple assessment of...
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Báo cáo lâm nghiệp: "Morphological and functional variability in the root system of Quercus ilex L. subject to confinement: consequences for afforestation" ppt
... taproots. The confining of lateral roots in the con-tainer and their downward growth lead to the generation of anorthogeotropic lateral root system rather than the more usualplagiotropic one that ... overall higher values for allthese variables characterising the shorter (ST) tube type. On the other hand, the information given by ARwas less relatedto that provided by the aforementioned traits.Ann. ... KR(i.e. the inverse of hydraulic re-sistance) is defined as the ratio that measures water movementthrough the roots relative to an external driving force control-ling the water flow. The adequacy of...
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Báo cáo lâm nghiệp: "Diurnal and seasonal fluctuations in the bark respiration of standing Quercus acutissima trees in Nakaizu, Japan" docx
... the day, and the difference between the daily maximum and minimum values of respiration rates in the upper part of the stem was greaterthan that of the lower part of ... fluctuations of stem bark res-piration at 0.4, 6.4 and 12.4 m at the edge of the stand on 30 July 1986 are shown inFig. 2 together with photosyntheticallyactive radiation, ... lower part of the samestem. Between 600 h and 1800 h on July30 at 0.4 m, the respiration rates at the edge of the stand underwent a daytimedepression. The depression...
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Báo cáo lâm nghiệp:"Growth and biomass partitioning of Fagus sylvatica L. and Quercus robur L. seedlings in response to shading and small changes in the R/FR-ratio of radiation" pot
... through the canopy and/ or by the changed spectral composition of the radiationbelow the canopy. In particular the ratio of the red components of radiation to those of the far red (R/FR-ratio) ... how the variation in R/FR-ratio at the top of the shoots and the related growth responses are caused by neighbouring plants and not by canopy trees [20, 41], or theyinvestigated the effect of ... partitioning of beech. Relativegrowth rate of the main stem dry mass of oak was considerably higher for the seedlings of the shade treatment with the reduced R/FR-ratio thanfor the control and the other...
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Báo cáo lâm nghiệp: "Production and humus form development in forest stands established on agricultural lands – Kostelec nad Černými lesy region" potx
... horizons) in the spruce stand on the former arable soil and then in the Douglas fir one, lower in the pine stand and especially lower in the older stand on forest land. In the mineral soil, the highest ... In the litter layer, no statistically significant differences were registered, despite the fact that the values are the highest in the Douglas fir stand and similar ones in stands of the other ... were in the field soil, followed by birch stand, the situation in the conifer stands was quite comparable – with a tendency of the lowest values in the old forest stand. In this stand, the base...
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Báo cáo lâm nghiệp: "Growth and physiological state of beech seedlings grown in a nursery in different light conditions" docx
... 2003). Further evaluation of the survival and growth of seedlings grown in the sun and in the shade after their outplanting to diff erent conditions will show to what extent the need of adaptation ... mol·m–2·s–1 while the interval between the impulses of saturation light was 10 s. e evaluated parameter was the photosynthetic electron trans-port rate (ETR) indicating the velocity of electron ... conditions.Seedlings grown in the unshaded plastic greenhouse (the sun variant) were taller and stronger at the end of the first growing season and had the higher weight and volume of shoots and root systems...
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Báo cáo lâm nghiệp: "Structure and development of forest stands on permanent research plots in the Krkonoše Mts" pdf
... study. The horizontal structure of the forest stand was from the first year of ob-servation till 2010 random; in following years the stand tends to more aggregation. The spatial di-versity of the ... around 10 cm) and the absence of lower dbh classes refl ect former natural regeneration of the stand ceased in the past. e occurrence of new regeneration will depend on the creation of new canopy ... vegetation period: 130 days,– precipitation of the vegetation period: 650 mm,– annual temperature amplitude: 19.9°C,– mean temperature of the vegetation period: 12.9°C,– water saturation:...
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Báo cáo lâm nghiệp: "Sulphur and nitrogen concentrations and fluxes in bulk precipitation and throughfall in the mountain and highland spruce stands in the Czech Republic" docx
... radiation and to hold the funnels approximately 1 m above the ground. ere were 7 collectors randomly dis-tributed at the mountain spruce stand and 5 at the highland spruce stand. During the ... in the past. K et al. (1996) evaluated the mean annual concentrations of sulphate and ni-trate in bulk precipitation in Rájec for the period of 1976–1990. Average sulphate and nitrate ... compare it with the sulphur deposition fl uxes at other sites in the Czech Republic. MATERIAL AND METHODSDescription of the study sites and characteristics of the two spruce stands studied is...
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Báo cáo lâm nghiệp: "Ecological and morphological notes on Notopygus bicarinatus (Hymenoptera: ichneumonidae)" ppsx
... were located beneath the trees’ canopy, along a contour line, at intervals of 5–10m. Leaf and forest litter (ca to the depth of 15 cm) was dug away and removed at these sites, followed by Ecological ... mesh and regularly moistened until the adults emerged (at a temperature of 20°C and 16 h of daylight). All material was collect-ed by the Forestry and Game Management Research Institute and ... and determinate by J. Šedivý (material from 2003) and K. Holý (material from 2004–2005).Measuring of the size of adults (length of body – form head to end of metasoma, length of the fore wing)...
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