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Báo cáo lâm nghiệp: "Seasonal and intraspecific variation of frost tolerance in leaves of three Canarian laurel forest tree species" doc

Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Seasonal and intraspecific variation of frost tolerance in leaves of three Canarian laurel forest tree species" doc

... assessment of frost damage in upper crown leaves (sun leaves) and inner crown leaves (shade leaves) during warm and cold seasons in Laurus azorica, Persea indica and Myrica faya. Tem-perature of incipient ... freezing temperatures showed an intraspecific variation between leaves exposed in the uppercrown (sun leaves) and in the lower and inner parts (shade leaves) of the dense canopy of this forest ... resistant.No seasonal variation in the degree of frost tolerance wasobserved in shade leaves. Only the sun leaves showed slightseasonal variations of frost tolerance and this could be due tothe...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Heartwood and sapwood variation in Eucalyptus globulus Labill. trees at the end of rotation for pulpwood production" potx

... negative in uence on the pulping quality increas-ing chemical consumption in pulping and bleaching, decreas-ing pulp yield and pulp brightness, and increasing processcosts [20]. For the pulp and ... within and between- tree variability of sapwood and heartwood in four commercialplantations of E. globulus at the time of harvest for pulp pro-duction, and analyse the in uence of radial tree ... length of the heartwood-free stem, proportion of heartwood in tree height (%), stemwood volume, heartwood volume and proportion of heartwood in tree volume. Average of twelve trees per site, in...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Latitudinal and altitudinal variation of bud burst in western populations of sessile oak" docx

... would increase the exposure of seedlings to the rigors of spring frost and possibly to insect damage since the forest managers do not have a method for pre-venting frost ... sub-ject of numerous studies in forestry and arboriculture. This character is of primaryimportance since it is linked to frost resis-tance and avoidance of pests. Furthermore,clinal ... Latitudinal and altitudinal variations of bud burst in western populations of sessile oak (Quer-cus petraea (Matt) Liebl) are examined. The phenology of bud burst in 50...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Nursery fertilisation affects the frost-tolerance and plant quality of Eucalyptus globulus Labill. cuttings" ppsx

... survival by reducing the risk of intracellu-lar freezing, owing to the lowering of the cytoplasm freezingpoint, and by maintaining cell turgor [11]. These strategiescontribute to increasing the resistance ... used in the nurseries during the growing phase of theplants [28]. It was taken as a reference for calculating the dosage of nutrients applied in the other treatments. The remaining macro- and micro-nutrients ... Boudet A.M.,Carbohydrate content of Eucalyptus gunnii leaves along a annualcycle in the field and during induced frost- hardening in controlledconditions, Trees 10 (1995) 86–93.[34] Marshall...
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Báo cáo lâm nghiệp: "Seasonal fluctuation in germination of short and longterm stored Norway spruce" ppsx

... averages of GE and GC were expressed in absolute values (in %) and also by means of seasonal indexes (Š 1998), which standard-ise their course and eliminate the differences in the level of ... testing times T1 and T2 on the level of 59.1% with standard deviation of ± 17.3% and variation coefficient of 29.3%. e shape of values distribution indicates (according to coefficients A and ... 2002. Seasonal and chilling effect on germination of Norway spruce (Picea abies (L.) Karsten) and Scots pine (Pinus sylvestris L.) seeds. In: Proceedings 2002 Annual Meeting of IUFRO 2. 09....
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Báo cáo lâm nghiệp: "Seasonal ionic exchange in two-layer canopies and total deposition in a subtropical evergreen mixed forest in central-south China" pps

... 5.5, and 4.3 in rainwa-ter, 6.0, 6.6, 6.2, and 4.3 in throughfall and 7.0, 6.9, 6.1, and 4.7 in sub-throughfall in spring, summer, autumn, and winter,respectively.Ion exchange in canopies and ... pH of rainwater in summer (4.3) and winter (4.3) was very low, being a little bit higher in spring(4.7). As said, rain quantity in spring and summer accountedfor more than 70% of annual rainfall. ... H.L., Exchange of Ca2+,Mg2+ and K+ and the uptake of H+,NH+4for the canopies in the subtropical forest in uenced by the acid rain in Shaoshan forest located in central south China, Plant...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Seasonal changes of plant hydraulics, water relations and growth of Aesculus hippocastanum seedlings infested by the leafminer Cameraria ohridella" ppt

... vapour of infested seedlings was reduced with respect to controls, both in mined and in still green portions of attacked leaves. In July and August, thehydraulic resistance of infested seedlings ... leaves and in green and mined portions of infested leaves, respectively(Fig. 3). In September, gL decreased to about 60 mmol m–2 s–1both in control leaves and in green portions of infested ... [2]. In ouropinion, the observed increase of Rleaf, Rpetiole and Rcy-stem in horse chestnut seedlings has to be interpreted as evidence of anticipated leaf senescence in infested seedlings...
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Báo cáo lâm nghiệp: "Carbon and nitrogen winter storage and remobilisation during seasonal flush growth in two-year-old cork oak (Quercus suber L.) saplings" pptx

... that in RSAN resulting in a significant decrease in the ratio of the two. 3.4. Seasonal changes in content and partitioning of winter C and N in plantsWinter C and N represent the amount of ... only one study investigated mechanisms of N stor-age and remobilisation in cork oak during winter and followingspring [1] and none considered together dynamics of C and Nduring these periods. ... theremobilisation of winter N from first year leaves suggests thathydrolysis of storage proteins and export of amino acids mayhave occurred [29]. An export of winter C and N was also observed from fineroots....
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Báo cáo lâm nghiệp: "Seasonal variations and acclimation potential of the thermostability of photochemistry in four Mediterranean conifers" doc

... observed in Fv/Fm was due to a decrease in Fm withno increase of Fo, which may be interpreted as indicating areversible increase of thermal dissipation in PS II [2, 7]. Theincrease of Fo ... steepincrease of Fo (Fig. 1), [4].2.3. Seasonal time course of thermostability of photochemistryDuring 2000, Tc was recorded four times (beginning of April,beginning of May, end of August ... larger in Cedrus atlanticathan in the three other species. Tc also displayed a large plas-ticity, increasing during summer and in response to increasingambient temperature. Taking into account...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Diurnal and seasonal fluctuations in the bark respiration of standing Quercus acutissima trees in Nakaizu, Japan" docx

... the stem and on fine days during the growing season.On cloudy and rainy days, the depressionDiurnal and seasonal fluctuations in the bark respiration of standing Quercus ... respiration rate during the dor-mant season and its increase during thegrowing season have been observed in many forest tree species. The increase of respiration rates ... levels during the spring, autumn and winter, and at high levels from June toAugust, except for rainy and cold daysduring the monsoon season. The de-crease in respiration...
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