Báo cáo lâm nghiệp: "Seasonal variations and acclimation pot

Báo cáo lâm nghiệp: "Seasonal variations and acclimation potential of the thermostability of photochemistry in four Mediterranean conifers" doc

... beginning of the steep increase of F o (Fig. 1), [4]. 2.3. Seasonal time course of thermostability of photochemistry During 2000, T c was recorded four times (beginning of April, beginning of ... used in afforestation of moun- tain areas in the southern Alps, Cedrus atlantica Manetti, ori- ginating from Northern African mountains and introduced to the souther...

Ngày tải lên : 08/08/2014, 01:22

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Báo cáo lâm nghiệp: "Seasonal variations in photosynthetic activity of spruces as determined by chlorophyll fluorescence" ppsx

... year needles. The decrease of the Rfd-values in December and March indicated damage of the photosynthetic apparatus, the increase in January (during a warm pe- riod) demonstrated the ... determination of a further stress indicator: the ratio F690/F735 of the 2 fluorescence maxima. The height of F690/F735 mainly reflects the chlorop...

Ngày tải lên : 09/08/2014, 04:20

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Báo cáo lâm nghiệp:"Stand history and its consequences for the present and future dynamic in two silver fir (Abies alba Mill.) stands in the high Pesio Valley (Piedmont, Italy)" potx

... however, essential to the reconstruction of stand history. There are two major limitations to using increment cores in age determination: the difficulty of intercepting the pith at the coring height, and the differences ... sources of independent data do certainly help to delineate the most important features of disturbances that affected the origin and development...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp: "Neuroptera, Raphidioptera and Mecoptera assemblages inhabiting young spruce (Picea abies) forests: dominance structure and seasonal activity patterns" docx

... Hemero- bius pini (Figs. 1a,b) began to appear in the mid of April. e occurrence increases at the end of May what corresponds with the observation of H and V (2002) in spruce forests of ... Twenty-seven species of lacewings, four species of snake ﬂies and four species of scorpion ﬂies were found using the Malaise traps. Consequently, the se...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Seasonal fluctuation in germination of short and longterm stored Norway spruce" ppsx

... out testing of the seed of coniferous tree species, mainly from autumn until late spring. In the time of the greatest crop, when the seed is under processing until the spring, testing of fresh ... 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...

Ngày tải lên : 07/08/2014, 10:21

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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

... top-canopy in spring and winter was the highest in the leaching of basic cations, with a leaching ﬂux of 40.1 and 29.4 meq m −2 , respectively. But the highest leaching in the other two seasons ... 210 and 107 mm yr −1 of the rainfall was intercepted by the top- and sub-canopy, indicating that 15% of annual precip- itation was intercepted by the top-can...

Ngày tải lên : 07/08/2014, 16:20

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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, the hydraulic resistance of infested seedlings ... evaluating growth and mortality of horse chestnut seedlings in natural stands. Acknowledgments: The present study was funded by EU in the framework of the projec...

Ngày tải lên : 08/08/2014, 00:21

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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

... to the Atlantic islands where the weather conditions are milder. There are two main con- straints in the Mediterranean habitat for these plants, cold during the winter and drought during the ... grow- ing in the Canary Islands in order to understand whether the effect of freezing temperatures in the past could be the cause of their present confinement. Chlo...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: " Humus conditions and stand characteristics of artificially established young stands in the process of the transformation of spruce monocultures" pdf

... 215–223 of a forest ecosystem from the point of view of the element cycle preservation in forest ecosystems and maintaining their ecological stability. e condition and form of humus in forest ... decreases the hazard of ﬂoods in piedmont and lowland regions, intercepts consider- able amounts of rainfall water penetrating through crowns of stands and rele...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Occurrence, biology and harmfulness of Galerucella lineola (F.) (Coleoptera, Chrysomelidae)" pps

... area of central and northern Moravia usually at the beginning of May or during the ﬁrst half of May. e beginning and course of leaving the winter habitats are aﬀected by climate and weather. ... Britain and Northern Ireland through western, central and eastern Europe including the European part of the former Soviet Union. In Scandinavia, it occurs in...

Ngày tải lên : 07/08/2014, 03:22

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