Báo cáo lâm nghiệp: "The role of Hylastes cunicularius Erichson (Coleoptera: Scolytidae) in transferring uropodine mites in a mountain spruce forest" pptx

... importance of the passive transfer of uropo-dine mites assisted by H. cunicularius cannot be overlooked in mountain spruce forests in the Tatra Mountains and, possibly in other mountain areas in ... e role of Hylastes cunicularius Erichson (Coleoptera: Scolytidae) in transferring uropodine mites in a mountain spruce forestB. K, P. Z, J. K Department of Animal Ecology, Institute ... of Forest Ecology, Slovak Academy of Sciences, Zvolen, SlovakiaABSTRACT: e bark beetle Hylastes cunicularius was studied in the Tatra Mountains, West Carpathians, to clarify its role in transferring...

Báo cáo lâm nghiệp: " The role of glutamine synthetase, glutamate synthase and glutamate dehydrogenase in ammonia assimilation by the mycorrhizal fungus Pisolithus tinctorius" ppt

... there was noincorporation of ammonia into glutamateAmmonia was assimilated primarily intothe amide of glutamine by the activity of GS, and transferred to glutamate-aminoby ... a lag in GS inhi-bition by MSX. The increase in theglutamate pool appeared to indicate assi-milation of ammonia into glutamate byGDH activity.Inhibition of glutamate ... to contain signifi-cant amounts of arginine, which is thoughtto play a major role in nitrogen storage.Arginine was the most abundant aminoacid in the nitrogen-starved...

Báo cáo lâm nghiệp: "The effects of transplanting stress on photosynthesis, stomatal conductance and leaf water potential in Cedrus atlantica Manetti seedlings: role of root regeneration" pdf

... seedlings, a markedand parallel decline in both C02 assimila-tion and stomatal conductance occurredfrom day 0 to day 9 after transplanting(Fig. 1a and b); afterwards ... transplanted plants was accompa-nied by an almost constant ci (Fig. 2), thusindicating that, despite the parallel evolu-tion of A and gs, the changes in Aweremainly ... an alteration of mesophyllphotosynthetic capacity.The effects of transplanting stress on photosynthesis,stomatal conductance and leaf water potential in Cedrus atlantica...

Báo cáo lâm nghiệp: "The results of manipulated experiments with inoculation of Ips typographus (L., 1758) to spruce trees under various levels" potx

... envi-ronment and later transported to lab. After several days, the number of individuals was enough high to establish artiﬁcial rearing.Laboratory rearing of I. typographus. e rear-ing cages were ... 9–15.JAKUŠ R., 1998. Types of bark beetle (Coleoptera: Scolytidae) infestation in spruce forest stands a ected by air pollution, bark beetle outbreak and honey fungus (Armillaria mellea). Anzeiger ... 171–180.LINDELÖW A. , SCHROEDER L.M., 2001. Attack dynamic of the spruce bark beetle (Ips typographus L.) within and outside unmanaged and managed spruce stands after a stormfelling. In: KNÍŽEK...

Báo cáo lâm nghiệp: "The influence of irradiation on the behaviour and reproduction success of eight toothed bark beetle Ips typographus (Coleoptera: Scolytidae)" doc

... fewer larvae hatched than in control treatments. It would seem that the irradiated males reached a lower reproductive rate than the control males.n ȱ=ȱ5 a a a a a a a a a a a a a a a 0246810121416Galleries ... parameters in irradiated and control treatments (mean value per log ± standard devia-tion). e bars flagged with different letters are significantly differentn ȱ=ȱ5 a a a a a b a a a ab a a a a01020304050607080Size of matingchamberȱ(mmȱ)Lenght of mothertunnelȱ(mm)Number of eggsȱpermotherȱtunnelNumber of larvaeperȱmotherȱtunnelȱLenght of larvaetunnelȱ(mm)Control15Gy30Gy2J. ... start of prepara-tion of entry holes was almost the same for both irradiated and non-irradiated males. In spite of the fact, that the irradiated males walked a sig-nificantly longer distance...

Báo cáo lâm nghiệp: "The use of silica sand in micropropagation of woods" pot

... 1999).Paradoxically, in agar media it grows best if there is manifest attenuation and acidification as a result of hydrolysis of the agar. Overall, the degree of hydroly-sis of agar and the characteristics ... 4.5.RESULTSComparing cultures in sand and in agarAfter the completion of cultivation, it was de-termined that when using sand, the starting pH of 5.8 remained essentially unchanged (final pH 5.6). Media ... that after autoclaving agar in flasks was at various degrees of liquidity. is was apparently interrupted by hydrolysis.Methods for propagation were compared statisti-cally and an evidential...

Báo cáo lâm nghiệp: "The effect of point application of fertilizers on the soil environment of spread line windrows in the Krušné hory Mts" docx

... (P et al. 2004).It is to suppose that the aerial application of surface liming may be one of the causes of imbalances in the availability of the studied bases. It mainly a ected natural processes ... ac-cording to characteristic absorbances in pyrophos-phate. Carbon contained in humic acids (hereinafter C-HA) and carbon contained in fulvic acids (herein-after C-FA) were detected. Based on ... between avail-able potassium and mobile aluminium. e relation-ship of Al to univalent base cations is antagonistic. e risk of a negative eﬀect of Al becomes higher at a decrease in the content...

Báo cáo lâm nghiệp: "The proposal of biotic hazard zones in selected spruce dominated regions in Slovakia" pptx

... 236–242ble 3). e main part has a semi-arch shape and it spreads in the surroundings of the Oravská kotlina and adjacent lower massifs of Skorušina, Oravská Magura and Podbeskydská vrchovina Mts. The ... from spreading to zone B. We also recommend the rests of non-infested stands to re-main as a source of attractive material on the margins of the A zone. e allocation of chemically treated trees ... several foci in the eastern part. ese appeared mainly in 2002–2003.e Orava regionZone A covers 23% of the total area of the region and 21% of spruce stands in the region (Fig. 3; Ta-Fig....

Báo cáo lâm nghiệp: "The influence of selected factors on energy requirements for plain milling of beech wood" ppsx

... most intensive above 30 ms–1 ; an increase in the value of the rake angle causes a decrease in cutting input. So, with regard to the acquired results of cutting input, in plain milling it ... vf, and on the tool angular geometry of a milling machine in the process of plain milling. Another goal of the experiment was the determi-nation of bulk density of individual beech assort-ments ... cutting inputs in milling of beech wood with and without false heart is negligible.With the increasing feed speed, the cutting input also increases, as well as with an increase in cutting...

Báo cáo lâm nghiệp: " The response of weevil communities (Coleoptera: Curculionoidea) to the altitudinal zones of beech stands" ppt

... explained more variability than the canonical axis in all cases and the explanatory eﬀect of each AZ was signiﬁcant (P ≤ 0.001). Explanation by the particular axes for all investigated AZ was ... axis (axis 1) explained 26.1%, axis 2 explained 68.5% and axis 3 explained 65.8% of total variability in the species data. 9.4% of total variability in the species data was explained by axis ... aspect of normal-ity of data by means of Shapiro-Wilkes W test from STATISTICA Cz 7.1 software. All data were also tested in CANOCO for Win-dows 4.5. Canonical Correspondence Analysis (CCA) was...

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