Báo cáo lâm nghiệp: " Effects of intensive versus no management strategies during an outbreak of the bark beetle Ips typographus (L ) (Col : Curculionidae, Scolytinae) in the Tatra Mts in Poland and Slovakia" ppsx

... content in birch leaves was demonstrated by the analysis of its level in the dry matter of leaves during the spring season. e amount of nitrogen increased nonlinearly with the increasing rate of ... = 0.00 5). Insect attack increased with the increasing mean content of nitrogen in the dry matter of leaves from variant T0 (24.8 mg/g) to variant T2 (32 mg/g) (Fig. 5) while at the nitrogen ... at the significance level α = 0.0 5) between the control (T 0) when leaves of plants got yellow more intensively and variants affected by nitrogen.Selection and consumption of food In a polythene...

... carbon and nitrogen (Figs. 7 and 8) in forest floor occur in the spruce stand. e lowest C/N ratio in forest floor (Fig. 9) occurs under the 110-year spruce stand (26. 0) and in the organo-mineral ... ex-changeable and actual reactions of soil (Figs. 3 and 4) decreased from L to H in all stands. e lowest values in forest floor (4.0 and 3. 4) and in the organo-mineral horizon Ah (3.7 and ... range from 34.9% (beech stand) to 41.3% (spruce stand), for humus layers L, F and H from 3.3% (spruce stand) to 4.0% (beech stand) in the organo-mineral horizon Ah.e highest reserves of...

... substratescommonly used in the nursery: ( 1) a mixture of peat and vermiculite(p/v) 1:1 (v:v) and ( 2) a mixture of peat and composted pine bark (p/pb) 1:1 (v:v) (see Tab. I for substrate analyses). The peat ... (Figs. 2a and 2b). Tabl e II. ANOVA significance levels for the factors inoculation (A) and type of substrate (B), and interaction between them (AB) for differentgrowth parameters of Pinus pinea ... Effect of inoculation and the type of substrate on the con-centration of nutrients in needles of containerised P. pinea seedlings.p/v = peat/vermiculite ( 1:1 , v:v); p/pb = peat/pine bark ( 1:1 , v:v)....

... studied the correlation existing between the annual and the seasonal rainfall and the annual trunk growth, and the only correlation shown is that of the rainfall values in the springseason, there ... thatenough water is supplied with the normal rainfall [23, 25] and so that they can handle a cloudburst originating a great runoff[1, 21]. On the other hand, the banks must have overflow chan-nels ... is no correlation between the growth of the rings and the rainfall in any other season or the annual total. Figure 6shows the relationship between these two variables; springrainfall and ring...

... length and number of nodes of the largest (max .) offspring shoot, the MDR, MLR and MNR, and the sums of offs-pring-shoot diameters, lengths and numbers of nodes for experiments 1, 2 and 3 (see ... (Figs. 1 and 2) and the following treatments applied in August 2000 (mid-winter), before the beginning of the 2000–2001 growing season: (t. 1) clipping (with sur-gical scissors) of the distal ... applied in other treat-ments of the same experiment, increased the differences in length and number of nodes between the largest offspring shoot and the corresponding mean for all other offspring...

... 2). No seedlings initiated the third flushunder HS and MS while 21 and 71% of seedlings initiated the third flush under LS and FL, respectively. Light level affected (p < 0.00 1) the RCD and ... photochemical quenching (qP ); (B) non-photochemical quenching (NPQ); (C) quantum yield of PS II (φPS II ); and (D) electron transport rate (ETR). The symbols are full light ( ), light shade ( ), medium ... shade ( ), and high shade (z). The data aremean values (n = 6) ± SE.Figure 4. The approximate redox state of the primary electron accep-tor (1–qP ) and the electron transport rate (ETR). The...