Báo cáo lâm nghiệp: "Mycorrhizal associations of nursery grown Scots pine (Pinus sylvestris L ) seedlings in Poland" ppt

... 10.1051/forest:2006052 Original article Mycorrhizal associations of nursery grown Scots pine (Pinus sylvestris L. ) seedlings in Poland Michał I ´ ,MariaR * ,TomaszL  Institute of Dendrology, Polish ... containerized seedling nurseries [32]. Similarly, Menkis et al. [38] found nine mycorrhizal species colonizing Scots pine seedlings in bar...

Ngày tải lên: 07/08/2014, 16:20

... and Korban [18]. Valdés et al. [19] suggested that a decrease of en- dogenous cytokinins levels may be involved in loss of shoot- forming ability in the apical portions of stone pine cotyledons. On the ... salgareño pine (Pinus nigra Arn ssp. salzmannii (Dunal) Franco), In Vitro Cell Dev. Biol. Plant 32 (199 6) 109−114. [10] Martinez-Pulido C., Harry I.S., Thorpe T.A.,...

Ngày tải lên: 07/08/2014, 16:20

... determine optimal dates of conversion of Scots pine stands growing at unsuitable sites in conditions of the Polish Lowland. The analysis was performed taking into consid- eration exclusively economic ... Direc- torate of the State Forests in Poznań allowed drawing the following conclusions: – With the passage of time, changes in the mean volume of Scots pine sta...

Ngày tải lên: 07/08/2014, 03:22

... qual- ity of wood, lock and cutting angle of knives, angle of the contact, cutting speed, length of the slotted hole and feeding speed of wooden mass at chipping (B 200 1). e cutting tools, ... 196 4). According to Lisičan there are ordinary values of angular knife parts (α, β, ) defined from the fol- lowing criteria: – kinematic ( ) – technological ( ) e k...

Ngày tải lên: 07/08/2014, 10:21

... 210–215. [28] Li B., Mckeand S.E., Allen H .L. , Seedling shoot growth of loblolly pine families under two nitrogen levels as related to 12-year height. Can. J. For. Res. 21 (199 1) 842–847. [29] Li L. , Wu ... meters of softwood sawlogs and veneer logs, valued at $460 millions at the mill gate annually [1], radiata pine logs currently contribute more than 70%. Radiata pine is i...

Ngày tải lên: 07/08/2014, 16:20

... carpinifolia were not collected. In all the plots, age- structure of saplings showed a bell-shaped curve, indicating that the establishment process of the NR was not continuous but temporally limited ... analysis of natural regeneration Figure 3 shows the values of L( d) as a function of the distance calculated for all NR and for each species separately. All the individuals of...

Ngày tải lên: 08/08/2014, 00:22

... thinning and the first final cut, i.e., number of years since previous thinning (Y), remaining basal area after thinning (Gr) and years since last thinning to the first final cut (Yc), were independently ... pre-commercial thinning (dashed line), three commercial thinnings (thick solid line) and three regenerative cuts (thin solid line) on site index 24 m (at 100 years) by using the SPINE s...

Ngày tải lên: 08/08/2014, 01:21

... dei loro simbionti. V. La Cocciniglia del Noccinolo (Eulecanium coryli L. ). Bollettino del Laboratorio di Zoologia Generale ed Agraria, Portici, 13: 127–190. STREJČEK J., 1990. Brouci čeledí ... Zvolen, Institut für Waldökologie der Slowakischen Akademie der Wis- Fig. 3. Flight activity of Anthribus nebulosus males (white column) and females (black column) in Cikháj in 2006 Fig...

Ngày tải lên: 07/08/2014, 03:22

... of wild individuals. To collect adults of I. typographus, 5 pheromone traps were installed in central Slovakia in spring, which were baited by pheromone dispensers. In the peak of spring flight, ... and forest decline in Central Europe. Environmental Pollution, 90: 171–180. LINDELÖW A., SCHROEDER L. M., 2001. Attack dynamic of the spruce bark beetle (Ips typographus L....

Ngày tải lên: 07/08/2014, 03:22

... numbers of sterile individuals (mostly males). When there is a high flooding ratio of sterile over feral individu- als in the field, and the sterile individuals are fully competitive, the probability ... effect of treatment on basic rearing parameters – (a) galleries per log, (b) mating chambers per log, (c) galleries with mother tunnels, (d) galleries with larvae tunnels, (e) mother...

Ngày tải lên: 07/08/2014, 03:22