Báo cáo lâm nghiệp: "in dormancy breaking of tree seeds" pptx

... in dormancy breaking of tree seeds Z. Szczotka U. Lewandowska Institute of Dendrology, Polish Academy of Sciences, Kornik, Poland Introduction Work connected with the role of ... of dormancy breaking of Acer platanoides and Fraxi- nus excelsior seeds (in the initial stage) has proceeded in two directions: 1) studies of changes in the con...

Ngày tải lên: 09/08/2014, 04:20

... earlywood of the next tree ring (Fig. 3). Because of the variability of IADFs tangentially and vertically within tree rings along the stem [34], an IADF was identified only when both cores from a tree ... is > 0.85 (number of trees needed). Table II. Summary of the regression coefficients expressing the effects of climatic factors on chronologies of Pinus pinea. The signal...

Ngày tải lên: 07/08/2014, 16:20

... Rooting of mes- quite (Prosopis) cuttings. J. Range Manage. 34, 466-468 Goyal Y. & Arya H.C. (1984) Tissue culture of desert trees: 1. Clonal multiplication of Proso- pis ... concen- trations of BA, but not of K in combination with auxins, promote shoot proliferation probably by stimulating axillary bud growth. Medium to high concentrations...

Ngày tải lên: 09/08/2014, 04:20

... the point where the maximum of demand function crosses the C; regulation line. We can observe that, if WUE of maize is higher than the WUE of lilac or potato, the junction ... & Slatyer R.O. (1965) Effect of atmospheric concentration of water vapor and C0 2 in determining transpiration photosynthe- sis relationship of cotton leaves. Agr...

Ngày tải lên: 09/08/2014, 04:20

... Roberts, 1979). The aim of the present study was to analyze the germination of some recalci- trant seeds of tropical forest trees, and the effects of dry and wet storage ... Germination and storage of recalcitrant seeds of some tropical forest tree species F. Corbineau D .Côme Laboratoire de Physiologie des Organes ... tropical or subtropical...

Ngày tải lên: 09/08/2014, 04:20

... increase of the size of salvage cuttings (including the removal of in- fested trees) the area of stands affected by the forest decline increased too (Fig. 2). In 2003 (the first year of the last ... number of injurious fac- tors with varied duration and intensity of impact. ese factors can be of specific nature, related to the specific properties of stands or the site condi...

Ngày tải lên: 07/08/2014, 03:22

... Outbreaks of Cephalcia spp. (Hymenoptera, Pamphiliidae) in spruce stands on the territory of the Czech Republic. In: BRUNNHOFER V., SOLDÁN T. (eds), Book of Abstracts. VI th European Congress of ... or the end of July with exception of C. arvensis which was sampled even in August. Not recorded species of Cephalcia ree species of the genus Cephalcia known from the terri...

Ngày tải lên: 07/08/2014, 03:22

... methods of assess- ment of risk caused by these insects (K, K 1995; J 1999). is paper presents the current state of knowledge about the occur- rence of individual species of ... Hymenoptera. In: RAZOWSKI J. (ed.), Checklist of animals of Poland. Cracow, Institute of Systematics and Evolution of Animals Polish Academy of Sciences, 5: 7–160. ĆWIKLIŃS...

Ngày tải lên: 07/08/2014, 03:22

... dif- ferent systematic samples of varying size, that is, 64 samples of size 100, 32 of size 110, and 4 of size 121. In sampling a nonrectangular area, variability of the sample size will further ... differences. us, the component of variability associated to the variability of the sample Table 4. Characteristic values of random – y st.post Sample size n Number of r...

Ngày tải lên: 07/08/2014, 03:22

... domination of Uropo- dina mites was increased and domination rate of Parasitidae mites was decreased. Similar results of the reaction of this group of mites to increas- ing amount of broadleaves in tree- stands ... where: s – number of specimens of species, S – number of specimens of all species in this cenotic unit; a cluster analyze of similarity rates for the domi...

Ngày tải lên: 07/08/2014, 03:22