Báo cáo lâm nghiệp: "of stem cuttings of Populus x euramericana under different water potentials" ppt

... potentials in leaves of man- groves and some other plants. Proc. Natl. Acad. Sci. USA 51, 119-125 Rooting of stem cuttings of Populus x euramericana under different water potentials S. ... and control of plant water potential during the rooting of cuttings. The present studies were under- taken to examine rooting as influenced by in...

Ngày tải lên: 09/08/2014, 04:20

... active stem lesions on some of the trees and plated on selective medium (20 g x L -1 agar; 15 g x L -1 malt extract; 400 μL x L -1 pimaricin; 250 mg x L -1 ... a relation existing between the mean of the maxi- mum and minimum daily temperature of the air and the mean of the maximum and minimum daily temperatures of the...

Ngày tải lên: 08/08/2014, 18:21

Ngày tải lên: 07/08/2014, 03:22

... METHODS e assessment of the intensity and dynamics of the dying of stands was carried out on the basis of the data collected in the SILP System (the Information System of State Forests) concerning ... 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 (t...

Ngày tải lên: 07/08/2014, 03:22

... results of rearing: species, taxomonic position of the species, association with H. fraxini and count of emerged individuals Species Taxonomic position Association Count of ♀ Count of ♂ In total Cheiropachus ... were taken 4 chunks of European ash (Fra- xinus excelsior) that were attacked by H. fraxini in Central Moravia. Each chunk was 50 cm long and on average 7.6 cm thick....

Ngày tải lên: 07/08/2014, 03:22

... Fig. 1 and Table 3. e first canonical axis explains 38.8% of variability, both canonical axes explain 53% of variability (Table 2). All axes explain 100% of vari- ability. e whole model was ... specimens of seven species of the genus Cephalcia (C. abietis – 52,127 ex, C. arven- sis – 2,933 ex, C. alashanica – 476 ex, C. alpina + C. annulicornis – 227 + 21 ex; C. erythrogaster –...

Ngày tải lên: 07/08/2014, 03:22

... 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. ĆWIKLIŃSKI L., 1986. Zbadanie ... 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 in...

Ngày tải lên: 07/08/2014, 03:22

... Function Coefficient of determination Coefficients sampling basis a b CW y = a + bx 2 lnx 0.40 0.39 527.25 –4.16 OW y = a + blnx 0.74 0.74 511.75 –57.27 SWL y = a + bxlnx 0.53 0.52 502.76 –16.49 SWR y = a + bx 2 lnx ... diver- gence of rings was set to 5° for testing, the maximum allowed divergence of fibres was also set to 5°. Each sample was marked so that an exact identification of th...

Ngày tải lên: 07/08/2014, 03:22

... or k = 4 systematic samples. In the first case c = 12 and 3 samples of size n = 34 are obtained, in the second case (c = 2) two systematic samples of size 25 and two of size 26 exist. In two ... 100 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 sam...

Ngày tải lên: 07/08/2014, 03:22

... rates of species between microhabitats (Mo): Mo = 2Σxiyi/(Σxa2 + Σya2) where: xiyi – percentage amount of number of species common for both microhabitats, xa, ya – percentage amount of particular ... total number of species; domination rate (D): D = (100s/S) where: s – number of specimens of species, S – number of specimens of all species in this cenotic unit; a clus...

Ngày tải lên: 07/08/2014, 03:22