Báo cáo lâm nghiệp: "Determination of the pressing parameters of spruce water-resistant plywood" ppt

... comprise the following parameters: density of active and non- active mycorrhizae, their ratio, the total number of mycorrhizae, weight of dry matter of roots up to 1 mm, numbers of mycorrhizae ... (about 1 m) from the stem of five selected trees. e cylinder of the soil probe used for this purpose had the inner diameter of 6 cm and the height (depth of space...

Ngày tải lên: 07/08/2014, 03:22

... factors, other than the effects of shade, were small so that the major variable affecting sapling growth was the quantity of light (L 1969). In full light, the lag between monthly hours of sunshine ... third replicate was kept in the event that the extraction of one of the two selected saplings was accidentally lost. e main experimental limitation was the cos...

Ngày tải lên: 07/08/2014, 10:21

... (54% of trees, 40% of basal area at the age of 16 years) represented a loss of ca 8.7 thousand kg/ha of total biomass, which contained 53 kg of N, 5 kg of P, 22 kg of K, 26 kg of Ca and 4 kg of ... are in the Krušné hory Mts. (Northern Bohemia), which have been considered as one of the most heavily air-pol- luted areas since the sixties of the last century...

Ngày tải lên: 07/08/2014, 10:21

... Sicily and particularly in the south-eastern part of the island, close to the Etna region. Haplotype 6 characterises the south-western part of Sicily, including the island of Pantelleria. One individual ... haplotypes, whose occurrence in the different areas may be ascribed either to the presence of the same haplotype in the two different ref- ugia, or to the migr...

Ngày tải lên: 08/08/2014, 00:21

... (A–t). Determination of the percentage of PF resin hardening e aim of studying the character of PF resins in the field of UV spectrum was to determine the amount of the insoluble proportion of a heat-hardened ... tolerate Supported by the Ministry of Education, Youth and Sports of the Czech Republic, Project No. MSM 6215648902. Determination of the press...

Ngày tải lên: 07/08/2014, 03:22

... evaluate the close- ness of the nutrient status of the spruce stands and to assess the closeness of chemical properties of the studied sites. e results were tested by PCA. To test the homogeneity ... connection of roots with the soil as well as with the other tissues of the plant is related to soil water-holding capacity and to the potential of ion exc...

Ngày tải lên: 07/08/2014, 03:22

... meas- urements. Within the analysis of the hypothesis of the dependence of dieback of subdominant trees standard parameters of differences between upper and lower limits were used. If the population ... Europe, it is known as the “Adamov population of larch” (accord- ing to one of the municipalities of the region). Supported by the Ministry of Education,...

Ngày tải lên: 07/08/2014, 03:22

... in the unmixed beech stand (22.0 t/ha). e mixed stand of spruce with beech and the spruce stand repre- sent a mean between the stands. – e active soil reactions of forest floor of the spruce ... can conclude that the reserve of the mixed stand of spruce with beech approaches more the unmixed spruce stand than the unmixed beech stand. We can state that...

Ngày tải lên: 07/08/2014, 03:22

... century and at the beginning of the 20 th century might be a reaction to the closure of pasturing and timber harvesting (V 1994) in conjunction with the long-term effect of spruce monocultures, ... Bavarian Forest (W, E 2004) and the northern part of the Czech Republic (K 2002). In the Bohemian Forest Mts., the negative effects of atmosph...

Ngày tải lên: 07/08/2014, 03:22

... and also in the other types of low altitude forests (e.g. Z 1973). In all of them Cg is one of the dominant species. In our study we concentrated on the study of the population of this species ... RB with the mosaic of forests of various age catego- ries as well as small open areas. is was the locality with the highest abundance after the seed year. We...

Ngày tải lên: 07/08/2014, 03:22