Báo cáo lâm nghiệp: "Influence of the moisture content of forest tree its response to different viability tests pollen on" pdf

... than the best one. a Data from unpublished results. b Hydration of pollen at 100% RH for 16 h at 25’C. Influence of the moisture content of forest tree pollen on its response ... Conclusion Correlating the response of a particular pollen lot to in vivo fertility is largely dependent upon its moisture content. Since most lots...

Ngày tải lên: 09/08/2014, 04:20

... 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 ... approximately in the same distance (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 c...

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 ... insects, and frost da- mage. During the breaking of dormancy in spring, the removal of inhibitory guanidino compounds provides sources of N for the renewed synthesis of...

Ngày tải lên: 07/08/2014, 10:21

... air-pol- luted areas since the sixties of the last century. In the Forest Region of the Krušné hory Mts., the substitute tree species stands took up about 36% of forest land area (UHÚL 2007), ... removal of aboveground biomass (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 contai...

Ngày tải lên: 07/08/2014, 10:21

... 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 migration that took place through the Adriatic bridge ... because they had completely different haplotypes. These results strongly support the hypothesis of glacial refugia existing in southern Italy, and underli...

Ngày tải lên: 08/08/2014, 00:21

... matter of assimilatory (leaf) tissues. A composite sample of leaves from each variant was taken in the period from mid-August to the beginning of Sep- tember, when the aboveground parts of the trees ... Nonetheless, if the amendment is applied at the time of planting, the fertilizing stimulus is able to increase the survival rate (K et al. 2008). As for...

Ngày tải lên: 07/08/2014, 04:20

... processed files of the mensurational characteristics consist of the data only that are related to the trees surviving in the autumn of 2004, the data belonging to the dead trees were retrospectively ... formed: the 0 to 10 cm composite and the 10–20 cm composite. is limited number of composites per variant was taken in order to avoid damage to the root...

Ngày tải lên: 07/08/2014, 10:22

... measured the radial variation in flow within the xylem in detail in several different tree species. Alto- gether, the peak of the Weibull function and the peak of SFD day at intervals of 20 mm ... propose different types of response with depth in the trunk are resolved. Considering that the theoretical response with depth described by the Weibull function per...

Ngày tải lên: 08/08/2014, 00:21

... the occurrence of other pollu- tant substances, or across microfissures of the cuticle, caused by the insects, the ac- tion of phytopathogen organisms or the im- pact of ... order to determine the sorption of LABS into the different sampled fractions of the plant (epicuticular wax, dewaxed needles or branches without needles and...

Ngày tải lên: 08/08/2014, 18:21

... mid- August. Chlorophyll content The chlorophyll content of early leaves was also influenced by the light conditions of year n (Fig. 1 For the 1 st harvest of early leaves, the highest ... (structure, anatomy and chlorophyll content) agree and demonstrate that the light conditions to which plants have been exposed have an influence on...

Ngày tải lên: 09/08/2014, 04:20