Báo cáo lâm nghiệp: "Effect of gibberellic acid and ethephon on the germination of European beech dormant and chilled beechnuts" pptx

... Republic ABSTRACT: The effect of ethephon (80, 100 and 120 mg·l –1 ) and gibberellic acid (GA 3 ) (40, 300 and 1,000 mg·l –1 ) on the germination capacity (GC) and mean germination time (MGT) of European beech ... of the present paper was to deter- mine the effect of gibberellic acid and ethephon on overcoming beechnut dormancy and stimulati...

Ngày tải lên: 07/08/2014, 10:21

... concerning the significance of the individual species is in contradic- tion with the information the foresters provided on the distribution of damage which is the greatest on grass-covered clearings ... damage they cause. At the beginning of the research, we conducted a survey among foresters in the form of a questionnaire with the aim to find out how they p...

Ngày tải lên: 07/08/2014, 03:22

... of the influence of acid rain on mycorrhizae of P halepensis. The study reported here concerns the ef- fect of acid deposition as simulated acid rain on the formation ... the end of the experiment all plants were harvested and the percentage of mycorrhization determined. Due to the short duration of the ex- periment in com...

Ngày tải lên: 08/08/2014, 18:21

... skidding track, the only one of all of them, is situated perpendicularly to the direction of prevailing winds, in contradiction to plot 3 where the skidding track follows the direction of prevailing ... 323–329 confirmed under conditions of this investigated locality. CONCLUSION Based on the analysis of a part of results from the international IUFRO trial CZ...

Ngày tải lên: 07/08/2014, 03:22

... average, the increment index of spruce increases the most, almost by 0.13%. It is only a half of this value for oak and beech. Precipitation from the sec- ond half of the vegetation period of the ... precipitation of the actual year is most significant for 100% of trees and for almost 80% of trees in this stand, and only for 10% or 5% of trees the prec...

Ngày tải lên: 07/08/2014, 10:21

... 1995). They also confirm an assumption that in the process of adaptation to adverse environmental conditions at higher altitudes spruce populations gain their resistance to the account of growth ... to the develop- ment of seedlings of standard and large dimensions. MATERIAL AND METHODS Seeds used for the cultivation of planting mate- rial originated from the spruce...

Ngày tải lên: 07/08/2014, 10:21

... temperature and rainfall during the five years of study with Pearson correlation based on a significance level of 5% with the t test. The effect of age of the plantation on monthly mean annual number of ... Gerais, Brazil where they were counted and identified by comparing them to individuals of the Museum of Entomology of the UFV and of other centres...

Ngày tải lên: 08/08/2014, 00:21

... diameter increments in the pine trees are considerably affected by the defoliation of the larvae, P < 0.05. The results of Tukey’s mean separation test for the diameter increment of the both control and defoliated ... of the pine tree measured at the end of the vegetation period of each year and D 1 is the diameter of the tree meas- ured at the be...

Ngày tải lên: 08/08/2014, 00:21

... between the T and the WT at the end of the trial (Oct. 2002), that was greater in the WT. From the beginning of the plantation, the N showed significant differences between the T and the WT. ... extreme ecological conditions, which, together with the advanced meth- ods that are being obtained for its reproduction in the nursery, widens the scene for the con...

Ngày tải lên: 08/08/2014, 00:22

... dynamics showed the transformation of secondary stand with domination of aspens into the stand with dominant spruce and significant admixture of alder in wet part of the experimental plot. 3.5. Comparison of ... certain different proportions and with admixture of some other deciduous species are typical in the region of the southern European taiga. The area of...

Ngày tải lên: 08/08/2014, 00:22