Báo cáo lâm nghiệp: " Changes of the mixed mountain virgin forest after 70 years on a permanent plot in the Ukrainian Carpathians" pps

... 2006. Changes of the mixed mountain virgin forest after 70 years on a permanent plot in the Ukrainian Carpathians J. V, J. Š, T. K Department of Forest Botany, Dendrology and Geobiocenology, ... beech rotate. In 1934 the stage of disintegration probably pre- dominated in the plot, because total timber volume was rather low and na...

Ngày tải lên: 07/08/2014, 10:22

... expression of the part of the genotypic variance in the total variance, the values are the same as in column 1 of table 3. Broadsense heritability was also estimated in the ... each tree. All observations concerned each ramet of the parents and each sib of the families. 2.3. Variance analy.si.s All data were processed with a...

Ngày tải lên: 09/08/2014, 02:21

... southern England site at Headley, Hampshire, where during the 1988 growing season concentrations of 03 reached 85 ppb on at least 5 occa- sions. aldearave Road. Twickenham TW1 ... that drought may act as an incit- ing factor, accelerating the decline of forest trees exposed to chronic doses of air pollution. For instance, many reports su...

Ngày tải lên: 09/08/2014, 04:20

... halepensis stands along with the increase in the number of fires and burnt surface in Spain, has made appropriate forest manage- ment necessary during the early stages of the pine regenera- tion, since this ... 6 years after fire in Spain due to the small size of saplings at this time. Thinning can be performed with a clearing saw (portable swinging arm scythe) sin...

Ngày tải lên: 07/08/2014, 16:20

... spaced Pi- nus radiata plantation in New Zealand [69] and a Pinus taeda plantation with varying water and nutrition amendments in the southern United States [52]. Our understanding of the seasonal variation ... evaluate monthly and annual leaf area turnover across a range in initial LAI. The goal of this analysis was to test and quantify the re- lationship between LAI an...

Ngày tải lên: 07/08/2014, 16:20

... Thaumetopoeidae) on annual diameter increment of Pinus brutia Ten. in Turkey Mehmet KANAT a *, M. Hakki ALMA b *, Fatih SIVRIKAYA a a Department of Forest Engineering, Faculty of Forestry, Kahramanmaras ... Kahramanmaras cover an area of 192 521 hectares, which corresponds to 6% of the total area of P. brutia forests in Turkey. About 87 600 hectares (45%) of the...

Ngày tải lên: 08/08/2014, 00:21

... (Special Issue): 82–88 in Růžová hora the average decrease was 0 .70 g, in Sněžka 0.81 g (Fig. 5). Changes in the parameters within the years 2004–2006 Data on mycorrhizal status of roots obtained ... 6). Considering the obtained data, it is hard to de- fine why the number of mycorrhizae in the plots dropped after ten years; it concerned the rapid de- cre...

Ngày tải lên: 07/08/2014, 03:22

... stage of budbreak and the beginning of foliage became evident in all monitored species most mark- edly. Because of a rapid increase in temperatures in May 2006, the duration of the stage of the ... onset of phenological stages due to increasing temperatures. CONCLUSION e paper evaluates the results of phenological monitoring of the tree layer in a...

Ngày tải lên: 07/08/2014, 03:22

... threat has been the main reason for initiating activity concerning this issue. A report known as COST 341 was established that presents informa- Evaluation of changes in the landscape management ... occupation of biotopes and agricultural lands due to constructing industrial areas in the motorway’s vicinity, changes in area dimensions of agricultural and forest lan...

Ngày tải lên: 07/08/2014, 10:21

... comparisons of the abundance of the M. hippocastani Fabr. population after swarming in 2004 and 2008 will be clear after we obtain control results of the abundance of the 2 nd instar grubs in 2010. Bulhary ... On the basis of literary data on mass swarming in the past there is an evidence (M 1975) that this tribe has appeared in a cycle of f...

Ngày tải lên: 07/08/2014, 10:21