Báo cáo lâm nghiệp: "Growth trends reveal the forest structure during Roman and Medieval times in Western Europe: a comparison between archaeological and actual oak ring series (Quercus robur and Quercus petraea)" pot

... Western Europe: a comparison between archaeological and actual oak ring series (Quercus robur and Quercus petraea) Kristof HANECA a *, Joris VAN ACKER a , Hans BEECKMAN b a Ghent University, Department ... three archaeological sites in Flanders. N: number of tree -ring series. AV. No. TR, AV. RW and AV. STDEV: the average number of tree rings,...

Ngày tải lên: 08/08/2014, 00:22

... every 20 days during spring and summer and every three months during fall and win- ter. Temperature at the soil surface was measured between 14:00 and 14:30 h, and ST-5, ST-20, and ST-30 between ... temperate, with 75% of the annual precipitation falling between April and September (late fall and winter in the Southern Hemisphere). Spring and summer are gen...

Ngày tải lên: 08/08/2014, 00:22

... is the main goal of breeding research programmes (S et al. 2001). Many authors investigated anatomical and physi- ological characteristics, assuming that they have an important in ... wind 'CZ-257' P-535 P. angulata 'Törökfay' × nigra 'CZ-1047' P-540 P. angulata 'Törökfay' × nigra 'CZ-919' P-608 P. angulata 'Törökfay'...

Ngày tải lên: 07/08/2014, 10:21

... experiment at my disposal and for their assistance in constructing the wooden frames of the nets and measuring the seedlings. I also thank K. Thoroe for measuring the dry masses of the harvested seedlings ... 10.1051 /forest: 2003009 Original article Growth and biomass partitioning of Fagus sylvatica L. and Quercus robur L. seedlings in response to shading and smal...

Ngày tải lên: 08/08/2014, 01:21

... 1, 1996), these seedlings were then cut at the root collar, and the root sys- tem was extracted from the container and hand washed. The shoot was separated into needles and stem. The needle, stem and ... For example, with the medium application rate the variation in diameter, height and total mass between FR, MR and SR was much smaller than that with the low a...

Ngày tải lên: 08/08/2014, 01:22

... of mass swarming of M. hip- pocastani in the Vracov locality, we recorded and evaluated the daily maximal, minimal and average temperatures using an automatic meteorological station of the ... regions. In the 3-year developmental cy- cle the first moulting takes place as soon as in the year of hatching and already in the advanced sec- ond stage the larvae wint...

Ngày tải lên: 07/08/2014, 03:22

... communication). These infestations vary in time and place, but they are generally spatially related with actual outbreak areas, where beetles subsequently attack even pine due to the host plant ... consequently infested by I. duplicatus during summer (July–September 2007); a similar pattern could be applied to the findings in Poland, next to the outbreak area (G...

Ngày tải lên: 07/08/2014, 03:22

... et al. 1998). e purpose of the contribution is to evaluate the stand-forming capacity of wild cherry as well as its capacity to keep its position in a stand. MATERIAL AND METHODS A large stand ... as a stand- forming species in the area of Demonstration Forests in Kostelec nad Černými lesy in the mixture with other species was found. e stand 3 9A5 is located at 4...

Ngày tải lên: 07/08/2014, 03:22

... ash maple oak lime larch fir goat willow pine spruce Area (%) Tree species repeated reforestation (% stands) damage (% stands) repeated reforestation (% stands) damage (% stands) repeated reforestation (% stands) damage ... period; and also long-lasting snow cover. e current approach of forestry practice to damage by small mammals is considerably passive and we are missing an alert sy...

Ngày tải lên: 07/08/2014, 03:22

... borne in mind when discussing silvicultural treatments in a pedunculate oak stand and their in uence on the relations in the stand, and especially in the soil. e type and intensity of the changes ... the possibility of water trans- port, and are suitable for agriculture and pasturage in particular. Forest stands were gradually cleared and converted to...

Ngày tải lên: 07/08/2014, 03:22