Báo cáo lâm nghiệp: "Density of juvenile and mature wood of selected coniferous species" pdf

... 123–130 123 JOURNAL OF FOREST SCIENCE, 57, 2011 (3): 123–130 Density of juvenile and mature wood of selected coniferous species V. G, H. V, K. H Faculty of Forestry and Wood Technology, ... objective of research was to determine the density of juvenile (JW) and mature wood (MW) of selected coniferous species growing in the Czech Republic....

Ngày tải lên: 07/08/2014, 10:21

... region of Krušné hory Mts. and in the region of Bohemian-Moravian Upland or in a mu- tual comparison between the two regions (see stand situation 5, mutual comparison of stand situation 2 and ... the rooting depth and the length of horizontal roots – a Table 4. Vitality and mycorrhizal infection of fine roots Stand marking Month of sampling Mycorrhiza type Vitality...

Ngày tải lên: 07/08/2014, 04:20

... Fors- chung, Band 5, Freiburg i. Brsg., 1999, 190 p. [25] Nutto L., Spiecker H., Production of valuable wood: a software aided decision tool for managing oak stands in Europe, in: Impro- vement Of Wood ... agricultural land and pasture as well as wood for construction and other purposes led to the large-scale exploi- tation and destruction of these forests. By 1980 less than...

Ngày tải lên: 08/08/2014, 00:21

... eigenvalues of the m first axes of CCA are to the m first axes of CA, the greater the efficiency of environmental variables and the closer e m is to 1. The efficiency of the different sets of environmental ... higher in the west of the mountain crest than in the eastern side, leading at a value of –20 mm of WB deficit in June for 400 m of altitude in the west side of...

Ngày tải lên: 08/08/2014, 00:22

... Canary Islands: I. The site, stand struc- ture and stand leaf area distribution, Trees 11 (1996) 34–40. [40] Mousseau M., Effects of elevated CO 2 on growth, photosynthesis and respiration of sweet ... resource use capacity of C. sativa in older cop- pices, in accordance with the results of Deweirdt and Carlier [16]. The study of variations of leaf morphology in response to...

Ngày tải lên: 08/08/2014, 00:22

... of the burned area and the need to replace the traditional exploitation of wood in the pine forests, have promoted extensive land use changes involving the conversion of 2365 ha of post-fire woodlands ... other periods of the year, and even did not recover in the case of crown pro- jection (Fig. 3). Concerning the comparison between Q. ilex and Q. cerrioides, RGR of numbe...

Ngày tải lên: 08/08/2014, 00:22

... between 50 and 165 y, stands shifted from being deciduous to coniferous dominated. The ratio of softwood to hardwood basal area increased from 0.03 in a 16 y stand to 17.0 in a 172 y stand. Populus ... encompasses 315 000 ha in the mixedwood section of the boreal forest. PAMF includes land situated within a National park, a reserve land, and a Crown land. The selected stands spann...

Ngày tải lên: 08/08/2014, 01:22

... asso- ciated with land clearing, the charcoal iron industry, tanbark and chemical wood cuts and lumbering of high quality hardwood and conifers (eg, P strobus and Tsuga canaden- sis) ... eastern and western extension of the oak-hickory asso- ciation, and includes a codominance of Pinus and Quercus recruitment stopped, while that of A rubru...

Ngày tải lên: 08/08/2014, 18:21

... Sap flow and climate data of 1990 were used to calibrate the model of transpiration and data of the following years for its validation. RESULTS AND DISCUSSION Effect of global ... gc The role of water supply in controlling canopy conductance was investigated from observed values of gc in both control and dry plots, during a period of...

Ngày tải lên: 08/08/2014, 18:21

... ambigu- ity, lack of objectiveness and incoherency of opin- ions and attitudes of the respondents, possibly caused by ignorance and misinformation brought about by school education (and education ... importance in selected areas of the Forests of Czech Republic, state enterprise. [Research Report.] Prague, Czech University of Life Sci- ences Prague, Faculty of Fores...

Ngày tải lên: 07/08/2014, 10:21