Báo cáo lâm nghiệp: "Quality of wood in the stands of poplar clones" docx

... 9 JOURNAL OF FOREST SCIENCE, 54, 2008 (1): 9–16 In wood production not only the quantity is impor- tant but also the quality of wood is of increasingly growing importance. Higher-quality wood has the ... Forest Research Institute in Zvolen, Zvolen, Slovakia ABSTRACT: e results obtained in research on the quality of raw timber by means of the structure of as...

Ngày tải lên: 07/08/2014, 10:21

... occurs in the cooler region of the eastern Eurasian continent, extending across the coastal areas of eastern Rus- sia, the Korean Peninsula, and the eastern portion of northeastern China (N, ... 291 results indicate that the selective logging altered the species composition by decreasing the number of larger trees, leading to a significant increase in s...

Ngày tải lên: 07/08/2014, 03:22

... in the research area, mean values of the estimate of the red deer population density were deter- mined in the Jelení hora hunting district in 2007 and 2008 using the FSC method, viz 24 ± 23 individuals·km –2 ... us, it takes into account only really present pel- lets on the given plot during a certain period. Nevertheless, the problem can consist in the proper d...

Ngày tải lên: 07/08/2014, 10:21

... The numbers beside some symbols indicate the means of the daily maxima. The data points represent arithmetic means of the measurements at certain times of day, and the bars indicate ± SE of the ... thirds of the crowns. In 2000, the current-year to 3-year-old shoots were sampled in the upper canopy, while in the lower canopy the exact determination of...

Ngày tải lên: 08/08/2014, 01:21

... respectively. Analysis of the tree clearly established the P. pinaster deduced protein within the chloroplastidic Cu,Zn-SODs, yet indicating the natural divergence from all angiosperm species in the clade (the ... [4]. The extracellular location of this isoform in Scots pine is possibly related to the transmission of systemic signal in wounding or in pathogen res...

Ngày tải lên: 08/08/2014, 01:22

... and Wullstein, 1985), the absence of summer rain on a predictable basis would then lead to the loss of Q turbinella from the northern habitats if they are not able to maintain ... in the Cottam Oak Grove at the Uni- versity of Utah for approximately 30 years, and during that interval some of the lowest winter and spring air temper...

Ngày tải lên: 08/08/2014, 18:21

... Forest visitors’ opinions on the re- spective issues were surveyed for the first time in the CR. Nevertheless, the visit rate in the forests of the CR has been monitored annually since 1994 (Š ... also be in uenced by the information environment in CR. e opinion on forest operation importance is though incompatible with the visitors’ opinion on the coverage...

Ngày tải lên: 07/08/2014, 10:21

... rank the clones in function of the damage suffered. Concerning this last point, the clones examined in this experiment are never commercialised all together in any of the countries of origin, and ... following example: the greater the amount of tannin in the leaf, the longer the galleries of Phyllocnistis unipunctella, and the thinner the chrysalis pro-...

Ngày tải lên: 07/08/2014, 16:20

... is the most significant source of wood variation, and wood uniformity is one of the main requirements by the processing industry [30]. That underlines the importance of modelling within-ring wood ... except in EW of Df were the variability generally increased and in LW of Mp were the variability decreased. Most of the models of within-ring wood density...

Ngày tải lên: 08/08/2014, 00:21

... mounds Sycamore maple is one of the noble broadleaved species. Its representation in the existing species composition of forest stands being rather low, the study of the species and mainly of its root system ... growing roots. Nor can we corroborate the statements of the authors according to whom the sycamore maple mainly roots into a depth during the initi...

Ngày tải lên: 07/08/2014, 04:20