Báo cáo lâm nghiệp: "Evaluation of squared timber and log products in the Hyrcanian Forests of Iran" doc

... in the framework of long-term programmes using the clonal propagation (J et al. 1994); their re- Evaluation of the growth and health status of selected clone mixtures in comparison with ... exposed locations where their observation continues and their growth and health status are compared with the ordinary planting stock of genera...

Ngày tải lên: 07/08/2014, 03:22

... primary productivity in ter- restrial ecosystems (J et al. 1999), N miner- Moisture effect on carbon and nitrogen mineralization in topsoil of Changbai Mountain, Northeast China G. Q 1,2 , Q. ... is maintained at 20°C. For the given vegetation type of Changbai Mountain, soil C and N mineralization rate, potential mineralizable C (C 0 ) and potential ra...

Ngày tải lên: 07/08/2014, 10:21

... shedding light on the pro- cesses and trends of squared timber and log pro- duction and the relations between them in the Hyr- canian Forests of Iran during the last 20 years. MATERIALS AND METHODS Areas ... bordering the northern part of the Alborz Mountains and ex- tend from Astara in the west of Gilan Province to Giledarreh in the east of...

Ngày tải lên: 07/08/2014, 10:21

... linear constructions include direct occupation of biotopes, recolonization of the landscape in the construction of roads, environ- mental contamination, and widely various types of interference ... quantification of the landscape macrostructure’s evolution as affected by the construction and subsequent operation of the linear structure in the form of a...

Ngày tải lên: 07/08/2014, 10:21

... of young spruces with known growth rate in a nursery and after outplanting are carried out in the framework of the grant project “Conservation of the stability and biodiversity of Norway spruce ... practice). Height and diameter growth and health status of outplantings are evaluated regularly on this research plot. A more detailed evaluation of phen...

Ngày tải lên: 07/08/2014, 10:21

... prov- enances of sessile oak: 11 Křivoklát (6.36 m) and 31 Bučovice (6.62 m) and of pedunculate oak: 12 Křivoklát (6.72 m) and 45 Strážnice (6.76 m).  e type of branching of sessile oak is character- ized ... stem shape evaluation document that fi ve provenances of sessile oak and four prov- enances of pedunculate oak had the highest propor- tion of...

Ngày tải lên: 07/08/2014, 10:21

... 566 J. FOR. SCI., 54, 2008 (12): 566–571 JOURNAL OF FOREST SCIENCE, 54, 2008 (12): 566–571 Evaluation of three methods for estimating the Weibull distribution parameters of Chinese pine (Pinus ... on the basis of the mean square error (MSE) and sample size. For these sample plots, the moment method was superior for estimating the parameters o...

Ngày tải lên: 07/08/2014, 10:22

... part of a larger project that examined patterns of below- and above-ground biomass in Eu- calyptus populnea woodland ecosystems along a rainfall gradient in northeast Australia [25]. Here, data ... 247 c  INRA, EDP Sciences, 2007 DOI: 10.1051/forest:2007002 Original article Evaluation of a semi-empirical model for predicting fine root biomass in composit...

Ngày tải lên: 07/08/2014, 16:20

... and SG-ratio tested depending on thinning intensities for radiata pine and maritime pine. Pinus radiata Pinus pinaster Intensity of First thinning Second thinning First thinning Second thinning thinning ... study was to calculate the accumu- lation and the export of nutrients over time in Pinus pinaster (maritime pine) and Pinus radiata (radiata pine) stands...

Ngày tải lên: 07/08/2014, 16:21

... CONCLUSIONS In this examination of competition indices for predicting diameter growth in mixed- species forests, we found that the flexible, distance-dependent crowding index was superior to other indices, but ... based indices [6, 7, 27] is also costly to ob- tain in a forest inventory. The similarity amongst the fit of Competition indices in boreal mixed fo...

Ngày tải lên: 07/08/2014, 16:21

... 10.1051/forest:2007040 Original article End-use related physical and mechanical properties of selected fast-growing poplar hybrids (Populus trichocarpa ì P. deltoides) Lieven De Boever,DriesVansteenkiste,JorisVan ... the variabil- ity in selected physical and mechanical properties of new inter-American poplar clones (P. trichocarpa ì deltoides). As...

Ngày tải lên: 07/08/2014, 16:21

... is to examine the expression of Embryonic Intermediate Filaments, Nestin and Vimentin, Expression in the Spinal Cords of Rats with Experimental Autoimmune Encephalomyelitis Tae-kyun Shin*, Yong-duk ... in part Embryonic Intermediate Filaments, Nestin and Vimentin, Expression in the Spinal Cords of Rats with Experimental Autoi...

Ngày tải lên: 07/08/2014, 17:22

... expected change in distribution of within-ring density for one sd increase in ring width is presented in Figure 3. 3.4. Differences among clones in within-ring density Fluctuations in growth rate and within-ring ... relative contribution of clone differences to the overall variation in shape of within-ring frequency distributions of wood density....

Ngày tải lên: 08/08/2014, 00:21

... 195208 â INRA, EDP Sciences, 2003 DOI: 10.1051/forest:2003012 Original article Needle longevity, shoot growth and branching frequency in relation to site fertility and within-canopy light conditions ... average needle age, shoot length growth, and branching frequency in response to seasonal average integrated quantum flux density (Q int ) were in...

Ngày tải lên: 08/08/2014, 01:21

... retained and the kind of mixed stand [33]. Finally, other recent studies concerning silvicultural aspects of Scots pine (Pinus sylvestris L.) without including GTR can be founded in Mörling [22] ... different silvicultural alternatives. The yield model was elaborated for Scots pine stands in northern Spain using 75 temporary plots from the Sec- ond National Forest I...

Ngày tải lên: 08/08/2014, 01:22