... 10.1051/forest:2004005 Original article Influence of individual tree and stand attributes in stem straightness in Pinus pinaster Ait. stands Miren DEL RÍO, Felipe BRAVO*, Valentín PANDO, Gemma SANZ, Rosario ... relationship between stem straightness and tree and stand attributes when the competition begins to be important. Straightness of maritime pi...
Ngày tải lên: 08/08/2014, 01:22
... through mineralization and the necessity of sufficient tree litter input to soil (U, J 2007). On stony and skeletal soils and soils cover- ing boulder substrata, a rapid replanting of empty ... task in a harsh mountainous environment, on the other hand it is an opportunity to introduce a broadleaved admixture there and thus to diversify the coniferous stands in...
Ngày tải lên: 07/08/2014, 04:20
Báo cáo lâm nghiệp:"Influence of basic density and temperature on mechanical properties perpendicular to grain of ten wood tropical species" pot
... a detailed study of mechanical behav- iour of green wood is prevailing to determine peeling and machining ability [10]. In particular, influence of temperature has to be taken into consideration ... mechanical properties of tropical woods is of prime importance for the development of wood industry in French Guyana. Peeling and machining ability is usually correlated to bas...
Ngày tải lên: 08/08/2014, 01:21
Báo cáo lâm nghiệp: "Effects of drainage treatment and stand growth on changes in runoff components from a forested watershed" pps
... ČSNI 1993. (in Czech) Drainage (1973): Principles and applications. Part II – eo- ries of drainage and watershed runoff. Wageningen, Interna- tional Institute of Land Reclamation and Improvement. ... dealing with draining waterlogged forest catchments and growing stands in relation to runoff, assessed total runoff and its extremes in the progress of time. Unlike them we...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Influence of fire and tree-fell on physiological parameters in Quercus ilex resprouts" potx
... shown in table I. Measurements LA was determined after photocopying 25-35 leaves from each stand using the Interactive Binary System (IBAS). DW was determined after drying the ... performed in situ in attached, fully expanded leaves of control plants and resprouts of burned and tree- felled stands using a portable open gas exchange system...
Ngày tải lên: 08/08/2014, 18:21
Báo cáo lâm nghiệp: "Influence of the moisture content of forest tree its response to different viability tests pollen on" pdf
... using a water bath (T1) and an incubator (T2). The 100% RH was created by saturating air in a closed container maintained at the incubator temperature T2. Germination of ... 1 grains (defined as elon- gation more than twice the original diameter of the grain) after 48 h of incubation and expressed as a percentage of the total number o...
Ngày tải lên: 09/08/2014, 04:20
Báo cáo lâm nghiệp: " Influence of temperatures and precipitation on radial increment of Orlické hory Mts. spruce stands at altitudes over 800 m a.s.l" ppt
... Synchronization of average tree- ring curves of individual stands Table 2. Synchronization of average tree- ring curves of individual stands Compared curves T-test Synchronization of curves (%) (according ... device and an impulse-meter recording the interval of table top shift- ing and in this way also the tree ring width. Measuring and synchronizing of t...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Comparison of general tree characteristics of less known oak species Quercus dalechampii Ten. and Quercus polycarpa Schur" pot
... growth and reproduction, the second one by those which attack the wood of standing living trees. Some fungi of the latter group can invade and kill living sapwood causing death to living trees ... holostea L. and Origanum vulgare L. were the most dominant species in the herb layer. In total, 48 trees of Q. polycarpa and 48 trees of Q. dalechampii were measured. Only...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: " Influence of stand density, thinning and elevated CO2 on stem wood density of spruce" pot
... describe the changes of SWD values along the stem vertical profile, (c) to investigate changes of SWD with respect to stand density and thinning. MATERIALS AND METHODS Site and stand description: ... cultivation. Stand density of two subvariants (s – sparse with ca 5,000 trees/ha and d – dense with ca 10,000 trees/ha) and thinning impact (intensity of 27%) on SWD a...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: " Influence of a planting hole application of dolomitic limestone powder and basalt grit on the growth of Carpathian birch (Betula carpatica W. et K.) and soil chemistry in the air-polluted Jizerské hory Mts." pptx
... organic matter in a pine forest in Berlin, Germany. Plant and Soil, 137: 229–236. MEIWES K.J., MINDRUP M., KHANNA P.K., 2002 . Reten- tion of Ca and Mg in the forest floor of a spruce stand after ... result of the mixing of humus horizons with mineral soil and eventual addition of mineral amendments. As expected, the liming raised the SEB and BS, which is in ac...
Ngày tải lên: 07/08/2014, 10:22