Báo cáo lâm nghiệp: "Yellow-cedar and western redcedar ecophysiological response to fall, winter and early spring temperature conditions" pdf

... the Pacific Northwest during the fall, winter and early spring period. Both western redcedar and yellow-cedar photosynthetic patterns during fall, winter and early spring were directly affected ... rapidly in western redcedar [13, 45] and yellow-cedar [5, 20, 21] exposed to lower winter air temperatures. As air temperature increases in late winter and...

Ngày tải lên: 08/08/2014, 00:22

... quickly due to the scarcity of winter rainfall (i.e. 51 mm between November and February of 2005 in com- parison to 358 and 254 mm of 2003 and 2004, respectively). Furthermore, low spring rainfall ... first and second meter depth at Cerro Lobato (a and b, respectively), and at Baldío (c and d, respectively). Bars indicate monthly precipitation. Autumn rainfalls refilled qu...

Ngày tải lên: 07/08/2014, 16:21

... Anthribidae) and notes to its life history J. H 1,2 , M. T 3 1 Forestry and Game Management Research Institute, Jíloviště-Strnady, Frýdek-Místek, Czech Republic 2 Faculty of Forestry and Wood ... 11–15 Adults of A. nebulosus overwinter in bark. is generation leaves this place in spring and flies to new sites. erefore beetles are collected mainly in May and June...

Ngày tải lên: 07/08/2014, 03:22

... along the roads, moist sites at the foot of upland, grassy bogs, felled and burnt areas, abandoned meadows and plough-lands. Area: North, Middle and Southeast Europe, boun- dary of West Asia: ... stability and on the average amounts to 10.5. A great quantity of glands on the abaxial leaf side is typical for the hybrids compared to both species. In A. incana, on the average, 1...

Ngày tải lên: 07/08/2014, 03:22

... Differentiated response and the progress of dieback are particularly dependent on the tree species and its sensitivity to arboricides. Blue spruce, compared to Norway spruce, appears to be more ... interesting. is type of dieback and species spectrum are close to qualitative changes in the phloem and the structure of fauna on standing spruce breaks in stands of the 2 n...

Ngày tải lên: 07/08/2014, 03:22

... B A. (2006): Response of Picea mariana to elevated CO 2 concentration during growth, cold harden- ing and dehardening: phenology, cold tolerance, photosyn- thesis and growth. Tree Physiology, ... needle/leaf clearly showing through the bud scales, and 4 – leaf per needle elon- gation). Shoot elongation growth was observed on exposed and shaded apical (ExA and ShA) and...

Ngày tải lên: 07/08/2014, 03:22

... Ecology and Management, 145: 191–202. B K., P. B (2006): An economic and landscape evaluation of the green-up rules for California, Oregon, and Washington (USA). Forest Policy and ... con- tiguous stands that are divided into several strips.  e objective is to maximize the total cut volume from all strips over the regeneration period. Con- straints include harvest...

Ngày tải lên: 07/08/2014, 10:21

... 2006): Dm = Dg – Exp(Xδ) (1) where: X is the vector of stand variables (e.g. dominant height, stand age and stand density) and δ is the vector of parameters to be estimated. e variable rate method ... estimates of stand variables, T Y – estimates of stand variables at tree-level, S Y – estimates of stand variables at stand-level, w – weight factor, 2 T σ – variance of stand var...

Ngày tải lên: 07/08/2014, 10:22

... Variations due to clones and trial fields The clones generate variations of the damage in the pro- portion of 1 to 8 for the L1 and 1 to 4 for the L2. Variability between the DN hybrids is clearly much ... However, the se- lector must remember that the resistance of poplars to pests is very variable and that, in consequence, resistance to pests specific to the planting site wi...

Ngày tải lên: 07/08/2014, 16:20

... on bulk density and water infiltration have led to con- tradictory and inconclusive results due to variability of soils different researchers worked on [29]. Soil moisture and soil temperature conditions ... in understory are due to a combination of factors related to sil- viculture (some trees were cut) and natural events (windthrow). Soil conditions were homogeneous in each...

Ngày tải lên: 07/08/2014, 16:20