Báo cáo lâm nghiệp: "Chromosomal differentiation between Pinus heldreichii and Pinus nigra" pptx

... stability according to M (1994) and the level Floodplain forests of Litovelské Pomoraví and their management I. M Department of Biology, Faculty of Education, Palacký University in ... forests in the Litovelské Pomoraví PLA Fig. 5. Proportions of age class areas of floodplain forests in the Litovelské Pomoraví PLA % total area of floodplain f...

Ngày tải lên: 07/08/2014, 03:22

... Republic, Project No. 2B06068, and the Research Intention of ISBE AS CR, Project No. AV0Z60870520. Influence of stand density, thinning and elevated CO 2 on stem wood density of spruce I. T 1 , ... 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 (intensit...

Ngày tải lên: 07/08/2014, 03:22

... periodically. e utilization of productive growth space of the virgin forest by particular tree species and the share of the tree species in the total crown canopy in tree layers were calculated according ... mechanism, the trees of the previous generation are dying off, including fir. Dynamics of diameter structure in natural forest To exp...

Ngày tải lên: 07/08/2014, 10:22

... The area is characterized by a subtropical climate and abun- dant rainfall throughout the year. Annual mean temperature is about 21.8 ◦ C. Annual mean rainfall is 2680 mm over last 30 years (Ex- perimental ... 707 c  INRA, EDP Sciences, 2006 DOI: 10.1051/forest:2006051 Original article Nutrient dynamics in decomposing needles of Pinus luchuensis after typhoon disturban...

Ngày tải lên: 07/08/2014, 16:20

... thinning intensity depends on the number of the thinning, the intensity increasing from the first thinning to the fourth. The intensity of the first thinning is around 20% of basal area, and in the ... (% of number of trees); ◦ Percentage of low thinning (% of trees removed after system- atic thinning). – For the other thinnings ◦ Number of years since the...

Ngày tải lên: 07/08/2014, 16:21

... 747758 â INRA, EDP Sciences, 2005 DOI: 10.1051/forest:2004071 Original article Optimising the management of uneven-aged Pinus sylvestris L. and Pinus nigra Arn. mixed stands in Catalonia, north-east ... The effect of discounting rate and length of the cutting cycle on the optimal management of mixed stands of P. sylvestris and P. ni...

Ngày tải lên: 08/08/2014, 00:21

... and Pinus strobus [43]. A partial expla- nation may lie in a positive relationship between the concen- tration of P and amount of Rubisco, as observed in P. pinaster [55] and in herbaceous species ... argument against any lasting role of A max in the growth response. Concentrations of N, P, and K were maintained within a relatively small range, and ther...

Ngày tải lên: 08/08/2014, 00:21

... cultivated poplars and their wild relatives: evidence and consequences for native poplar populations An VANDEN BROECK a *, Marc VILLAR b , Erik VAN BOCKSTAELE c , Jos VAN SLYCKEN a a Institute for Forestry ... natural genetic barriers and its frequency depends on the local population size and the abundance of the cultivated poplars. In summary, the risk of...

Ngày tải lên: 08/08/2014, 00:22

... (pairs 1, 4, 7 and 8), 2 with only centromeric bands (pairs 11 and 12) and 3 pairs (2, 5 and 10) having both intercalary and centro- meric bands (Figs. 1 (2a) and 2B). In karyotype of P. heldreichii ... with centromeric and intercalar bands on short arm (pairs 2, 7, and 8), chromosome pairs with centromeric and intercalar bands on long arm (pairs 5, 9 and 12) and chro...

Ngày tải lên: 08/08/2014, 00:22

... 10.1051/forest:2003002 Original article Optimising the management of Scots pine (Pinus sylvestris L.) stands in Spain based on individual-tree models Marc Palahí a * and Timo Pukkala b a European Forest Institute, ... simulation-optimisation system, SPINE, for the management of Pinus sylvestris L. stands in Spain. The simulation sub-system is b...

Ngày tải lên: 08/08/2014, 01:21

... with Average Ring Density, Minimum Density, Earlywood Density and Latewood Percentage. tree breeding / genetic correlations / wood quality / wood density components / Pinus pinaster Résumé – Corrélations ... For. Sci. 60 (2003) 285294 â INRA, EDP Sciences, 2003 DOI: 10.1051/forest:2003020 Original article Genetic correlations between wood density components in P...

Ngày tải lên: 08/08/2014, 01:21

... sub-tropical, with a mean annual rainfall and temperature of 1144 mm and 22 °C respectively. The trial was located at an elevation of 45 m on an east facing slope. Soil parent material is of aeolian ... important indicator of pulpwood quality. 3.7. The use of Canonical Variate Analysis to compare the properties between groups of variates Canonical Variate Analysis...

Ngày tải lên: 08/08/2014, 01:21

... 10.1051/forest:2004025 Original article Effects of microsite on growth of Pinus cembra in the subalpine zone of the Austrian Alps Mai-He LI a,b *, Jian YANG c a Institute for Forest and Mountain Risk Engineering, ... cor- responding to the decrease in length of the growing season [19]. Paulsen et al. [31] found that annual radial increments of Pinus...

Ngày tải lên: 08/08/2014, 01:21

... (Pinus uncinata var. rotundata) at the interface with the Norway spruce (Picea abies) belt on the edge of a raised bog in the Jura Mountains, Switzerland Franỗois FRELẫCHOUX a, b,c *, Alexandre ... Gobat J M., Stand structure, invasion and growth dynamics of bog pine (Pinus uncinata var. rotundata) in relation to peat cu...

Ngày tải lên: 08/08/2014, 01:21

... alt="" Ionic interactions between precipitation and leaf cuticles T. Scherbatskoy University of Vermont, Botany Department, Burlington, VT 05405, U.S.A. Introduction The leaf cuticle ... interactions between leaf surfaces and precipitation, particularly the role of the leaf cuticle in mediating ion transport into and out of the leaves. Mater...

Ngày tải lên: 09/08/2014, 04:20