Báo cáo lâm nghiệp:"Estimation of crown radii and crown projection area from stem size and tree position" pps

... OF FOREST SCIENCE, 53, 2007 (Special Issue): 3–10 Composition of psocid taxocenoses (Insecta: Psocoptera) in Fageti -Piceeta s. lat. and Piceeta s. lat. forests in the Western Carpathian Mts. O. ... Fageti -Piceeta s. lat. and the 8 th – Piceeta s. lat. ese AVZ occur in the study area in the Moravskoslezské Beskydy Mts. in...

Ngày tải lên: 07/08/2014, 03:22

... within forest stands. e comparison of bulk deposition fluxes of Ca, Mg, K, S-SO 4 , N-NO 3 and N-NH 4 in mountain spruce stands of different stand density and bulk deposition fluxes on the open ... N-NO 3 and N-NH 4 in the mountain spruce stands of different stand density and bulk deposition fluxes on the open area were measured at...

Ngày tải lên: 07/08/2014, 04:20

... 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

... spp. and Brachipodium pinnatum. The effects of light level and competition on growth and on crown and shoot morphological parameters were assessed for 76 saplings (48 Norway spruce and 28 silver ... traits [13], and possibly in allocation pat- terns, but not to morphological ones. 4. CONCLUSIONS Results of the present study confirm the importance of...

Ngày tải lên: 08/08/2014, 00:21

... cost associated to leaf area renewal in saplings of two co-occurring temperate tree species (Acer platanoides L. and Fraxinus excelsior L.) along a light gradient Sandrine BARTHOD a , Daniel ... leaf mass per unit area, LMA) to the cost associated with leaf area renewal (construction cost of the leafy shoot per unit leaf...

Ngày tải lên: 08/08/2014, 00:22

... 207– 231. [4] Bréda N., Granier A. , Intra- and inter-annual variations of transpi- ration, leaf area index and radial growth of a sessile oak stand (Quercus petraea), Ann. For. Sci. 53 (1996) 521–536. [5] ... robur (L.) stand from 1999 to 2001. I. Trees and forest floor daily transpiration Caroline VINCKE a *, Nathalie BREDA b , André GRANIER b , F...

Ngày tải lên: 08/08/2014, 00:22

... several ways according to leaf area development. For periods of leaf area expansion and leaf fall, daily transpiration was calculated with an equation based on daily PET and on a relative LAI (LAI i /LAImax), ... from 1999 to 2001. II. Daily actual evapotranspiration and soil water reserve Caroline VINCKE a *, André GRANIER b , Nathalie BREDA b , Freddy D...

Ngày tải lên: 08/08/2014, 00:22

... pine. The uncertainty in the biomass estimates of birch was high, since the number of birch stands was low in both the material used for formulation of the BEFs, and in the Swedish data on which the ... Svealand and Götaland regions. In Svealand, the use of BEFs for Norway spruce in young stands resulted in lower, and in mature stands, higher bio...

Ngày tải lên: 08/08/2014, 00:22

... vegetation. The total stock, in tC, for the whole of Fougères forest was therefore the sum of the stocks in all the plots. Then the range of the total stock was calculated and the corresponding map ... the vegetation. From the statistical analyses and existing maps these point data were extrapolated to the whole forest using two changes of scal...

Ngày tải lên: 08/08/2014, 00:22

... 10.1051/forest:2003011 Original article Comparison of soil water-contents as measured with a neutron probe and time domain reflectometry in a Mediterranean forest (“Sierra de Gata”, Central Western Spain) Mar a Amparo ... useful information about the actual evapotranspiration, drainage, and leaching [14]. Over the past decade, interest in water fluxes in...

Ngày tải lên: 08/08/2014, 01:21

... article Predicting of oak wood properties using X-ray inspection: representation, homogenisation and localisation. Part II: Computation of macroscopic properties and microscopic stress fields Patrick Perré and ... homogenisation: Part II of this paper is devoted to the calculation of the macroscopic properties and the determination of t...

Ngày tải lên: 08/08/2014, 01:21

... 10.1051/forest:2003031 Original article Estimation of crown radii and crown projection area from stem size and tree position Rüdiger GROTE* Chair for Forest Yield Science, Department of Ecology and Landscape Management, ... determination of radius length and potential crown cover (pr1 and pr2: maximum radii, alin1 and blin1: linear radii estimation, al...

Ngày tải lên: 08/08/2014, 01:21

... nitrification in non-nitrifying soil, although mineralisation increased. Finally, Barg and Edmonds [4] found no change in mineralisation and nitrification rates after partial or total clear- cut, as ... containing an anion resin bag and six cylinders containing a cation resin bag were set up. Finally, at the beginning of October 1996, the quantity of resin in each cy...

Ngày tải lên: 08/08/2014, 01:21

... 5) with a core of clones between 37 and 44 degrees Estimation of genetic parameters in the European black poplar (Populus nigra L.). Consequence on the breeding strategy Ch. ... discussion, need to be based on the genetic and economic properties of the species. The present study aims to estimate the genetic parameters i...

Ngày tải lên: 09/08/2014, 02:21

... ultrapure water as eluant. 2.4.3. Amino-acid analysis Extraction was carried out at 4 °C. 40 μL of an internal standard (α-butyric acid) were added to samples ... of primary leaves), of the tap root (TR) and of the three longest lateral roots (LR; as an assessment of the length of the lat- eral roots) of each...

Ngày tải lên: 09/08/2014, 04:20