Báo cáo lâm nghiệp: " Compatible stem taper and stem volume functions for oak (Quercus robur L and Q petraea (Matt) Liebl) in Denmark" docx

... past Multifunctional forestry practices as a land use strategy to meet increasing private and public demands in modern societies F. S Zurich, Switzerland ABSTRACT: e present distribution ... it has integrated increasing societal de- mands into current management practices. To assess the present and future options in management of forests,...

Ngày tải lên: 07/08/2014, 03:22

... variables, the stratification of the crown and the deletion of segments. In the present study, the effects of the choice of the auxiliary variable and of the created crown structure (segments and nodes, ... dele- tion of the stem segments. After this closer look at the old pine, the effect of stratification and deletion of the stem seg...

Ngày tải lên: 07/08/2014, 03:22

... Comparison of general tree characteristics of less known oak species Quercus dalechampii Ten. and Quercus polycarpa Schur R. M Faculty of Forestry and Wood Technology, Mendel University of Agriculture ... Average total height of measured trees of both studied species Fig. 2. Average height of the live crown base of both studied species Q....

Ngày tải lên: 07/08/2014, 03:22

... ad- vantages of such. MATERIAL AND METHODS To obtain D. schmidtii larvae it is recommended to simply beat the bottom branches of the food- plant up to 3 m above ground level. The larvae of this ... possibilities. (C) Degree of isolation of the population present on the site in relation to the natural range of the species. (D) Global assessment of...

Ngày tải lên: 07/08/2014, 10:21

... diversity across landscapes and regions: a hierarchical analysis of alpha, beta, and gamma diversity. American Naturalist, 162: 73 4–7 43. FEENY P., 1970. Seasonal changes in oak leaf tannins and ... rubra 0.1 1 10 100 1000 Psychidae Tineidae Bucculatricidae Gracillaridae Ypsolophidae Oecophoridae Coleophoridae Gelechiidae Tortricidae Pyralidae Limacodidae Lycaenidae Drepanidae Geome...

Ngày tải lên: 07/08/2014, 10:22

... comparing Douglas-fir growth responses following complete control of woody vegetation (without control of herbaceous vegetation) to complete control of herbaceous vegetation (without control of woody ... a 2 ì 2 factorial with herbaceous control as one factor and woody control as the other factor using the data base that included woody- only control, h...

Ngày tải lên: 08/08/2014, 00:22

... Crown reconstruction algorithms Two algorithms were developed to reconstruct crown radii for each tree from tree position, stem diameter, total tree height, crown base height and equivalent crown ... the following to calculate stem diameter: – The max stem diameter of the clump, for prediction of total height and crown length. – The equivalent s...

Ngày tải lên: 08/08/2014, 00:22

... on the diameter growth of Norway spruce and aspen in mixed stands: a case study from the southern Russian taiga Fyodor TATARINOV a, b,c *, Yury BOCHKAREV d , Alexander OLTCHEV a, e , Nadezhda ... Stand seasonal growth pattern in 2000 Seasonal increment of basal area in spruce represented over 80% of the entire stand basal area increment (a...

Ngày tải lên: 08/08/2014, 00:22

... A comparative study using floristic and abiotic indices in sessile oak (Quercus petraea Liebl.) stands in northern France Laurent BERGÈS a *, Jean-Claude GÉGOUT b , Alain FRANC c a Cemagref, ... combined the CA Axes and soil water capacity and was slightly better than models M4 and M1. Model M7 combined abiotic indices (SWC 0-150 and Mg/K)...

Ngày tải lên: 08/08/2014, 00:22

... backpack sprayers would be $743 ha –1 . While no data are available for aerial applications in the Nelson Forest Region for year 2000, the average cost of aerial herbicide application for the province of ... stands and achievement of free-growing requirements. A study was established in 1991 to examine the effectiveness of vegetation control treatments for release o...

Ngày tải lên: 08/08/2014, 01:21

... have reported the X-ray wood density measurement and the wood density profiles cal- culated by the mean of the cell wall proportion obtained by image analysis of the sections. The cell wall proportion ... et al. and (ii) the cell wall proportion on its area or on a section withdrawn from it. The apparent density of the cell wall is then...

Ngày tải lên: 08/08/2014, 01:22

... (Champagnat et al, 1986). Les résultats obtenus au cours de l’étude histologique du bourgeon du chêne rouge sont en accord avec ceux obtenus chez le chêne pédonculé par Barnola et ... (Collin et al, 1994). Pour progresser dans la compréhen- sion du déterminisme du rythme de crois- sance chez le chêne rouge d’Amérique, dif- férents tra...

Ngày tải lên: 08/08/2014, 18:21

... Defining a1 -a10 as

Ngày tải lên: 08/08/2014, 18:21

... Micropropagation of hybrid walnut trees (Juglans nigra x Juglans regia) through culture and multiplication of embryos D. Cornu C. Jay-Allemand bres Forestiers, INRA, ... France Introduction Walnuts are very valuable trees for nuts and wood production, but we see a reduc- tion in the number of logs available for veneer. Although Pers...

Ngày tải lên: 09/08/2014, 04:20

... chênes, à Quercus robur, 1 sil est ô typique ằ de Quercus petraea et sil est de type inter- médiaire (ou encore 0 pour Quercus robur, 4 pour Quercus petraea et de 1 à ... and Quercus petraea. (Matt.) Liebl. D. Phil. Thesis., University of York. R USHTON B.S., 1977. Artificial hybridization between Quercus robur L. and Quer...

Ngày tải lên: 09/08/2014, 06:21