Báo cáo lâm nghiệp: "Characteristics of coarse woody debris in successional stages of natural beech (Fagus orientalis) forests of Northern Iran" ppsx

... that the fine root ratio is stable at least in the first growing period of new plantation and the best growing plants have about the same fine root ratio as the poorly growing ones. Even the regression ... explaining 92% of the relationship. An adequate proportion of fine roots (thinner than 2 mm) in the root system is another important parameter of p...

Ngày tải lên: 07/08/2014, 03:22

... Technology. Characteristics of 3 rd (Querci-fageta s. lat.) and 4 th (Fageta (abietis) s. lat.) vegetation tiers of north-eastern Moravia and Silesia (Czech Republic) O. H 1,2 , J. H 2 , S. 1 Faculty of ... geobiocenoses of Querci-fageta s. lat.) and 4 th (Fageta (abietis) s. lat.) vegetation tiers in north-east...

Ngày tải lên: 07/08/2014, 04:20

... cycling (R, P 1999; C et al. 2001; C, N 2002; Characteristics of coarse woody debris in successional stages of natural beech (Fagus orientalis) forests of Northern ... origins of deadwood mate- rial in Aspen-dominated boreal forests. Applied Ecology, 7: 691–701. M M M.R. (1976): Some qualitative character of...

Ngày tải lên: 07/08/2014, 10:21

... 801 c  INRA, EDP Sciences, 2006 DOI: 10.1051/forest:2006063 Original article Fungi associated with Tomicus piniperda in Poland and assessment of their virulence using Scots pine seedlings Robert ... col- onizer of pine tree stems. Tomicus piniperda, together with its cogener T. minor (Hrtg.), ranks among the main insect pests of Scots pine in P...

Ngày tải lên: 07/08/2014, 16:20

... TSR in the oak, mixed and beech stands. The annual heterotrophic respiration of the forest floor ac- counted respectively for 68, 74 and 51% of the annual FFR in the oak, mixed and beech stands ... 10.1051/forest:2006098 Original article Soil carbon dioxide efflux in pure and mixed stands of oak and beech Mathieu J * , Frộdộric A , Franỗois J,Nicol...

Ngày tải lên: 07/08/2014, 16:20

... high quality but low density sites (such as TAR). The lowest tree density and low Aleppo pine reproduction after large fires 651 Figure 2. Cone production (X axis: site; Y axis: number of cones per ... tree density and three for site quality distributed along Eastern Spain. 2.3. Measurement of reproductive characteristics Fertilized cones were counted and classified...

Ngày tải lên: 07/08/2014, 16:21

... 10.1051/forest:2005018 Original article Predicting balsam fir growth reduction caused by spruce budworm using large-scale historical records of defoliation David POTHIER a *, Daniel MAILLY b , ... – To predict the reduction in growth of balsam fir (Abies balsamea (L.) Mill.) subjected to spruce budworm (Choristoneura fumiferana (Clem.)) epidemics, tree-...

Ngày tải lên: 08/08/2014, 00:21

... article Daylength, temperature and fertilization effects on desiccation resistance, cold hardiness and root growth potential of Picea mariana seedlings Stephen J. COLOMBO a *, Chris GLERUM a † and D. ... the effect of temperature, fertilizer application, and daylength on the development of needle primordia in buds, desiccation resistance, col...

Ngày tải lên: 08/08/2014, 01:21

... growth of jack pine in pure jack pine stands and stands mixed with aspen or birch. They found no difference in the effect of intraspecific compe- tition from jack pine and interspecific competition ... skewness in basal area distribution of jack pine between pure jack pine stands and stands composed of a mixture of jack pine and ei...

Ngày tải lên: 08/08/2014, 01:21

... slightly damaged plots with a remaining basal area ≥ 80% of the original (mean logging intensity = 6 trees ha –1 ). Plots belonging to G2, had a remaining basal area varying between 70 and 79% of the ... large areas. Moreover, matrix models can also pre- dict in a robust way and as reliably as other approaches, stand structure (density, basal area and diameter distribution)...

Ngày tải lên: 08/08/2014, 01:21

... individual-tree diameter growth models for uneven-aged mixtures of Pinus sylvestris L. and Pinus nigra Arn. in Catalonia, north-east Spain Antoni TRASOBARES a *, Timo PUKKALA b a Centre Tecnològic Forestal ... study, growth models of individual tree diameter for uneven-aged mixtures of P. sylvestris and P. nigra in Catalonia were...

Ngày tải lên: 08/08/2014, 01:21

... efficient cold hardening in a breeding population of Salix using near infrared reflectance spectroscopy Mattias LENNARTSSON, Erling ƯGREN* Umể Plant Science Centre, Department of Forest Genetics and ... hardening clone and an early-and-rapidly hardening one; and to test the value of the spectral technique for diagnosing cold hardiness in a breeding...

Ngày tải lên: 08/08/2014, 01:21

... in seedlings of Quercus robur L. and Q. petraea (Matt.) Liebl.: modulation by irradiance and growth flush Stéphane PONTON, Jean-Luc DUPOUEY*, Erwin DREYER Unité Mixte de Recherches INRA-UHP-Nancy, ... well-known increase of leaf size and decrease of thickness [2] under shade, Blue and Jensen [5] indicated that sun leaves of oak (Q. velutina, Q. r...

Ngày tải lên: 08/08/2014, 01:22

... but Short note Insect damage to cones and other mortality factors limiting natural regeneration potential of Swiss stone pine (Pinus cembra L) in the northern French Alps L ... seed cones of P cembra, and then to measure the respective impact of insects and other mortality factors on the potential of natural...

Ngày tải lên: 08/08/2014, 18:21

... per branch was determined. Original article Soil and tree water relations in mature oak stands of northern Germany differing in the degree of decline FM Thomas G Hartmann Niedersächsische ... reduced in the stands of the Hakel Forest. In these stands, the tensiometers were placed within an area of about 20 m * 10 m. Since...

Ngày tải lên: 08/08/2014, 18:21