搜索结果: 1-15 共查到“林学 range”相关记录15条 . 查询时间(0.093 秒)
Comparison of partial least squares-discriminant analysis, support vector machines and deep neural networks for spectrometric classification of seed vigour in a broad range of tree species
least squares-discriminant analysis spectrometric classification seed tree species
2023/6/5
Seed vigour significantly influences the seed production and plant regeneration performance. The capability of NIR spectroscopy to identify seed vigour across multiple tree species rapidly and cost-ef...
Orthotropic Tension Behavior of Two Typical Chinese Plantation Woods at Wide Relative Humidity Range
orthotropic tensile modulus tensile strength moisture content relative humidity
2024/3/8
Orthotropic tension behaviors of poplar and Chinese fir were investigated at a wide relative humidity (RH) range. Background and Objectives: Poplar and Chinese fir are typical plantation tree species ...
Analysis of operational approach during forest transformation in Klokočná Range, Central Bohemia
stand transformation harvest diameter distribution
2015/5/18
In this study immediate results concerning the effectiveness of the applied silvicultural measures in the
course of forest transformation were analysed.
Variation of the tree form factor and taper in European larch of Polish provenances tested under conditions of the Beskid Sądecki mountain range (southern Poland)
genotype planting experiment stem profile
2015/3/5
The genetic variation in 20 provenances of European larch, growing under site conditions of the Beskid Sądecki mountain range (experimental area in Krynica), was investigated during a long-term s...
Spatial distribution of losses in growth of trees caused by the feeding of pine shoot beetles Tomicus piniperda and T. minor (Col., Scolytidae) in Scots pine stands growing within range of the influence of a timber yard in southern Poland
Pinus sylvestris (L.) Tomicus piniperda (L.)
2015/3/3
This study deals with the assessment of increment losses in Scots pine trees caused by the maturation
feeding of pine shoot beetles Tomicus piniperda (L.) and T. minor (Hart.) (Col., Scolytidae) in e...
Structure, growth and increment of the stands in the course of stand transformation in the Klokočná Forest Range
uneven-aged forest stands forest stand transformation
2015/3/3
This paper deals with transformation of pure even-aged forest stands to uneven-aged irregular stands on
an example of the Klokočná Forest Range. The fully operational management system accordin...
Damage by deer barking and browsing and subsequent rots in Norway spruce stands of Forest Range MoP.
bark stripping browsing rot Stereum sanguinolentum red deer financial loss
2015/2/2
The paper deals with the determination of the rate of damage by deer barking and browsing, the subsequent rot caused by Stereum sanguinolentum and the rate of its progress, elucidates causes of damage...
Long-range Estimation of Standing Timber Stock in Western Boreal Forest of Canada Using Airborne Laser Altimetry
airborne laser altimetry boreal forest forest biomass forest volume vegetation profile
2009/8/27
A continuous vegetation profile covering a 600 km transect set up N-S across the boreal forest region of western Canada was obtained by airborne laser altimetry, along with ground-truth measurements o...
Long-range Estimation of Leaf Area Index Using Airborne Laser Altimetry in Siberian Boreal Forest
airborne laser altimetry leaf area index long-range estimation permafrost Siberian boreal forest
2009/8/27
Being the most extensively forested region of the world, the carbon budget of the Siberian boreal forest is one of the important subjects of global concern. This study was conducted to quantify leaf a...
RESPONSE OF RANGE GRASSES TO SALINITY LEVELS AT GERMINATION AND SEEDLING STAGE
Panicum antidotale Dichanthium annulatum Cenchrus cilliaris
2010/9/26
In a pot study conducted in the Department of Forestry, Range Management and Livestock, University of Agriculture, Faisalabad, Pakistan during 2005,three range grasses [blue panic grass (Panicum antid...
Natural regeneration of lodgepole pine following partial harvesting on northern caribou winter range in west-central British Columbia
British Columbia caribou winter range forest management group selection lodgepole pine
2009/2/11
This study compares pine natural regeneration density and height growth in small harvested openings (0.01–0.07 ha) within two biogeoclimatic subzones (Sub-Boreal Pine–Spruce [SBPS] xc and Montane Spru...
Effects of post-harvest treatments on high-elevation forests in the North Cascade Range, Washington
Abies amabilis Cascade Range high-elevation forest overstorey Tsuga heterophylla
2009/2/6
We studied the effects of post-harvest treatments on regeneration and forest composition 13–27 years following harvest in high-elevation forests of the North Cascade Range, Washington. Eighteen sites ...
Forest bird response to partial cutting in lodgepole pine forests on caribou winter range in west-central British Columbia
birds group selection silvicultural system lodgepole pine partial cutting shelterwood
2009/2/6
Breeding birds were surveyed 1 year pre-harvest (1995) and 4 years post-harvest (1996–2001) to measure the response to partial cutting in old lodgepole pine (Pinus contorta Dougl.) forests on the Chil...
Snow depth as a function of canopy cover and other site attributes in a forested ungulate winter range in southeast British Columbia
canopy cover southeast British Columbia snow depth ungulate winter range
2009/1/9
Snow depth is considered a major influence on deer (Odocoileus spp.) winter distribution and abundance in northern parts of their range. Overstorey canopy cover is often considered a principal variabl...
Range of natural variability：Applying the concept to forest management in central British Columbia
apparent range of variability ecosystem management fire regime forest management historic
2009/1/8
The range of natural variability (RNV) is a concept relevant to maintaining biodiversity and resilience in managed forests. It is, however, a challenging concept both to describe and apply. Here, we r...