搜索结果: 1-15 共查到“林学 variability”相关记录20条 . 查询时间(0.153 秒)
Monitoring intra-annual and interannual variability in spatial distribution of plastic-mulched citrus in cloudy and rainy areas using multisource remote sensing data（图）
Monitoring intra-annual interannual variability spatial distribution plastic-mulched citrus
2024/4/1
The technology of canopy plastic mulching has been widely used in citrus orchards for protecting fruit trees from cold damage. Understanding the spatio-temporal dynamics of plastic-mulched citrus (PMC...
Foliar water uptake in arid ecosystems: seasonal variability and ecophysiological consequences
Rooting depth Cell wall elasticity Leaf water potential Transpiration Rain pulse Dew formation
2024/1/12
Foliar water uptake (FWU) has been reported for different species across several ecosystems types. However, little attention has been given to arid ecosystems, where FWU during dew formation or small ...
Variability in growth and cadmium accumulation capacity among willow hybrids and their parents: implications for yield-based selection of Cd-efficient cultivars（图）
柳树 杂交子代 镉 积累能力
2023/6/2
上个世纪90年代，北美灌木柳育种计划在纽约州启动，经过30多年的杂交、选育以及在美国中、北部的区域试验，选育了一大批高产、高抗的灌木柳栽培品种，目前很多品种在美国已商品化生产。在北美纽约州、宾夕法尼亚州等地，灌木柳被广泛用于工业污染地、垃圾填埋场的植物修复、公路防风雪篱以及生物质能源生产。尽管国际上在柳树重金属污染修复方面做了大量研究，筛选出很多对重金属具有高积累、耐性以及转移的品种，但是重金属积...
Variability in leaf and crown morphology correlated with light availability in five natural populations of Quercus castaneifolia C.A. Mey
plasticity Hyrcanian forest controlled conditions leaf mass leaf area leaf area ratio
2018/3/6
In this study, we investigate seedlings of Quercus castaneifolia C.A. Mey, from five different provenances for the research
on leaf and crown morphological variations in relation to a light gradient ...
Morphological variability between diploid and tetraploid taxa of the genus Betula L. in the Czech Republic
silver birch downy birch ploidy flow cytometry classification function
2018/3/6
The aim of this work was to suggest a reliable method for distinguishing between diploid and tetraploid taxa of the
genus Betula Linnaeus, based on leaf measurements. In total, 97 individuals from 6 ...
Detection of the effects of management and physical factors on forest soil carbon stock variability in semiarid conditions using parametric and nonparametric methods
soil organic carbon CART modelling, neural networks
2015/11/26
Forest soils in western parts of Iran are being degraded by inappropriate management. The soil organic carbon (SOC) stock was dominantly affected by this type of degradation. On the other hand, SOC is...
Assessment of genetic variability in autochthonous elm populations using ISSR markers
Ulmus minor U. glabra U. laevis genetic diversity and differentiation
2015/5/5
Genetic diversity between 110 individuals from 6 elm populations (Ulmus minor, U. glabra and U. laevis)
was determined using ISSR markers. Altogether 73 ISSR markers were evaluated with the average ...
Growth of Norway spruce (Picea abies [L.] Karsten) from artificial and natural regeneration in the Krkonoše Mts. and air temperature variability
climate regression models 8th forest altitudal zone reforestation
2015/4/24
Our research was concerned with a description of the influence of variability in average temperatures on the height growth of selected young populations of spruce in the Krkonoše Mts. Several pop...
Geographical variability of spruce bark beetle development under climate change in the Czech Republic
bark beetle altitudinal shift climate change scenario Ips typographus generations temperature increase
2015/3/27
Climate change is expected to influence the distribution and population dynamics of many insect pests, with potential severe impacts on forests. Spruce bark beetle Ips typographus (L.) (Col.: Curculio...
Variability of Norway spruce (Picea abies [L.] Karst.) cone entomofauna in the Tatra National Park in association with the development of cones
cones entomofauna Norway spruce sequence Tatra Mts
2015/3/19
In the years 1987–1993 research aimed at the qualitative and quantitative composition of insects inhabiting the cones of Norway spruce (Picea abies [L.] Karst.) was carried out in the area of the Tatr...
Variability of spruce (Picea abies [L.] Karst.) compression strength with present reaction wood
strength parallel to grain spruce compression wood
2015/3/16
The aim of research was to find out the variability of spruce (Picea abies [L.]) Karst.) wood compression strength limits in the direction parallel to grain. The wood strength was examined using sampl...
Plant community variability within potential natural vegetation units: a case study from the Bohemian Karst
vegetation classification vegetation variability potential natural vegetation
2015/3/16
Based on a map of potential natural vegetation (PNV), actual vegetation was studied in the Mramor locality (106.4 ha). A total of 188 relev閟 were examined using stratified random sampling. A compariso...
Assimilation apparatus variability of beech transplants grown in variable light conditions of blue spruce shelter
beech transplants light nutrient content of leaves fluorescence of chlorophyll leaf area
2015/3/12
The paper valuates the differences in the selected characteristics of the assimilation apparatus of beech transplants growing in various light conditions of blue spruce small pole stage in the Jizersk...
Addressing spatial variability in provenance experiments exemplified in two trials with black spruce
Picea mariana (Mill.) provenance research REML spatial variation
2015/3/6
Two exemplary black spruce (Picea mariana [Mill.] B.S.P.) provenance trials were analyzed using traditional and spatial techniques. The objective was to find out possible differences between these app...
Variability in density of spruce (Picea abies [L.] Karst.) wood with the presence of reaction wood
spruce density compression wood
2015/3/6
The study was aimed to assess the integral value that determines wood properties − wood density at a moisture content of 0% and 12%. The wood density was researched in a sample tree with the pre...