搜索结果: 1-9 共查到“林业基础学科 variability”相关记录9条 . 查询时间(0.031 秒)
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...
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...
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...
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...
Variability of acorn nutrient concentrations in pedunculate oak (Quercus robur L.) genotypes
chemical composition embryo
2015/3/3
The objective of this study was to determine mineral element concentrations (N, P, K, Ca, Mg, Na, Fe,
Zn, Mn, and Cu) in various parts of pedunculate oak acorns to estimate variability in the chemica...
Spatial and Temporal Variability of Soil Respiration Rate at a Small Watershed Revegetated with Japanese Cypress
Q10 seasonal fluctuation soil respiration spatial distribution
2009/8/28
Soil respiration rate was measured for 2.5 years along the slope at Kiryu Experimental Watershed in Shiga Prefecture, Japan. The soil respiration rate was lower at the bottom of slope with saturated c...