搜索结果: 1-15 共查到“农学 Quercus”相关记录29条 . 查询时间(0.062 秒)
常绿树。主干优势明显，树皮灰色，尚未开裂。每年抽稍3-4次。叶片革质，上面亮绿或深绿色，下面灰白或浅绿色。叶形多长椭圆形或长矩圆形，叶顶渐尖，叶基半圆或契形。叶缘具均匀排列的粗锯齿5-7对，叶脉6-8对。叶较大，长8-11cm，宽3-4cm，叶形指数2.67（2.26-3.0），叶柄长3-6mm。该品种生长优势显著，6年生米径5.8cm和树高4.3m，分别超过周围5株优势木平均值的33.6%和12...
常绿树，已结实。主干通直，侧枝平展。树皮灰色，尚未开裂。每年抽稍3-4次。叶片革质，上面亮绿色，下面灰白色。叶形倒卵形，叶顶钝圆，叶基契形。叶缘两侧多呈光滑的波状凸起或浅浅的园齿4-6对，叶脉8-10对。叶片较大，长6.5-13cm，宽2.5-5cm，叶形指数2.51（2.24-2.75），叶柄长4-8mm。该品种生长优势显著，6年生米径6.85cm和树高4.7m，分别超过周围5株优势木平均值的1...
The effect of biochar amendment on the growth, morphology and physiology of Quercus castaneifolia seedlings under water-deficit stress
Biomass Chestnut-leaved oak Water deficit Photosynthesis Xylem water potential
2024/2/28
Water stress is one of the most important environmental stresses which can adversely affect soil fertility and plant growth in arid and semiarid regions. In this study, biochar was used as a type of s...
Quantitative and qualitative evaluation of Northern red oak (Quercus rubra L.) in arid areas of North-Western Bohemia
exotic oak domestic oak growth tree quality stand quality health status
2018/3/6
The article analyses growth and quality of Northern red oak (Quercus rubra Linnaeus) based on 13 research plots
(seven in red oak stands and six in sessile oak stands) with the ages between 17 to 159...
Phytoseiid mites on Quercus cerris in an urban park – short communication
Phytoseiidae Acari turkey oak species diversity host plant
2017/6/26
The community of phytoseiid mites on the leaves of non-indigenous Quercus cerris was studied in an intensively managed urban park during the years 2012–2014. Five phytoseiid species, namely Kampimodro...
Assessment of root-shoot ratio biomass and carbon storage of Quercus brantii Lindl. in the central Zagros forests of Iran
carbon sequestration crown diameter component Persian oak growth form
2018/3/6
Assessment of carbon storage build-up in tree stems is a difficult task due to the lack of information on their carbon
sequestration potential and allocation in different components. Similarly, high ...
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 ...
The root system of pedunculate oak (Quercus robur L.) at the margins of regenerated stands
forest regeneration stand margin edge effect tree morphology mortality microclimate
2017/4/6
The paper aims to contribute to the determination of reasons causing the irregular growth of young pedunculate oaks occurring at the margins of naturally and artificially regenerated plots neighbourin...
Radial evolution of vascular elements in the oak Quercus ilex L. wood
vessel diameter number of vessels early wood latewood evolution
2016/11/11
In order to describe and measure the evolution of vascular elements in time, we examined two groups of samples of the green oak (Quercus ilex Linnaeus) wood. These groups are on the same radial plane ...
Physiological responses of seedlings of different Quercus castaneifolia C.A.Mey.provenances to heterogeneous light environments
peroxidase quantitative activity Hyrcanian forest chlorophyll content
2016/11/11
In this study, five biochemical traits obtained for seedlings of five different provenances of Quercus castaneifolia C.A. Meyer were used to evaluate the available light environment using instantaneou...
Effects of different irradiance levels on peroxidase activities in Quercus castaneifolia C.A.Mey.seedlings from different provenances
Hyrcanian vegetation zone abiotic stress polyacrylamide gel electrophoresis
2016/8/2
To understand the function of peroxidase (POD) in relation to a light gradient, changes in POD activity were studied in five different provenances of chestnut oak seedlings. An experiment was conducte...
Comparison of the bond strength of oak (Quercus L.) and beech (Fagus sylvatica L.) wood glued with different adhesives considering various hydrothermal exposures
adhesion of wood hydrothermal exposure oak beech
2015/5/18
The investigation of the hydrothermal exposure effect on the glue-line strength is obvious when outdoor
application of wood products is in option.
First observation of Quercus pedunculiflora C. Koch in the Italian Peninsula
Grayish oak Low Murgia Plateau Lama Lamasinata ecology refuge area
2015/4/24
A few individuals of Grayish oak have been observed in the Low Murgia Plateau, Puglia Region. This is the first time that Quercus pedunculiflora C. Koch has been found in Italy. The territory is domin...
Growth characteristics of oak (Quercus petraea [Mattusch.] Liebl.) stand under different thinning regimes
oak Quercus petraea Mattusch Liebl. thinning promising trees target trees
2015/4/14
In the paper, selected quantitative characteristics of 57-year-old oak pole stage stand were analysed on plots with different thinning regimes at its establishment. Six thinning treatments were perfor...
How do lepidopteran seasonal guilds differ on some oaks (Quercus spp.) ?A case study
Slovakia oaks seasonal guilds
2015/3/16
The differences between oak lepidopteran communities were studied in Slovakia in 1993 and 1994. Sampling was undertaken between April and October on 3 oak species (Quercus robur, Q. petraea, Q. rubra)...