搜索结果: 16-30 共查到“知识库 森林病理学”相关记录100条 . 查询时间(0.863 秒)
Effect of Melampsora larici-populina on growthand biomass yield of eight clones of Populus nigra
biomass yield Melampsora larici-populina Kleb. poplar resistance
2015/3/27
This study evaluates the effect of the identified pathogenic races E1, E2 and E3 of the leaf rust Melampsora larici-populina on some growth traits and biomass yield in the species Populus nigra. A fie...
Stable Agrobacterium-mediated transformation of Norway spruce embryogenic tissues using somatic embryo explants
Agrobacterium tumefaciens genetic engineering GUS activity Picea abies Karst
2015/3/27
In conifers and other plants with long reproductive cycles, transformed embryogenic tissues can serve as a convenient source of plant material for the testing of insecticidal or fungicidal transgene e...
The extent of root rot damage in Norway spruce stands established on fertile sites of former agricultural land
afforestation of agricultural land Kruž berk area Luž ná area Norway spruce root rot
2015/3/20
The aim of this study was to compare the degree of root rot damage in two large complexes of Norway spruce stands established on former agricultural land at fertile sites. The root rot infection was o...
The survey of some factors affecting bark lesion development caused by Phytophthora cactorum on common beech and other broadleaved trees
artificial infection bark lesion broadleaved trees pathogenicity common beech Fagus sylvatica Phyto-phthora cactorum substrate specificity water stress
2015/3/19
The three experiments relating to the pathogenicity of Phytophthora cactorum to beech and other forest tree species were carried out. The experiments were aimed to confirm pathogenicity of the pathoge...
Effects of drainage treatment and stand growth on changes in runoff components from a forested watershed
drainage treatment forested watershed recession limb runoff components stormflow hydrograph
2015/3/19
Runoff generation under various natural conditions has often been studied in forested watersheds for a long time. In 1967, Hewlett designed a variable source area model. The model is based on the expa...
Health status of forest stands on permanent research plots in the Krkonoše Mts
air pollution beech mixed and spruce stands damage defoliation health status Krkonoš e Mts. transition matrices
2015/3/19
Damage to beech, mixed (beech with spruce to spruce with beech) and spruce stands in the Krkonoše Mts. is described on the basis of evaluation of transition matrices describing the probability of...
Comparison of general tree characteristics of less known oak species Quercus dalechampii Ten. and Quercus polycarpa Schur
Quercus polycarpa Schur Quercus dalechampii Ten. dry rot stem characteristics
2015/3/12
This study was designed to evaluate basic tree characteristics of Quercus dalechampii Ten. and Quercus polycarpa Schur and to find out differences between them. Total height, height of crown base and ...
Current state of beech bark necrotic disease in Southern Poland
beech Fagus sylvatica L. necrotic disease stem crown part Southern Poland
2015/3/12
The degree of the beech bark necrotic disease was evaluated in three selected localities in southern Poland, in different orographic complexes, Beskid Sądecki, Beskid Niski, and Bieszczady. The d...
The authors elaborated a new complex methodical approach to the evaluation of necrotic disease of beeches. They used two evaluation scales: a scale for the evaluation of stems and a scale for the eval...
Effect of forest tree species on the humus form state at lower altitudes
humus forms species composition site degradation species effect on soil
2015/2/6
The paper documents the effects of forest stands of different species composition on the humus form state and soil profile chemistry. It compares the situation in mixed broadleaved (ash, oak, hornbeam...
Development of beech necrotic disease in the growing phase of maturing stand under air pollution stress
Fagus sylvatica L. necrotic disease defoliation growth phase of maturing stand pollutants Central Slovakia
2015/2/6
The paper compares the state of the necrotic disease of beech stem bark on three research plots in 2004 with 1995. The investigated objects were three research plots of beech in the growing phase of m...
Forest decline and pedobiological characteristics of humus forms in the Šumava National Park
Š umava National Park mountain spruce forests forest decline bark beetle microbial activity respiration activity nitrogen mineralization soil chemistry humus forms
2015/2/6
Humus forms dynamics and characteristics of different forest sites were studied in the area of Smrčina Mt. in the Šumava National Park territory. The study was performed in vital Norway spru...
Oak mildew – possibilities of its control
oak mildew Microsphaera alphitoides control fungicides biopreparations
2015/2/6
New possibilities of oak mildew (Microsphaera alphitoides) control were tested and compared with present methods. The results of three-year experiments in 6 localities (Cikar, Budkov, Planá nad Lu&...
Effects of pressure on the root systems of Norway spruce plants (Picea abies[L.] Karst.)
root growth stress pressure RAI Picea abies(L.) Karst
2015/2/6
Roots are stressed quire often under natural conditions, e.g. when considering sloping terrain, layers of fluvial deposits, huge layers of melting snow, load of heavy forest machinery during logging a...
Dynamics of oak mycorrhizas
ectomycorrhizas ectomycorrhizal fungi Quercus– oak root forest stability
2015/2/6
A decline of macromycetes, especially of ectomycorrhizal species, has been described in the last decade in various parts of Europe. These changes are attributed to direct or indirect effects of air po...