搜索结果: 1-15 共查到“农学 natural regeneration”相关记录17条 . 查询时间(0.546 秒)
Comparison of Natural Regeneration in Natural Grassland and Pine Plantations across an Elevational Gradient in the Páramo Ecosystem of Southern Ecuador
Andes species richness vegetation assemblage plant cover natural grassland soil properties
2024/2/29
During the 1980s, reforestation programs using exotic species (Pinus spp.) were established in the páramo ecosystem of Ecuador. The aims of this study were: (1) to compare the natural regeneration bet...
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...
Natural regeneration of sessile oak under different light conditions
sessile oak natural regeneration light conditions close-to-nature forest management
2015/3/27
Different variants of regeneration felling or different light conditions (total site factor 15–95%) and weed control were evaluated in relation to the 4-year development of individuals of regenerated ...
Influence of micro-relief and weed competition on natural regeneration of mountain forests in the Šumava Mountains
Czech Republic micro-relief mountain forests natural regeneration weed competition
2015/3/19
Natural regeneration and its relationship to micro-relief and weed competition were studied on 6 research plots in mountain spruce forests in the Šumava Mountains. The data on density regeneratio...
Analysis of herbicide effects on Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) natural regeneration
Douglas fir herbicides introduced tree species natural regeneration
2015/3/19
Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) natural regeneration under parent stand after weed suppression was investigated in the area of the Training Forest Enterprise in Kostelec nad Če...
Dynamics of natural regeneration of even-aged beech (Fagus sylvatica L.) stands at different shelterwood densities
European beech Fagus sylvatica L. natural regeneration natural reserve stand density
2015/3/19
The article presents results of research focused on the development of natural regeneration of beech stands in the National Natural Reserve Voděradské bučiny, based on information acquired in reg...
Natural regeneration of senescent even-aged beech (Fagus sylvatica L.) stands under the conditions of Central Bohemia
seedling survival mortality Vodě rady Beechwoods
2015/3/16
The natural regeneration of beech (Fagus sylvatica L.) was studied under various shelterwood densities and silvicultural treatments in senescent beech stands in Central Bohemia. Four permanent researc...
The effects of cutting regimes on natural regeneration in submountain beech forests: species diversity and abundance
regeneration development stand density shelterwood cutting clear cutting Fagus sylvatica L.
2015/3/12
The paper summarizes the results of 15-year natural regeneration for beech of five plots with different densities situated in the Western Carpathians Mts. Three of the plots were subjected to differen...
Natural regeneration of Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) in forest stands of Hurky Training Forest District, Higher Forestry School and Secondary Forestry School in Pisek
self-seeding advance growth radiation
2015/3/6
Possibilities are assessed of the natural regeneration of Douglas fir under conditions of Hůrky Training Forest District, Higher Forestry School and Secondary Forestry School in Písek, in stand 1...
Development of the spruce natural regeneration on mountain sites in the Šumava Mts.
Bohemian Forest Mts. National Park mountain spruce forests
2015/3/3
The aim of this study was the evaluation of the spruce natural regeneration growth and development in
Modrava and Plechy areas, which represent the first and late bark beetle attack areas. Study was...
Effects of game on the condition and development of natural regeneration in the Vrapač National Nature Reserve (Litovelské Pomoraví)
natural regeneration Capreolus capreolus Dama dama
2015/3/3
In 2001–2005, the effects of game on the condition and development of natural regeneration of a floodplain
forest were studied in three permanent transects in the Vrapač National Nature Reserve...
A role of the mechanical preparation of soil in the natural regeneration of pedunculate oak (Quercus robur L.) in floodplain forests
mechanical preparation of soil weed natural regeneration pedunculate oak floodplain forest
2015/2/6
The subject of our research was to verify effects of the mechanical preparation of soil in the natural regeneration of pedunculate oak in a floodplain forest. On the site of a hard-wooded floodplain f...
Analysis of Pseudoreplicants to Evaluate Natural Regeneration after Applying Prescribed Burns in a Temperate Forest of Mexico
Nonreplicated Study Fire Effect Pinus michoacana Pinus oocarpa Forest Fires
2013/3/4
Although fire is one of the most important disturbing factors of forest in Mexico, little it is known on the effects of fire on the particular Mexican forest ecosystems. This is remarked for the fact ...
Effect of Thinning on the Natural Regeneration of Broad-leaved Trees in Abies sachalinensis Plantations
Abies sachalinensis plantation broad-leaved tree light condition natural regeneration thinning
2009/8/27
To examine the conversion of conifer plantations to mixed forests comprising coniferous and broad-leaved trees, we investigated responses of understory vegetation to variable-intensity thinning in 39-...
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...