搜索结果: 1-12 共查到“林学 spruce forests”相关记录12条 . 查询时间(0.062 秒)
Comparison of Myriapoda in beech and spruce forests
Chilopoda Diplopoda Isopoda Norway spruce Beskydy Mts
2015/8/14
Pitfall traps were used to capture 3,550 individuals and 34 species of Myriapoda in five pairs of Norway
spruce and beech stands in the Moravskoslezské Beskydy Mts. (Czech Republic). Diff...
Sawflies (Hymenoptera: Symphyta) in the northeast of the Czech Republic with special regard to spruce forests
Malaise trap faunistics host plants abundance
2015/5/18
Sawflies were collected in the northeast of the Czech Republic using Townes type Malaise traps. Traps
were placed in eleven young Norway spruce (Picea abies) forests during the period from 1998 to 1...
Coarse woody debris carbon stocks in natural spruce forests of Babia hora
Babia hora nature reserve deadwood decay elevation natural forest wood density
2015/3/19
Although coarse woody debris (CWD) represents one of the major carbon pools in natural forest ecosystems, little information is available about its CWD carbon stocks. This study demonstrates the impor...
Ecological requirements of some ant species of the genus Formica (Hymenoptera, Formicidae) in spruce forests
Formica ecological requirements spruce forests
2015/3/17
Five types of stand stages (clearings-samplings, plantations, thinnings, thickets, and mature forests) of spruce forests were examined at the foothills of the Jizerské hory Mts. in summer 2005 and 200...
Differences in top-soil features between beech-mixture and Norway spruce forests of the 妘mava Mts.
fulvic acids humic acids organic matter Oribatida
2015/3/16
Top-soil samples were taken from four mountain forest ecosystems in the Bohemian Forest to compare the processes in European beech-mixture (Fs) and Norway spruce (Pa) dominating ecosystems. Selected p...
Sawflies (Hymenoptera: Symphyta) in the northeast of the Czech Republic with special regard to spruce forests
Malaise trap faunistics host plants abundance
2015/5/6
Sawflies were collected in the northeast of the Czech Republic using Townes type Malaise traps. Traps were placed in eleven young Norway spruce (Picea abies) forests during the period from 1998 to 199...
Changes in the mycorrhizal status of some mountain spruce forests
mycorrhizal fungi defoliation Picea abies
2015/3/6
In the present study, the defoliation status of spruce stands is related to mycorrhizal conditions and presence of mycorrhizal macromycetes fungi in two localities at the highest sites of the Krkono&#...
Induction thinnings of mountain spruce forests
spruce induction thinnings thinning percent type of thinning thinning interval thinning index
2015/2/2
The paper presents models of decennial thinning percents of spruce in mountain locations. They were derived by regression fitting from empirical material with 108 measurements on 93 research plots. Mo...
Mountain Norway spruce forests: Needle supply and its nutrient content
Š umava Mts. (Bohemian Forest) Mountain Norway spruce forest
2015/1/29
Soon after bark-beetle attack as well as after clear cutting, grown-up mountain Norway spruce forest cast the following mass of needles: 50–60 kg of dry matter per tree, or 18–20 tons per hectare, con...
Productivity of timber extraction by Urus MIII cable crane from selective spruce forests
Urus MIII cable crane carriage timber production time study
2010/9/10
The purpose of this study is to investigate the productivity of the Urus MIII cable crane during yarding of spruce timber from spruce stands in North Eastern Turkey. Cable crane productivity is deter...
The impacts of timber harvesting techniques on residual trees, seedlings, and timber products in natural oriental spruce forests
Logging manpower skidder skyline harvesting damage
2010/9/10
The impacts of three timber harvesting techniques (manpower, skidder, and skyline) on residual trees, seedlings, and timber products were investigated in natural oriental spruce stands in Artvin, Turk...
Evaluation of two harvesting systems for the supply of wood-chips in Norway spruce forests affected by bark beetles
biomass wood-chips Picea abies bark beetle
2009/2/7
For sanitary reasons, spruce trees affected by bark beetles (Ips typographus L.) should be re¬moved out of the stand as soon as possible, to avoid the propagation of the beetles to healthy trees. ...