搜索结果: 61-75 共查到“知识库 森林土壤学”相关记录251条 . 查询时间(2.178 秒)
Differential diameter-size effects of forest management on tree species richness and community structure: implications for conservation
Differential diameter-size effects tree species richness
2015/11/13
In this paper we tested the hypothesis that logging effects in the adult tree
community reverberate upon the regeneration contingent. We examined the differences on
the tree community between forest...
Tropical Forest Fragmentation Affects Floral Visitors but Not the Structure of Individual Based Palm-Pollinator Networks
Tropical Forest Fragmentation Visitors
2015/11/13
Deforestation is the major cause of fragmentation and spatial isolation of populations in the
tropics [1], with potential to increase species or population extinction rates [1,2]. Despite the
import...
Effects of rubber-tired skidder and farm tractor on physical properties of soil in plantation areas in the north of Iran
aspen skid trail skidding machine soil disturbance timber skidding
2015/9/15
Physical properties of soil can be affected by machines that are used for skidding which have the potential to impact soil sustainability and forest productivity. The present study evaluated the effec...
定西市安定区退耕还林地径流聚集工程的土壤增墒效果
退耕还林 径流调控工程 土壤水分 植被生长
2016/12/22
分析退耕还林地径流聚集工程的土壤增墒效果，为改善林地土壤水分供给研究提供依据。［方法］ 通过对甘肃省定西市安定区退耕还林地中径流聚集工程形式和造林模式的调查研究，分析半干旱地区隔坡水平阶、隔坡反坡台、正方形聚流坑、燕尾式聚流坑不同整地方式下林地增墒效果及其林草的生长发育状况。［结果］ 径流聚集工程具有明显的土壤增墒效果，在径流聚集工程作用下乔木树种单株水分供给总量达2.54～4.29 m3/（株·...
TOWARDS AN UNDERSTANDING OF UNCERTAINTY IN GREENHOUSE FOREST ASSESSMENTS
Remote Sensing Vegetation Land Cover Analysis Monitoring Global-Environmental-Databases
2015/7/29
Australia’s National Carbon Accounting System provides information on land-based sources and sinks of greenhouse gases to fulfil
international reporting obligations under the Kyoto Protocol, as well...
The effect of different tending on stand structure and quantitative production of European beech (Fagus sylvatica L.) stand in a selected region of East Slovakia
quantitative production free crown thinning
2015/5/18
The paper deals with assessment of a long-term experiment (45 and/or 53 years of investigation) in the
90-years-old European beech (Fagus sylvatica L.) stand in a selected region of East Slovakia. T...
The effect of coppice management on the structure, tree growth and soil nutrients in temperate Turkey
coppice soil growth dynamics forest management
2015/5/18
Coppicing was widespread throughout Europe for many centuries but was largely abandoned in the second half
of the 19th century. Currently, there has been a renewed interest in coppicing for biomass ...
Deforestation modelling using logistic regression and GIS
manmade areas physiographic factors
2015/5/18
A methodology has been used by means of which modellers and planners can quantify the certainty in
predicting the location of deforestation. Geographic information system and logistic regression ana...
Effect of Oriental beech root reinforcement on slope stability (Hyrcanian Forest, Iran)
root distribution slope stability
2015/5/5
Vegetation significantly affects hillslope mechanical properties related to shallow landslides and slope
stability. The objective of this study was to investigate and quantify the effect of Oriental...
Norway spruce litterfall and forest floor in the IUFRO thinning experiment CZ 13 – Vítkov
forest-floor layers litterfall Norway spruce thinning
2015/4/24
The effect of thinning on litterfall and decomposition of biomass was investigated in Norway spruce IUFRO thinning experiment (CZ-13), Czech Republic. The experiment was established in 1971 in an 8-ye...
The impact of juvenile tree species canopy on properties of new forest floor
afforestation agricultural land forest floor topsoil nutrients
2015/4/24
To keep forest soils fertile, forest practitioners plant mixed stands that are composed of both economically efficient trees such as conifers and soil-improving broadleaves. This is a mandated practic...
Influence of vegetation on phenolic acid contents in soil
Norway spruce larch rowan willow phenolic compounds pot experiment
2015/4/24
The study described in this paper was undertaken in order to assess the impact of different woody plants on the dynamics of phenolic acids in soil. The influence of plant litter on the amount of pheno...
Vertical force requirement for stump lifting
bio-energy stump diameter stump extraction force stump extraction machines stump lifting
2015/4/24
In harvest areas the soil preparation is occasionally necessary before reforestation including the removal, collection and transportation of stumps from the soil. Issues related to climate change and ...
Long-term response of understorey cover, basal area and diversity to stand density in a mixed oak forest on the Síkfőkút plot in Hungary
Quercus cerris shrub layer Acer campestre Shannon-Wiener index Evenness index shrub foliage cover
2015/4/24
The serious oak decline was reported for the 1979–80 period and 63.0% of adult oaks died in a mixed oak forest in the Síkfőkút site, Hungary. The data were used to obtain (1) quantitative informa...
The proportion of heartwood in conifer (Pinus sylvestris L., Picea abies [L.] H. Karst.) trunks and its influence on trunk wood moisture
pine spruce heartwood moisture content of wood
2015/4/24
As the tree age increases, the formation of heartwood takes place in the central part of the tree. Since there is a large difference in the moisture content between sapwood and heartwood in conifers, ...