搜索结果: 1-15 共查到“森林土壤学 forest soils”相关记录15条 . 查询时间(0.062 秒)
Carbon Feedback from Forest Soils will Accelerate Global Warming,26-Year Study Projects
Carbon Feedback Forest Soils Accelerate Global Warming 26-Year Study Projects
2017/10/25
After 26 years, the world’s longest-running experiment to discover how warming temperatures affect forest soils has revealed a surprising, cyclical response: Soil warming stimulates periods of abundan...
Neutralizing acidic forest soils boosts tree growth,causes spike in nitrogen export
Neutralizing acidic soils tree growth causes spike nitrogen export
2016/7/4
A legacy of acid rain has acidified forest soils throughout the northeastern US, lowering the growth rate of trees. In an attempt to mitigate this trend, in 1999 scientists added calcium to an experim...
Available nitrogen in the surface mineral layer of Serbian forest soils
A-value C/N ratio total organic C total soil N
2015/3/27
Based on a greenhouse experiment, we evaluated nitrogen availability in the surface mineral layer of soil under various deciduous forest stands by analysing the following soil characteristics: total o...
Saturated hydraulic conductance of forest soils affected by track harvesters
forest soil saturated hydraulic conductivity hauling technology Guelph permeameter
2015/3/27
The exact data from the field of soil mechanics from specific forest stands exposed to forestry mechanization operation were obtained. Field surveys were performed on four study plots within the K"...
Possibilities of using the portable falling weight deflectometer to measure the bearing capacity and compaction of forest soils
deflection E-module PFWD soil bearing capacity soil compaction soil reaction
2015/3/20
The paper discusses possibilities of using the portable falling weight deflectometer to measure the bearing capacity and compaction of forest soils. Within the study, measurements were made using manu...
Development of forest soils in the Krkonoše Mts. in the period 1980–2009
acidification air pollution Krkonoš e Mts liming multidimensional analysis soil dynamics
2015/3/19
This paper documents the development of soil conditions in the set of 32 permanent research plots in the Krkonoše (Giant) Mts. These plots represent an altitudinal gradient covering the ecosystem...
Effects of spruce, beech and mixed commercial stand on humus conditions of forest soils
tree species composition soil forest floor reserves
2015/3/16
A pedological survey was carried out in a spruce monoculture, beech stand, and in a mixed stand at a field research station in R醞ec-N靘鑙ce of the Institute of Forest Ecology (IFE), Mendel University of...
Restoration of forest soils on reforested abandoned agricultural lands
afforestation agricultural land soil restoration species composition humus forms litter formation
2015/2/2
Restoration of forest soil character after the change of agricultural land use has not been studied yet despite the large areas reforested since the late 40ies of the last century. This process takes ...
Acid phosphomonoesterase activity in floodplain forest soils
soil acid phosphomonoesterases forest soils
2015/1/30
The 4-nitrophenyl phosphate method for acid phosphomonoesterase (EC 3.1.3.2; acid orthophosphoric monoester phosphohydrolase) determination was slightly modified to increase the sensitivity and the st...
A contribution to the effect of liming on forest soils: review of literature
liming and properties forest soils
2015/1/29
Extensive forest areas were ameliorated by large-scale liming in the last years in order to prevent proceeding acidification and degradation of forest soils. The hitherto knowledge of liming effects o...
Biological activity, nitrogen dynamics, and chemical characteristics of forest soils in the Šumava national park
Š umava NP Picea abies soil chemistry
2015/1/29
This paper deals with large-scale mountain forest decline in the Šumava National Park. The changes in biotic and abiotic properties of forest sites follow the tree layer disintegration. Changed m...
Methods for the Assessment of Humic Substances Quality in Forest Soils
forest soils humus quality DRIFT spectroscopy humic acids fulvic acids humin
2015/1/28
This paper is focused on soil organic matter quality assessment in acid forest soils. Soil samples were collected in the Jizera Mountains region. Vegetation cover of sampling sites was formed by spruc...
The Quantitative Estimate of Bioavailable Inorganic Phosphorus Content in Forest Soils by the Modification of the Anion-Exchange Resin Method
soil phosphorus forest soils available P determination
2015/1/28
The anion-exchange resin (AER) method for the estimation of bioavailable phosphorus was slightly optimised for soils with high contents of readily soluble organic compounds as well as for those having...
Carbon Storage in Forest Soils Recovers Rapidly following Disturbance by Mass Wasting
Carbon Storage Forest Soils Mass Wasting
2009/12/16
Soils comprise the largest non-marine carbon pool, exceeding that of the atmosphere and terrestrial biosphere combined. The high carbon storage potential of forest soils and the large area of forested...
Soil Compaction on Forest Soils from Different Kinds of Tires and tracks and Possibility of Accurate Estimate
soil compaction tracks depth of ruts porosity
2009/2/7
An 8-WD forwarder loaded with 9,520 kg of timber, and fitted with low or high tire pressures, or tires rounded with tracks, was repeatedly driven on soil for 1, 8 and 24 passes to investigate mechan...