搜索结果: 1-15 共查到“农学 Conversion”相关记录23条 . 查询时间(0.074 秒)
Species, Climatypes, Climate Change, and Forest Health: A Conversion of Science to Practice for Inland Northwest (USA) Forests
climate-change impacts ecosystem responses to climate species distributions climatype distributions adaptive management
2023/12/6
Research Highlights: This paper integrates disparate research results pertaining to climate change impacts to 12 co-occurring forest tree species and their climatypes such that management options for ...
Conversion between duplicated genes generated by polyploidization contributes to the divergence of poplar and willow
Poplar Willow Polyploidization Duplicated genes Gene conversion
2023/11/28
Gene conversion has an important effect on duplicate genes produced by polyploidization. Poplar (Populus trichocarpa) and willow (Salix brachista) are leading models and excellent green plants in the ...
Large macroaggregate properties are sensitive to the conversion of pure plantation to uneven-aged mixed plantations
pure plantation mixed plantations Large macroaggregate properties
2023/6/5
In forestry, stand conversion influences soil physicochemical and biological properties, yet the effects of conversion of pure plantation to uneven-aged mixed plantation on soil aggregate distribution...
Effects on Greenhouse Gas (CH4, CO2, N2O) Emissions of Conversion from Over-Mature Forest to Secondary Forest and Korean Pine Plantation in Northeast China
secondary forests over-mature forests Korean pine plantation greenhouse gas fluxes global warming potential
2024/2/29
This study aimed to evaluate the seasonal variations of Greenhouse Gas fluxes (CH4, CO2, and N2O), Greenhouse Gas (GHG) emissions, and Global Warming Potential (GWP) over the extent of the regions and...
Gross value yield potential of coppice, high forest and model conversion of high forest to coppice on best sites
conversion coppice high forest oak average annual cut average gross value yiel
2015/3/27
Based on yield tables for oak high forest and oak coppice (both first site class) and using assortment tables and assortment prices in the Czech Republic in 2009, a set of variants of conversion of hi...
The first reaction of soil mite fauna (Acari, Mesostigmata) caused by conversion of Norway spruce stand in the Szklarska Por阞a Forest District
Mesostigmata mites forest conversion
2015/3/16
To observe the first reaction of Mesostigmata mites for conversion of even aged spruce stands under conversion with common beech and silver fir, four pairs of experimental plots directly neighbouring ...
An economic aspect of conversion of Scots pine (Pinus sylvestris L.) stands in the Polish Lowland
Pinus sylvestris pine stands oak stands
2015/3/16
Pine stands at fertile sites need conversion into broadleaved or mixed forests. Yet, according to the age of stand, conversion may have different economic results. Therefore, in order to reduce costs ...
Intensively fertilised seedlings of the beech (Fagus sylvaticaL.) for artificial regeneration of the spruce stands in the process of conversion
European beech fertilisation containerised seedlings
2015/3/12
Artificial regeneration of autochthonous target tree species plays an important role in the process of conversion of forest stands. The European beech is one of the most suitable and most frequently u...
Conversion of even aged forest managed under the system involving coupes to selection forest in Klepacov
conversion to selection forest curve of diameter frequencies secondary stand tree species composition
2015/3/12
The paper evaluates the development of the tree numbers, secondary stand and species composition on eight partial control plots in Klepačov where the conversion of even aged forest managed under ...
Impact of Arable Land to Grassland Conversion on the Vegetation-period Water Balance of a Small Agricultural Catchment (Němčicky Stream)
hydrological extremes hydrological modelling land use change water balance
2015/3/2
This paper presents results of decadal (10-day) water balance simulations for the vegetation periods (April to October) of 2001 (normal year), 2002 (wet year) and 2003 (dry year) in the Němčicky ...
Conversion of some soil types, subtypes, and varieties between the Taxonomic Classification System of Soils of the Czech Republic and the World Reference Base for Soil Resources
refinement of soil classification systems soil conversions TKSP CR, WRB
2015/3/2
The article illustrates the compatibility of the Czech Republic Taxonomic Soil Classification System validated in the CR with the international World Reference Base for Soil Resources. It utilises the...
Conversion of substitute tree species stands and pure spruce stands in theOreMountains inSaxony– A Report
substitute tree species stands pure spruce stands species composition conversion Ore Mountains Mts. Germany
2015/2/6
The original natural forest ecosystems of the OreMountains(Norway spruce, silver fir, and beech forests) have been destroyed by overcropping since the 11th century. In the 19th century spruce afforest...
Effect of Aflatoxin on Feed Conversion Ratio in Broilers: A Meta-analysis
Aflatoxin Feed Conversion Ratio Broilers Meta-analysis
2016/5/9
Aflatoxins are natural contaminants of poultry feeds and feed ingredients and cause liver damage, immunosuppression, reduction in performance and mortality in broilers. A number of studies have been c...
Micro-level determinants of woodland conversion to arable lands and implications for policy in Eastern Nigeria: A Factor-Factor Analysis
Factor-factor analysis woodland conversion determinants forest conversion land-use change
2011/1/12
The study empirically examined the micro-level determinants of woodland conversion to arable lands in the Sub-Saharan Region of Africa, taking Eastern Nigeria as an example. This is informed by the in...
Econometric analysis of the micro-level determinants of woodland conversion to arable cropping and implications to policy in the eastern Nigeria
Woodland conversion farmer’s characteristics farmer’s decision parameters
2011/1/11
An empirical investigation was carried out to understand the impact of micro-level determinants of woodland conversion on arable cropping in the Sub-Sahara region of Africa because of the increasing r...