搜索结果: 1-15 共查到“林学 yield”相关记录20条 . 查询时间(0.078 秒)
Biomass Yield and Economic, Energy and Carbon Balances of Ulmus pumila L., Robinia pseudoacacia L. and Populus × euroamericana (Dode) Guinier Short-Rotation Coppices on Degraded Lands under Mediterranean Climate
Siberian elm black locust poplar deciduous tree species energy crops renewable energy solid biofuel wood pellets
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2023/12/15
The steadily increasing demand for energy and concerns about climate change have prompted countries to promote the use of renewable energy sources, including lignocellulosic biomass. In this context, ...
Effect of Species Composition on Growth and Yield in Mixed Beech–Coniferous Stands
mixed stand soil trophicity mean height dominant height species composition mean annual volume increment
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2023/11/22
Research Highlights: In mixed stands, competitive and supportive relationships occur between trees, illustrated by their dendrometric characteristics. Background and Objectives: We investigated the ef...
Variability in growth and cadmium accumulation capacity among willow hybrids and their parents: implications for yield-based selection of Cd-efficient cultivars（图）
柳树 杂交子代 镉 积累能力
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2023/6/2
上个世纪90年代，北美灌木柳育种计划在纽约州启动，经过30多年的杂交、选育以及在美国中、北部的区域试验，选育了一大批高产、高抗的灌木柳栽培品种，目前很多品种在美国已商品化生产。在北美纽约州、宾夕法尼亚州等地，灌木柳被广泛用于工业污染地、垃圾填埋场的植物修复、公路防风雪篱以及生物质能源生产。尽管国际上在柳树重金属污染修复方面做了大量研究，筛选出很多对重金属具有高积累、耐性以及转移的品种，但是重金属积...
Overexpression of the 3-hydroxy-3-methylglutaryl-CoA synthase gene LcHMGS effectively increases the yield of monoterpenes and sesquiterpenes
3-hydroxy-3-methylglutaryl-CoA LcHMGS synthase gene
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2023/6/5
Monoterpenes are important components of plant essential oils and have long been used as raw materials for spices and food flavorings. A number of studies have been performed to increase the content o...
Yield and crown structure characteristics in a black locust (Robinia pseudoacacia L.) stand: A case study – Short Communication
forest regeneration crown indices crop tree selection volume production non-native tree species
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2018/3/6
The paper provides the results of a detailed analysis of timber volume and the most important crown variables of black
locust (Robinia pseudoacacia Linnaeus) based on an experimental plot in southern...
Energy yield of logging residues of the south-eastern region of the Czech Republic
wood chips renewable sources energy potential
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2015/8/27
The study analyses data obtained from the production of energy chips from logging residues. Geographically, the data come from the south-eastern portion of the Czech Republic. 6,671 t of energy chips ...
Does prolonged stratification of Douglas fir influence the yield of seedlings?
provenance germination emergence
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2015/7/2
A total of ten seed lots were used for evaluating germination capacity, originating from the Czech Republic, Slovakia,
France and the USA. Germination capacity, emergence rate and yield of seedlings...
Effect of Melampsora larici-populina on growthand biomass yield of eight clones of Populus nigra
biomass yield Melampsora larici-populina Kleb. poplar resistance
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2015/3/27
This study evaluates the effect of the identified pathogenic races E1, E2 and E3 of the leaf rust Melampsora larici-populina on some growth traits and biomass yield in the species Populus nigra. A fie...
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
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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...
Stability of the development of basic stand parameters of beech yield tables constructed on the basis of short-term observations on research plots
beech mean diameter mean height top height yield curves yield tables
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2015/3/19
We compared the development of yield curves of mean and top height and development of mean diameter according to yield tables of beech which were constructed on the basis of short-term investigations ...
Forest yield index and its applicability to the assessment of future forest yields
forest growth wood production final cutting yield
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2015/3/17
The paper suggests and examines a simplified relative indicator of forest production, with special regard to possibilities of its use in projecting future forests. Forest yield index (IY), based on an...
Models of assortment yield tables for poplar clones
poplar clones timber quality assortment production assortment yield tables
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2015/3/12
The results of research on the production of raw timber assortments for the stands of poplar clones Robusta and I-214 in Slovakia are presented in this paper. Models of assortment yield tables were co...
Development of the primary values of yield tables of spruce in comparison with their development on permanent research plots
spruce yield tables yield curves
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2015/3/3
Development of yield curves of mean and top height and development of mean diameter of the yield tables
of spruce is compared with their development on 28 permanent research plots with 156 repeated ...
Effects of zinc and nitrogen fertilizer and their application method on yield and yield components of Phaseolus vulgaris L.
Phaseolus vulgaris Zinc Spray Nitrogen Fertilizer
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2013/2/27
An experiment in factorial format based on randomized complete block design with 3 replications was conducted to study the effects of zinc spray (0 and 1 g/L) and nitrogen fertilizer (0, 25, 50 and 75...
Changes in riparian area structure, channel hydraulics, and sediment yield following loss of beaver dams
beaver dams channel hydraulics dam removal flow velocity mountain stream riparian area structure sediment yield wetlands
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2010/8/31
Channel structure, riparian zone structure, and sediment transport capacity were investigated for Sandown Creek, a stream in the East Kootenay region of British Columbia where beaver dams were removed...