搜索结果: 46-60 共查到“知识库 森林土壤学”相关记录251条 . 查询时间(1.955 秒)
Production and soil restoration effect of pioneer tree species in a region of allochthonous Norway spruce dieback
forest transformation regeneration methods birch aspen wood production soil chemistry
2017/4/6
The paper analyses the growth, structure, production and soil chemistry of different tree species stands 20 years after allochthonous spruce dieback. The experiment was carried out at lower altitudes ...
Gas exchange responses of two poplar clones (Populus euramericana (Dode) Guinier 561/41 and Populus nigra Linnaeus 63/135) to lead toxicity
physiological parameters phytoremediation soil contamination heavy metals stress
2016/10/14
To evaluate the lead tolerance of Populus euramericana (Dode) Guinier 561/41 and Populus nigra Linnaeus 63/135 clones in relation to photosynthetic efficiency, we measured physiological parameters of ...
中国林学会森林土壤专业委员会
中国林学会 森林土壤专业委员会 森林土壤学
2022/6/6
中国林学会森林土壤专业委员会，召开关于森林土壤为主要研究对象的学术会议，组织森林土壤工作者开展国内学术交流，活跃学术思想、促进学科发展与科技创新。发挥"森林土壤专业智库"优势，为森林土壤的合理利用，促进林业建设建言献策;特别是适地适树、不良立地改良、森林土壤质量评价、森林土壤养分评价、合理配方施肥、人工林地理衰退预警及恢复、农林废弃物基质化利用等方面发挥作用。
The structure of Scots pine and Black locust forests in the Northern Steppe of Ukraine
forest fund wood stock indexes of forest biometrics forest-forming species age structure functional categories of forest
2016/8/2
The article describes the distribution of areas of Scots pine (Pinus sylvestris Linnaeus) and Black locust (Robinia pseudoacacia Linnaeus) stands within the Northern Steppe of Ukraine based on forest ...
土壤呼吸（Rs）作用的空间异质性对于准确估算水土流失区碳收支具有重要意义. 通过对长汀县河田镇59个样地的土壤呼吸及土壤全氮（TN）、碳氮比（C/N）、有机碳含量（SOC）、叶面积指数（LAI）、土壤温度（T10）、土壤湿度（W）等影响因子测定的基础上，运用传统和地统计学的方法分析了土壤呼吸及其影响因子的空间异质性. 结果表明，Rs及其影响因子的变异程度大小依次为：LAI > SOC > TN >...
Forest park site selection based on a Fuzzy analytic hierarchy process framework (Case study:the Galegol Basin, Lorestan province,Iran)
suitability map weighted linear combination criteria decision-making Delphi method
2016/7/6
The aim of this study is to solve the forest park site selection problem using a Fuzzy analytic hierarchy process (FAHP) framework in the Galegol Basin, Lorestan province, Iran. The Delphi screening m...
Response of diameter and height increment to thinning in oak-hornbeam coppice in the southeastern part of the Czech Republic
drought European hornbeam growth of sprouts sessile oak soil moisture stump basal area
2016/6/3
The objective of this paper was to test the hypothesis that growth and soil moisture would increase after heavy thinning in seven years old oak-hornbeam coppice stand. Effects of thinning on (i) diame...
Silvicultural potential of northern red oak and its regeneration–Review
ecological niche acorn silvicultural systems soil
2016/5/11
Northern red oak (Quercus rubra Linnaeus) is a promising species which could help to mitigate the sanitary problems. Northern red oak is also a commercial species and offers many environmental service...
Quality of organic and upper mineral horizons of mature mountain beech stands with respect to herb layer species
forest floor top soil layers soil chemical characteristics Calamagrostis villosa Vaccinium myrtillus Avenella flexuosa
2016/5/11
The study analyses the chemical properties of the soil in open-canopy beech stands in relation to the predominant species of ground vegetation. A hypothesis is examined whether the predominant ground ...
Response of directly seeded high-value timber species to microorganisms,fertiliser and a water retention polymer:implications for reforestation of agricultural lands in Southeast Asia
forestry mycorrhizal fungi rehabilitation root nodule bacteria Rose woods
2016/4/6
High-value native timber species are being promoted in reforestation in Southeast Asia. However, slow growth during early establishment, coupled with poor soil fertility, poses challenges for promotin...
Changes of agricultural land characteristics as a result of afforestation using introduced tree species
agricultural land afforestation soil characteristics grand fir
2016/3/2
The paper documents the mid-term changes of the soil characteristics and upper soil dynamics in the stands of introduced tree species, grand fir and Douglas-fir, on the former agricultural lands. Thes...
Evaluating the effects of physiographic parameters on the road cross section in mountain forests (Case study: northern forests of Iran)
hillside slope rock base soil texture
2016/1/29
Road cross section, as one the main effective factors in relation to fill and cut volume, was effective in costs and disturbance of forest road constructions. In this research, the effect of a few phy...
黄河三角洲长期人工林地对土壤有机碳库的影响
黄河三角洲 人工林 活性有机碳 碳库管理指数
2016/12/23
探讨黄河三角洲长期人工林对盐碱土壤有机碳库的作用效果，为充分发挥其生态功能与经济效益提供科学依据与技术参考。[方法] 以刺槐、白蜡、白榆和臭椿纯林以及刺槐-白蜡、刺槐-白榆和刺槐-臭椿混交林等近30 a的7个长期人工林为研究对象，并分别设置标准池，采用多点混合采样法，研究土壤活性有机碳、碳库管理指数的变化规律。[结果] 3个混交林地土壤的微生物量碳含量较高，并显著高于其他林地，其中刺槐-白蜡混交林...
Detection of the effects of management and physical factors on forest soil carbon stock variability in semiarid conditions using parametric and nonparametric methods
soil organic carbon CART modelling, neural networks
2015/11/26
Forest soils in western parts of Iran are being degraded by inappropriate management. The soil organic carbon (SOC) stock was dominantly affected by this type of degradation. On the other hand, SOC is...
Effects of forest fragmentation on assemblages of pollinators and floral visitors to male- and female-phase inflorescences of Astrocaryum mexicanum(Arecaceae) in a Mexican rain forest
fl oral visitors palm pollination species richness
2015/11/13
We examined the consequences of habitat fragmentation on the assemblage of floral visitors and pollinators
to male- and female-phase inflorescences of the understorey dominant palmAstroca...