搜索结果: 76-90 共查到“知识库 森林保护学”相关记录553条 . 查询时间(2.915 秒)
为了更好地保护林下植物资源,以塞罕坝国家级自然保护区内的5种森林类型为研究对象,运用丰富度、重要值、Simpson指数、均匀度指数等对其木本植物和草本植物物种多样性进行研究。结果表明:在研究区阔叶林的物种丰富度(53±7.000)高于针叶林(34±7.071)。草本植物Simpson和Shannon-Wiener指数在蒙古栎林中最高、白杄林中最低,分别为0.88、2.58及0.62、1.41;木本...
Soil fertility and productivity estimation of Pinus pinaster Aiton reforestations in Central and Northeast Chalcidice in Northern Greece
Degraded ecosystems conifer native vegetation accumulation of nutrients forest floor mineral soil
2018/3/6
Maritime pine (Pinus pinaster Aiton) is a notable fast-growing conifer, native to the Western Mediterranean Basin,
which is considered suitable for reforestations. This tree species was artificially ...
Efficiency of sector sampling for estimating juniper forest attributes vs. fixed area plot
accuracy crown cover density precision plot shape
2018/3/6
Juniper forests grow in mountain areas and many difficulties are encountered in their sampling. Sector sampling as
an unbiased and cost-effective method was tested for the sampling of a 12.5-ha junip...
The influence of evaporated pheromone upon the trapping of the spruce bark beetle – Ips typographus (L.) (Coleoptera: Curculionidae: Scolytinae) – Short communication
pheromone trap pheromone dispenser increased efficacy forest protection
2017/4/6
This article examines the relative efficacy of releasing a larger pheromone plume volume and the relative efficacy of the number of pheromone dispensers within baited traps in trapping the spruce bark...
中国林学会森林与草原防火专业委员会
中国林学会 森林与草原防火专业委员会 森林防火 草原防火
2022/6/6
中国林学会森林防火专业委员会由森林防火科学技术工作者、森林防火专业工作者及森林消防产品生产企业等专业人士自愿组成的学术性、科普性、行业性、公益性、非盈利性的社会团体,是党和政府联系广大森林防火工作者的桥梁和纽带,是国家发展森林防火科技事业的重要社会力量。
中国林学会森林病理分会
中国林学会 森林病理分会 森林病理学
2022/6/6
中国林学会森林昆虫分会
中国林学会 森林昆虫分会 森林昆虫学
2022/6/6
1984年3月8日,经中国林学会在京扩大常务理事会讨论通过,同意成立中国林学会森林昆虫分会专业委员会并于1985年10月20~27日在甘肃兰州召开森林昆虫专业委员会成立暨森林昆虫综合防治学术讨论会,由萧刚柔任首届主任委员,张执中、彭建文、邱守思任副主任委员,陈昌洁任秘书长。分会原挂靠单位为中国林业科学研究院森林保护研究所,根据《中国林科院改革与发展总体方案》,1998年5月4日与森林生态环境研究所...
Operator's physical workload in simulated logging and timber bucking by harvester
forest harvesting biofeedback ergonomics
2016/6/3
The aim is to conduct experimental measurements and analyses of physical and mental workload of harvester operators. Among other things, monitoring and analyses of work conditions and workload help re...
《梁希与中国近现代林业发展研究》
梁希 中国 近现代林业发展
2017/5/15
南京农业大学人文学院胡文亮主编的《梁希与中国近现代林业发展研究》于2016年2月由江苏人民出版社出版。以梁希和中国近现代林业发展为题进行研究,不仅可以很好地认识中国近现代林业科技产生的社会背景和发展的历史轨迹,对了解我国现代林业政策的变迁和未来的发展也有重要学术价值和现实意义。此书出版适逢其时。今天,中国人民对生态概念的深刻认识,对保护大森林就是保护生态系统安全,就是保护可贵的水资源的深刻认识,对...
杨树炭疽病菌对多菌灵及3种DMIs杀菌剂的敏感性
杨树炭疽病 胶孢炭疽菌 炭疽菌 多菌灵 C-14α-脱甲基酶抑制剂(DMIs)
2016/11/9
采用菌丝生长速率法,测定了可引起杨树炭疽病的59株胶孢炭疽菌和4株炭疽菌对多菌灵、苯醚甲环唑、戊唑醇和三唑酮4种杀菌剂的敏感性。结果表明:59株胶孢炭疽菌对多菌灵、苯醚甲环唑、戊唑醇和三唑酮的EC50值范围分别在0.037 1~0.130 1、0.102 5~1.680、0.069 1~1.917及3.053~38.59 μg/mL之间,平均EC50值分别为(0.066 4±0.013 1)、(0...
红外相机技术在北京雾灵山自然保护区兽类资源调查中的应用
红外相机 北京市雾灵山 相对丰富度 兽类G-F指数
2016/9/5
为了调查北京市雾灵山自然保护区兽类资源情况,自2013年7月至2014年5月,在雾灵山32个位点处布放红外相机进行系统调查,累积相机工作日3630天,共拍摄到兽类有效照片494张,鉴定出10种动物,包括:狍(Capreolus capreolus)、斑羚(Nemorhaedus goral)、猪獾(Arctonyx collaris)、岩松鼠(Sciurotamias davidianus)、野猪...
Comparison of two Coniochaeta species (C. ligniaria and C. malacotricha) with a new pathogen of black pine needles ?Sordaria macrospora
Ascomycota morphological characteristics phylogenetic analysis
2016/2/22
A new pathogen, Sordaria macrospora, isolated from damaged needles of black pine (Pinus nigra) causes discolouration, brown spots, blight symptoms, and necroses spoiling aesthetic value. Two species, ...
Averting biodiversity collapse in tropical forest protected areas
biodiversity collapse protected areas
2015/11/13
The rapid disruption of tropical forests probably imperils global biodiversity more than any other contemporary phenomenon1–3. With
deforestation advancing quickly, protected areas are increasingly
...
Root system development in naturally regenerated Douglas-fir saplings as influenced by canopy closure and crowding
natural regeneration competition shading physical tree stability
2015/9/15
Documented information on the growth dynamics and related silvicultural manipulation of naturally
regenerat ed Douglas-fir beneath a canopy shelter is scarce. We hypothesized that long regeneration ...
MONITORING TROPICAL FOREST FROM SPACE: THE PRODES DIGITAL PROJECT
Terrestrial Monitoring Land Use Change Detection Segmentation Classification Forestry GIS
2015/7/29
This paper presents the results of a new methodological approach to identify and to estimate deforested areas. The work refers to the
PRODES DIGITAL PROJECT, which develops an automatic procedure to...