青海省野生宿根花卉在园林中的应用

青海省地处青藏高原,各种自然条件的空间分异强烈,加上高原特有的热力作用和小气候作用,使得不同纬度、海拔高度、地形和生长环境上生长着不同的高原野生花卉,而如何发掘和利用这些野生花卉资源以适应城市发展建设的需求,则是一个迫切需要解决的问题。     

百花山野生花卉资源在园林中的开发与应用

为保护和合理开发利用北京百花山风景名胜区的野生花卉资源,对该区内的山地草甸进行了调查。调查结果表明：该区共有野生草本植物35科80属131种。其中大部分植物具有很高的观赏价值。按观赏季节的不同主要分为春季观花、夏季观花和夏秋观花3类。该区野生花卉按其在园林中不同的利用价值可分为花镜、花坛类以及地被花卉类。文章对该区野生花卉资源保护及利用进行了探讨。     

黑龙江省野生宿根花卉资源及园林应用

黑龙江省地处寒温带,野生宿根花卉资源丰富。本文着重从其观赏特性、园林用途、配置原则等方面进行了综述,并提出合理开发利用建议。     

百花山夏季观赏野生花卉资源在园林中的开发与应用

对百花山观赏植物资源进行了调查,重点分析了夏季观赏花卉,指出了该区野生花卉按其在园林中不同的利用价值可分为花镜、花坛类以及地被花卉类,对该区夏季观赏野生花卉资源保护及利用进行了探讨.     

野生花卉资源及其园林应用

通过对我国野生花卉资源调查状况及特点的概述,分析了目前野生花卉在园林中的几种重要应用类型,提出了今后野生花卉在生态旅游建设中应用的新思路,同时对野生花卉资源保护、开发提出了几点建议.     

三种宿根花卉引种及其园林应用

乌海市位于内蒙古自治区西部,属于半干旱半荒漠地带,生态脆弱,植被类型简单。市区三面被乌兰布和沙漠、库布齐沙漠、毛乌素沙地所包围,干旱少雨,风大沙多,气候条件极其恶劣。近些年,随着城市建设的快速发展,植物种植的种类和数量也越来越多,气候条件较前些年有所好转。但现在人     

15种秦岭宿根花卉在西安地区的引种栽培及园林应用评价

经过多年的观察、试验和应用,对表现优异的15种秦岭特有的宿根植物从原生环境、引种情况以及园林应用评价等几方面进行研究分析和技术总结,为秦岭特有观赏植物能早日应用于园林绿化建设中提供合理的科学依据。     

宿根花卉在包头地区园林中的应用

本文在多年引种研究的基础上,根据包头地区园林绿化中存在的问题及宿根花卉的特点,提出在包头地区可推广应用的宿根花卉,简述其观赏特性、生长习性及在园林绿化中的应用。     

宿根花卉在北京的园林应用

该文在多年引种栽培研究的基础上,提出北京地区可推广应用的宿根花卉种类,简述了其观赏特性和生态习性。并指出了宿根花卉在北京园林应用中尚存在的问题。     

浅谈宿根花卉在北票市园林中的应用

根据宿根花卉的生态习性和在园林中表现出的效果,以及北票市的自然环境和经济环境,证实宿根花卉在北票市的应用日益受到重视.     

野生花卉在景观设计中的选择与应用

文章在强调野生花卉植物在景观设计中具有重要应用价值的基础上,阐述其选择依据、配置原则以及应用形式,重点介绍江苏省有观赏价值的野生草本花卉的观赏特性、生态适应性和可供选择的园林用途,以期对该地区景观植物配植有一定的指导意义和参考价值。       

森林经营体系概论

林业两大体系建设和两个根本性转变要求构建科学的森林经营体系。采用以组织森林经营类型为核心的龄级法森林经营体系，优化森林经营决策，能有效地解决森林经营中存在的问题，合理配置林地资源，发挥森林资源三大效益。     

黄龙山林区野生动物资源开发利用的途径及设想

针对黄龙山林区野生动物资源分布广泛且种类繁多的比较优势，分析野生动物资源的现状，结合实施天保工程，调整产业结构，实施产业战略转移，以特种动物养殖为突破口，提出野生动物开发利用的途径及设想。     

小陇山林区野生草本花卉资源及综合利用

小陇山林区植物资源丰富，通过多年对该区野生草本花卉资源种类、分布的调查研究，发现本区综合利用价值较高的野生草本花卉植物有33科60属69种。对本区主要野生草本花卉资源的利用价值进行了简要介绍，并对其综合利用提出了建议。     

几种室内盆花无土栽培繁育技术

实践表明：仙客来、美叶光萼荷、袖珍椰子、巴西木等室内盆花无土栽培时，播种、育苗基质用蛭石、沙；扦插用蛭石、珍珠岩；出苗和生根后移栽基质用泥炭1＋蛭石1或泥炭1＋珍珠岩1＋沙1为宜，生长周期筛选的花卉通用型营养液浇灌生长良好。     

森林采伐与作业迹地森林景观

本文着重从森林景观角度出发,探讨了不同森林采伐模式对作业迹地森林景观的影响。在实地调查的基础上。采用定性定量相结合的方法对作业地的森林景观进行了评价。提出了一套评价标准。初步研究结果表明,楔形采伐为一种既维持生态景观又兼顾木材生产的采伐方式,且对森林景观具有较积极的影响。     

An improved algorithm for mapping burnt areas in the Mediterranean forest landscape of Morocco

The identification of burnt forests and their monitoring provide essential information for the suitable management and conservation of these ecosystems. This research focuses on the use of remote sensing with MODIS sensor data in a Mediterranean environment, precisely in the Rif region known for its high occurrence of forest fires and the largest burnt areas in Morocco. It mapped the burnt areas during the summer of 2016 using spectral indices from MODIS images, namely the Normalized Burn Ratio (NBR) and the Burnt Area Index for MODIS (BAIM). Two field surveys were used to calibrate spectral indices and validate the maps. First, a monotemporal analysis using a single pre-fire image determined the appropriate threshold of the spectral indices (BAIM and NBR) for burn detecting. Secondly, a multitemporal method was applied based on dBAIM and dNBR images which represented pre-fire and postfire differences of the BAIM and NBR images, respectively. The results show that separate use of monotemporal postfire and multitemporal methods produced an overestimation of the burnt areas. Finally, we propose a new algorithm combining both methods for burnt area mapping that we name Burnt Area Algorithm. MCD45A1 and MCD64A1 MODIS burnt area products were compared to the proposed algorithm. Validation of the estimated burnt areas using reference data of the Moroccan High Commission for Water, Forests and Fight against Desertification showed satisfactory results using the proposed algorithm, with a determination coefficient of 0.68 and a root mean square error of 44.0 ha.     

广州市白云区森林景观镶嵌结构的分形分析

利用分形理论建立了广州白云区森林景观镶嵌结构的回归模型。以森林景观各斑块类型的分维数和稳定性指数为依据分析了该区各种森林景观类型的复杂性和稳定性。探讨了影响该区森林景观镶嵌结构的成因。结果表明:白云区森林景观镶嵌结构具有分形特征,其分维数为1.044 3~1.146 1;稳定性指数为0.353 9~0.455 7。该结果定量地反映了白云区森林景观结构形态在人类活动控制下,形状比较规则,结构趋向简单化。     

Effects of forest landscape change and management on the range expansion of forest bird species in the Mediterranean region

In the western Mediterranean region of Catalonia (NE Spain), during the last 20 years of the 20th century, the range of many forest bird species has expanded. Our objective was to characterize the roles of (a) spatial population processes (related to dispersal), (b) changes in forest structure (due to forest maturation and management), and (c) landscape composition (resulting from afforestation and fires) in the range expansion of these bird species at the landscape scale (10 × 10 km). After correcting for the differences in sampling effort, colonizations appeared to be more likely near areas in which the species had been present in the 1980s. Patterns of the range expansion were also strongly associated with forest maturation, which seems to affect the spatial arrangement of birds at multiple scales. Changes in forest landscape composition due to afforestation and fires were minor determinants of range changes, and forest management did not seem to prevent range expansion at the spatial scale studied. Colonization events appeared to be driven primarily by landscape changes occurring in nearby localities rather than within the colonized locations themselves, presumably because of source–sink dynamics and connectivity patterns. Our results showed that in Catalonia, at a landscape scale, the impact of forest management on forest bird communities is much smaller than the impact of the widespread maturation of forests following a large-scale decline in traditional uses.     

浅谈木兰林区山野资源的保护与开发利用

木兰林区属冀北山区,环卫京津,林下蕴含丰富的山野资源。通过对山野资源现状的思考,指出木兰林管局山野资源存在提前采收,掠夺式经营、资源分散,资源利用率低,经济效益不高等几个问题。同时对木兰林区山野资源的保护与开发利用提出应全面调查、统一规划、合理开发,多方联动、区域治理,重新整合资源、提高科技创新能力,着力构筑技术创新平台、利用木兰林区纯天然的生态优势,全力打造品牌、更新观念,合理开发利用,保护野生果菜资源和加大野生果菜产品的研发力度。