FORESTAR：A decision—support system for multi—objective forest management in Northeast China

Past monoculture forestry in China has contributed to countrywide ecological disasters and economic difficulties in forestry regions. China‘s new forestry programs, Natural Forest Conservation Program and Returning Farmlands to Forests Program, provide opportunities for ecosystem management of mountain forests in China. A decision support system, FORE-STAR, has been developed for better managing and protecting natural forests in Changbai Mountain area. It uses GIS-based forest inventory data at a scale of forestry bureau. The first version contains two sub-modules: forest operation and forest res-toration. Under each sub-module, users can compare several decision options and make optimal choices. It can help field for-esters, forest managers, and policy makers make multi-objective and consistent decisions in planning forest management at hierarchical administrative scales.     

Research trends: Policy impact evaluation: Future contributions from economics

Economic research has become more empirical, and much of the shift has been due to the broad applications of impact evaluation (or IE) methods for measuring the potential effects of policies or programs on outcomes of interest. The objective of this article is to introduce the essential IE methodology and literature to the audience of this journal and discuss how we can take advantage of these research developments to improve the quality of our own work and subsequent publications. Following an overview of the core IE concepts and methods, we will give an overview of the recent uses of these methods to address forest policy issues and outline the basic steps of sampling and data generation involved in an IE study.     

拼花地板市场展望

2012年10月17日,欧洲拼花地板行业联合会(European Federation of the ParquetIndustry)在布鲁塞尔开会讨论欧洲拼花地板市场的形势和最近指标。各与会国代表提供的观测数据和预测进一步印证了4月份的初步观点:对欧洲拼花地板生产商而言,2012年充满挑战。正如大家数月甚至几年来所见证的,     

武广高铁:绿色在行动

乘坐武广高铁的你,在享受舒适、方便和快捷的同时,是不是希望能在旅途困顿之余,看到一路的花红柳绿、宜人美景?据全球媒体——"网络灵锐"新近在全球范围内进行的一项调研显示,中国民众采取更加绿色、环保的生活方式的     

Planted forests: poplars

Poplars (Populus spp.) have been planted in Europe and Asia since very early times. Known in the Near East as the blessed tree, poplars have been the primary timber producer in regions lacking natural forests in the northern hemisphere. Now, though, we are seeing poplar plantations becoming part of the forest resources even in the abundantly forested Pacific Northwest. Though still a minor contributor to the world's timber supply, the area of land planted to poplars is, nevertheless, increasing rapidly, particularly in China, South Korea, and the United States. The 1992 report from the International Poplar Commission listed nineteen countries with at least 10,000 ha of planted poplars and seven with more than 100,000 ha. Much of the success of poplar plantations results from the breeding of fast-growing and disease-resistant poplar hybrids. Accordingly, at least eleven countries support poplar breeding programs. Uses of poplar wood range from peeled poles for rafters and other elements of construction in agrarian economies to the manufacture of paper, plywood, oriented strand board, and engineered lumber in industrial nations. Interest has also developed in poplar plantations as a renewable source of energy.     

基于Kano模型的森林公园环境教育需求分析研究——以开封市康平河森林公园为例

本研究以开封市康平河森林公园为例，分析游客环境教育需求，为城市公园环境教育功能的实现提供参考。通过问卷调查、Kano模型与Better-Worse系数法对公园进行需求类型调查、重要程度排序与人群差异化分析。研究表明在五类一级需求中需求重要度依次为设施需求、工作人员需求、教学形式需求、费用需求、活动内容需求，在游客需求差异化分析中园内设施与活动内容需求差异最明显。得出以下结论：应对公园设施进行合理规划；增设咨询服务点及解说设施；设置多种形式的环境教育活动；增设环境教育相关人员岗位并做好培训；注重差异化设计。     

漩门湾这片湿地

在浙江东南黄金海岸线上,有一个名叫玉环的海岛县,隶属浙江省台州市.把玉环所属的海域和大小岛屿加在一起,面积2300平方公里,而真正的陆地面积却只有378平方公里,相当于饿罗斯文豪列夫·托尔斯泰的私人庄园.据<太平寰宇记>载,玉环的县名,源自海岛的奇观:"晨雾绕岛,形状如环;上有流水,洁白如玉",多么浪漫,多么富有诗情画意!     

山西杉苞蚧的研究(同翅目:蚧总科:蚧科)

山西杉苞蚧PhysokermesshanxiensisTang是一种新发现的园林害虫。在山西中部严重危害白PiceameyeriRehd .etWils.为害轻者树势衰弱 ,重者整株枯死。本文首次描述和图示了各幼虫期虫态和雄成虫的形态特征 ,重描了雌成虫的形态。同时也观察了其生物学特性 ,结果表明 :该虫在山西中部 1年发生 1代 ,以2龄若虫在 1年生枝条和针叶上越冬 ;取食为害高峰在 4月上旬至 5月中旬 ;行两性生殖 ,每雌产卵 1 5～ 1 1 4 3粒 ,平均 6 0 2 3粒 ;天敌主要有异色瓢虫Harmoniaoxyridis(Pallas)的十八斑变型和二星瓢虫Adaliabipunctata(Linnaeus)。此外 ,本文还提出了有效的防治措施