2011年我国林产品进出口实现开门红

2011年我国林产品进出口实现开门红,木材进口和人造板及木制家具等出口有明显增长。一、今年我国原木、锯材、刨花板和木质家具进口大幅度增长随着国民经济的发展,市场对各种木制品需求量不断增大,加上各种林产品出口大幅度增长,使木材加工业的木材消费量增大,带动原材料的进口。     

3月份北美材在日本市场的动态

随着云杉-松木-冷杉(SPF)锯材的价格和供应越来越稳定,其需求逐步扩大。据业内人士说:"北美锯材产品供应的增长是惊人的。去年10—12月期间的实际供应达到713万m~3,大大超过了预计的65万m~3。实际需求是73万m~3,我认为这是云杉松木-冷杉(SPF)规格锯材逐渐开始替代俄罗斯锯材产品用于传统木结构房屋的结果。"主要预制工厂的订单良好,中等和小型工厂工作量的下降是显而易见     

反倾销税延伸到欧盟从中国进口的奥古曼(Okoume)胶合板

欧盟理事会(Council ofthe EuropeanUnion)已决定对从中国进口的奥古曼(okoume)胶合板保留反倾销税。这一决定发布在2011年1月31日的欧洲委员会实施条例(European Council ImplementingRegulation)No82/2011上,这意味着2004年首次施加的税将在下一个5年继续有效。该产品在欧盟用于各种最终用途,包括细木工制品(木板、挡板、外部地基和栏杆及河边护壁板)和更多装饰用途(包括门、家具及车辆和游艇的镶板)。根据欧盟(EU)法规的条款,5年     

竹产业现代化生态经营的理念与对策

运用生态经济学的相关原理对竹产业的现代化生态经营理念进行了论述,结合我国竹产业生态化经营面临的问题,提出了竹产业现代化生态经营的相关措施。     

海南生态公益林生态系统服务功能价值评估报告

阐述海南森林资源概况,以海南公益林为对象评估森林的服务功能和生态经济价值,从涵养水源、保育土壤、固碳释氧、积累营养物质、净化大气环境、森林保护、保护生物多样性、森林游憩等8项服务功能进行评估,得出森林生态系统服务功能的总价值。通过评估发现8项服务功能的价值巨大,以此来加深人们对生态环境的保护和重视。     

浅谈住宅水暖工程渗漏原因和防治措施

论述了住宅水暖工程渗漏的原因和防治措施,对从事住宅施工安装和管理工作者提供了借鉴经验。     

“3S”技术集成及其应用

本文介绍了"3S"技术集成的定义、理论与关键技术,列举了其在林业、城市规划、水土保持及其他领域上的应用实例,指出了其应用的特点及存在的问题,并对其应用前景做了探讨。     

Small-angle X-ray scattering study on nanostructural changes with water content in red pine,American pine,and white ash

Wood is a highly sophisticated and multihierarchical material. The nanoscale structures in natural cell walls of red pine, American pine, and white ash specimens were investigated using the small-angle X-ray scattering (SAXS) technique. A tangent-by-tangent method was used to analyze the SAXS data. The results demonstrate that the multihierarchical scatterers in the three specimens can be divided into two dominant components, i.e., a sharp component and a wide component. The sharp component mainly corresponds to the contribution of cellulose microfibrils, and its size is almost unaffected by the water content. However, the wide component includes voids or microcracks and cellulose microfibril aggregates; its size changes, reflecting swelling and water accumulation in the voids or microcracks. Because of the different morphological features of the cell walls, softwood (red pine and American pine) displays different tendencies from hardwood (white ash) in terms of changes in the wide component with water content: the average scatterer size of the wide component has an incremental tendency with the water content in softwood, but it has a descending tendency in hardwood. Fractal analysis further revealed that in white ash the surface of scatterers is coarser and the scatterers form more compact nanostructures than in the two pine woods. All this nanostructural information can be used to explain well the difference of swelling behaviors between the two pines and the white ash.     

Fungal endophytes associated with Sonneratia (Sonneratiaceae) mangrove plants on the south coast of China

The aim of this study was to describe endophytic fungal communities residing in five mangrove species (Sonneratia caseolaris, Sonneratia hainanensis, Sonneratia ovata, Sonneratia Paracaseolaris, Sonneratia apetala) collected at the south coast of China. The colonization frequency (CF) of endophytes in roots, stems and leaves was measured and the structures of endophytic communities were investigated, using endophytic fungal diversity indices and similarity coefficients. We found high biodiversity and tissue specificity of endophytic fungi. A total of 391 fungal isolates were identified using morphological and molecular methods. We recovered a total of 39 distinct endophytic species, of which Cytospora, Diaporthe, Fusarium, Glomerella, Mycosphaerella, Phoma, Phomopsis and Stemphylium were the dominant fungal taxa. Most recovered species were found on more than one host species but the dominant species differed according to host and tissue type.     

大学校园景观环境意象设计探析——以福建农林大学为例

文章从空间构成的角度,从校园道路、校园景观节点、区域和校园标志物四个方面分析了福建农林大学校园景观意象,通过对此校园景观的分析评价,肯定优点,发现不足,希望从景观意象设计的角度对大学校园景观建设提供一定的参考。