进口数量再创新高 价格行情屡升不止——2007年我国进口木材状况简析以及2008年进口木材趋势预测

近10年来，我国每年从国外进口的木材平均都呈30％左右的速度递增。然而最近两年来，由于国际木材资源的日益吃紧，国际大环保呼声深入人心，各木材出口国纷纷调整本国木材出口政策，以及我国政府也开始把发展速生丰产林作为解决木材资源匮乏的重要手段，我国进口木材的迅速增升势头出现较为平稳、缓和的递增趋势。从今年的进口木材的几个主要品种来看，总的状况概括起来就是：进口数量再创新高，价格行情屡升不止。     

油松毛虫体内酶系对油松诱导抗性的响应机制

To explore counter-defense response mechanism of pine caterpillar ( Dendrolinus punctatus tabulaeformis Tsai et Liu) to the induced insect-resistance of Chinese pine (Pinus tabulaeformis),the Chinese p...     

马尾松对松材线虫病抗病性差异的研究进展

松材线虫病是松树的一种毁灭性病害,不同种源的马尾松的抗病性存在差异.就马尾松对松材线虫病的抗病性差异研究进展进行了综述.目前,马尾松抗病性的研究主要有以下5个方面:①不同树龄与抗病性之间的关系;②不同地理种源马尾松对松材线虫病抗病性的差异;③与种源抗病性有关的主要成分;④马尾松的诱导抗病性;⑤马尾松抗病育种.马尾松的抗病性与多种因素有关系,通常具有抗性的马尾松一般生长状况较好;马尾松的抗病物质很复杂,到目前为止,人们已经发现了马尾松的一些抗病物质的种类,并对这些物质的结构进行了研究,但对这些抗性物质的产生和马尾松抗病机理还有待于进一步的研究.     

浙江省为害松树的叶蜂类昆虫

1996-1999年在余杭长乐林场对马尾松吉松叶蜂和浙江黑松叶蜂调查研究，结合历年积累的为害松树叶蜂标本和资料，报导10种马尾松叶蜂害虫，总结了它们共同的生物学特性、发生特点、天敌和防治方法，提出了防治叶蜂害虫的意见：对爆发型的叶蜂害虫，要从害虫为害虫的经济损失和防治费用投入以及化学防治对环境的污染、天敌和伤害，应综合全面评价，提出经济可行措施。     

松树蛀干类害虫引诱剂引诱松褐天牛试验

报道采用自行配制的松树蛀干害虫引诱剂引诱松墨天牛的试验结果,对引诱剂的诱捕效能进行了分析。研究结果表明该诱捕剂单日最大诱捕量为5头/单个诱捕器。雌雄比为1:1.02,所诱捕到天牛雌虫60%-80%腹内有卵,藏卵数各地统计,8-40粒不等。引诱剂引诱距离的测定结果,引诱剂在离松林缘150-200m距离内均能引诱到松褐天牛。诱集的虫种中有两种天牛,其中松褐天牛占总虫量35.7%,短角幽天牛占11.6%。     

2013年住宅家具市场前景

由于美国住房市场和整体经济的适度改善,预计2012年下半年住宅木质家具的销售将增加。     

直线异型截面装饰线材的腻子涂装工艺

随着人们生活水平的不断提高和环保意识的加强,环保型室内木制装饰材料的用量越来越大,由于截面造型的千变万化而形成了多个品种、多个系列,而在这众多的品种和系列中,直线异型截面装饰线材的使用范围最广。从材质上分,木质线型材料可分为高档硬质木材和速生木材两种,由于高档木材资源在逐年减少,因此许多制造商将目光聚集在速生木材上,但使用速生材时会遇到诸如涂饰方面的问题,笔者就此进行探讨。     

The Pine Shoot Beetle Tomicus piniperda as a Vector of Blue Stain Fungi to Windblown Pine

After the great gale of 1987, the role of the pine shoot beetle,Tomicus piniperda, as a vector of blue stain fungi to windblownpine in southern England was examined by macerating adult beetlesand culturing the macerate on various agar media. Isolationswere also made from pine tissue associated with beetle galleriesand tunnels. Using data from between three and nine sites, it was found that17 per cent of the overwintered adult beetles were carryingfast-growing Leptographium spp. as they began to construct breedinggalleries in spring 1988. More than half the new generationof adult beetles were contaminated with these fungi when theyemerged in June-July 1988, but this proportion dropped as thelife cycle of shoot-feeding and overwintering progressed. Itaveraged 26 per cent at the time of brood gallery constructionin spring 1989. Isolations made from pine tissue around the galleries also showedchanges in the frequency of blue stain fungi. Of early broodgalleries 25 per cent yielded Leptographium, while the figurefor late galleries was 51 per cent. These results were consistentwith the direct introduction of Leptographium by the parentbeetles into some galleries, and the subsequent rapid hyphalgrowth of the fungus within the tree to colonize tissue adjacentto other galleries. The principal species identified was L. wingfieldii. However,L. lundbergii, L. huntii, L. procerum and an unidentified Leptographiumspecies were occasionally recorded, both on the beetles andin the trees. Graphium species were quite common also. In addition,the black yeasts, Hormonema dematioides and Aureobasidium pullulans,were frequently present, particularly in the pine shoot samples.     

应用解释结构模型分析松林系统对松材线虫干扰的响应

选用解释结构模型(ISM)分析松林生态系统对松材线虫干扰如何作出响应.结果表明:影响松林生态系统对松材线虫干扰做出响应的系统是一个5级的多级递阶系统,响应结果表现为抵御性和恢复性.群落中优势树种分布格局和松树的生物生态学特性是影响松林生态系统的抵御性的最大因素,受害木伐除和其他措施也通过影响松墨天牛的危害程度和物种分布格局而间接影响到抵御性.对于恢复性而言,除受土壤因子、水文、周围种源和次优或共优树种的生物学特性等直接影响外,气象因子也会直接或间接影响恢复性.海拔、坡度、坡向等地形因子和地理位置的差异和防治水平的提高也影响了松林生态系统对松材线虫干扰作出响应.