松材线虫病疫木安全利用新途径

该文在实地调查的基础上研究了利用松材线虫病疫木种植茯芩并杀死其中的松材线虫、松褐天牛达到安全利用的方法。研究表明:疫木种植茯苓第63天,样木中的松材线虫可全部死亡;第77天松褐天牛可全部死亡,种植240 d后,茯苓可采收,每立方米疫木可收益约1 100元。对利用疫木种植茯苓在种植技术、时间及安全性方面进行了可行性分析,并对经济效益和对生态环境的影响进行了评估。     

新型星形下锯法第一道工序加工过程的数学描述

新型星形下锯专利技术是由瑞典皇家技术学院木材技术和加工研究院Martin Winklund教授发明的，这种新型的下锯方法改变了人工林小径木的利方式。用这种方法生产的人工小径的大多数的纹理是径切的，其下锯有方向垂直于木材的生长办,训主要讨论了星形下锯法第一道工序的数学描述方法，推导出出了星形下锯法第一道工序生产的两块平头毛边板的精确材积公式，它为木材的合理利用提供了理论依据，依靠这些理论，今后可设计一个更简单实用的数据系统用于星形下锯系统，而且将会使得这些数控系统更适合于小径木的加工。     

Suspected wood poisoning caused by Simarouba amara (marupá/caixeta) shavings in two dogs with erosive stomatitis and dermatitis

Two male Labrador retrievers developed bleeding erosions/ulcerations involving the oral mucosa, mucocutaneous junctions of the lips, nose, prepuce and anus, ulcerated nodules on the chin, and crusting lesions on the elbows, hocks and scrotum. One of the dogs was anorexic and depressed, had haematological abnormalities consistent with damage to the liver and signs of neurological disease. As these dogs had recently been exposed to bedding containing Simarouba amara shavings and because of the striking similarities of clinical signs to those described for horses, a probable diagnosis of wood poisoning was made. This assumption was supported by the clinical course as healing of skin lesions occurred when the dogs were no longer exposed to the bedding.     

Ecology of soil springtails (Collembola, Insecta) from pine woods and Rhododendron shrublands in the Central and Eastern Pyrenees (North Spain)

The collembological composition of samples from the Central and Western Pyrenees (Northern Spain) was studied. Soils from two biotopes (pine forest and Rhododendron shrub) were studied in Nuria and Vallibierna, using different diversity indices and multivariate analyses. Ten species were found that were endemic to the Iberian Peninsula. Three of these are exclusive to the Pyrenees: Ceratophysella elegans, Hypogastrura dasiensis and Protachorutes pyrenaeus. The greatest diversity was observed in the soils of Rhododendron, above all at Nuria. Collembola were most poorly represented in the pine forest of Vallibierna, where the endemic Hypogastrura meridionalis was the dominant species. Multivariate analyses indicated that the latter species characterizes this pine forest and separates it from all other biotopes studied. The evenness (E) was most pronounced in Nuria, where Folsomia manolachei was the characteristic species.     

色木径向、弦向、非标准向压缩木的主要力学性能

对色木径向、弦向、非标准向压缩木的力学性能测试结果表明:3个方向压缩后的压缩木,顺纹抗压强度、抗弯强度、冲击韧性这3个性能指标互有高低,并不是径向压缩木的所有力学强度都比弦向压缩木的高,对此作出了分析讨论.     

细叶桉和赤桉种源间材性变异研究

对海南岛乐东尖峰岭和琼海上甬的８年生细叶桉和赤桉共１５个种源（含刚果１２号桉）的木材进行了基本密度、纤维长度和宽度测定及分析。结果表明,两树种的基本密度及纤维长度在种源间均表现出显著差异。纤维宽度差异较小,变异大小排序：木材纤维长度〉基本密度〉纤维宽度。赤桉的基本密度和纤维长度值较细叶桉更易受环境影响。不同种源的树皮厚度差异显著。不同方位间的树皮厚度有差异,北向最厚。种源间不同取样等分析纤维长度影     

氢氧化钠预处理对木材漂白促进作用的研究

用ＮａＯＨ的稀溶液处理泡桐木材,观察桐木渗透性、木材颜色的变化不碱液对泡桐木材漂泊白效果的促进作用进行了研究。结果表明ＮａＯＨ稀溶液对木材颜色没有明显损害作用,能显著提高桐木的渗透性,促进木材漂白效果。泡桐木材经过２ｄ的０．３％ＮａＯＨ稀溶液预处理,再经２％的硫代硫酸钠漂白处理３ｄ,半年老化后测色,桐木表面和内部的白有度比未处理材显著提高,色差显著降低。     

杉木阴沉木的特性

杉木阴沉木的出油率高于现代杉木,其精油检出４２种化合物。与现代杉木的具缘纹孔类型一样,都属于南洋杉Ｂ型,其木块与精油的抗白蚁性,强于现代杉木。杉木阴沉木基部边材耐腐性属耐腐等级、中部边材属稍耐腐等级,对白腐菌耐腐性好,均属耐腐等级,其抗性强于现代杉木。     

红松成过熟林伐区调查设计中资源误差的分析

天然红松成过熟林伐区设计与实际商品出材量存在着误差,一元立木材积表超过２０．６３５,红松误差为１５．６８％。实际超采伐量的设计资源消耗质量大２５％－５０％。     

我国木材的节约与代用问题

在森林资源严重不足,急需保护的背景下,木材代用受到新的关注。对我国社会产品材料结构的落后和木材加工利用中的严重浪费进行分析,认为应庄大力发展人工用材林的同时强调木材节约,而笼统强凋木材代用,在重要的利用方向上排除木材利用,提倡以不可再生材料代替木材是不可取的。