金佛山方竹次生林类型与经营措施

金佛山方竹是我国较有特色的笋用竹种，笔者在其中心分布区的大量样地调查基础上，用平方和距离法将金佛山方竹次生林划分成10个类型，并分析了各种类型的特征，提出了相应的经营措施。     

木麻黄引种初报

经过5a的引种试验,木麻黄不仅能生长,而且能开花,年高生长46～170cm,胸径年生长量1.8～12.0mm,地径年平均生长量5.1～20.5mm。与乡土树种马尾松相比,木麻黄的平均高、胸径生长量是马尾松的2倍,开花株率23%。     

砼输送泵在福胜大厦高层建筑上的应用

混凝土泵是一种能一次连续完成混凝土水平和垂直运输的施工设备。以福胜大厦高层建筑中采用混凝土输送泵进行混凝土浇筑为实例，论述了在施工中如何正确使用输送泵。针对施工中出现的堵泵问题，从混凝土和机械方面进行原因分析，并提出处理办法。     

浅谈贵州省世行贷款贫困地区林业发展项目建设

世行货款“贫困地区林业发展项目”是世界银行支持我国中西部地区经济发展的又一个贷款项目。通过对贵州省15个项目县（市）的调查研究，总结分析项目实施中的经验和存在的问题，提出对策建议，供我国中西部12个省（区）在开展贫困地区林业发展项目建设中参考。     

β—蒎烯合成柑菁醛初报

本文报道了从β—蒎烯合成柑菁醛在实验室规模下已获得成功。合成步骤包括β—蒎烯热异构化生成香叶烯和香叶烯与丙烯醛反应获得柑菁醛。 在管式炉中,加热β—蒎烯蒸汽,当温度为650～750℃、接触时间0.06～0.12秒时,有90％的β—蒎烯转化成香叶烯和苧烯等化合物。香叶烯的产率大于60％。 香叶烯与丙烯醛的狄耳斯—阿尔德反应于烧瓶中进行,当温度在130～160℃,经3～6小时,反应即可完成。柑菁醛的产率达70％。     

整地施肥对I-69杨人工林生长效应的研究

在淮北平原宿县,通过大穴整地、施肥改良砂姜黑土、营造Ⅰ-69杨的五年试验证明,大穴整地当年效应明显(径、高增长19.8%、91.8%);头二年肥效不显;第三年起N肥、有机肥、N×有机肥交互作用效应极显著(材积增加77%),施P+K肥效应较差,N+K肥和N+P肥经济效益较高,投入/产出为1/6.22和1/3.78;材积增加60%和58%。整地加施肥综合效益明显,有效施肥占综合效益85.1%～88.8%。     

肉桂油的成分研究

肉桂油在世界上享有盛名,产量占世界总产量的80％。作者用GC/MS联用仪对我国广东、广西、福建三省(区)的肉桂叶油和肉桂皮油进行了定性与定量分析。鉴定出广东肉桂叶油13个组分;广东肉桂皮油11个组分;广西肉桂叶油14个组分;广西肉桂皮油12个组分;福建肉桂叶油12个组分,结果表明五种肉桂油的化学组成基本相同,均以反式肉桂醛为主要成分,其含量分别为81.0,84.1,54.6,73.2和73.6％。     

陕北及毗邻地区锦鸡儿属植物资源与开发利用研究

锦鸡儿属植物是干旱，半干旱地地区优良的水保，固沙，饲料等多用途灌木树种，对陕北及吡邻地区这一特殊地域的该属植物资源五开发利用研究进行了报道，并确认本区有该属植物共９种。     

晋东南石灰岩山地油松人工林立地类型划分及评价

利用１１８块野外标准地资料，对晋东南石灰岩山地油松人工林进行了立地类型划分及生长评价。经分析坡向、海拔、土层厚度为影响林木生长的主导立地因子，３个主导立地因子共构成２４个组合立地，每个组合立地可视为一个立地类型，用最优分割法将２４个立地类型划分为４个立地类型组。在优势木与平均木树高相关分析的基础上，以椽材林木为标准。对４个立地类型组进行了林木生长评价与预测。     

Seedling response of two trembling aspen (Populus tremuloides) families to infection by Hypoxylon mammatum

Open-pollinated progenies from two trembling aspen (Populus tremuloides) families with a 30-year field history of 91% (putatively susceptible, PS) and 45% (putatively resistant, PR) mortality, respectively, caused by Hypoxylon mammatum, were grown in a greenhouse for 3 and 9 months. Seedlings were inoculated with two isolates of H. mammatum, representing high and low aggressiveness, through a stem wound. Beginning 4 days after inoculation, host responses were examined on 312 seedlings per family for a period of 5 weeks on 3- and 9-month-old seedlings. Significant differences in host responses were observed between the two isolates, with the more aggressive isolate allowing less callus formation, causing more tissue necrosis and producing longer cankers than the less aggressive isolate on both aspen families. Between-family difference was much greater than within-family difference for tissue necrosis, callus formation and canker length for both seedling ages. When the 3-month-old seedlings were challenged with H. mammatum, the PR family showed greater tissue necrosis, longer cankers, and less callus formation than the PS family. However, when the more lignifìed 9-month-old seedlings of the same families were inoculated, the PR seedlings had much less tissue necrosis, shorter cankers, more callus formation and less seedling mortality than the PS family. The results indicate that artificial inoculation of seedlings in a greenhouse can differentiate two aspen families at the seedling stage, but their correlation to field performance is highly dependent upon the seedling age. Host responses of older seedlings may be a better indicator of field performance.