优质北美鹅掌楸种源

北美鹅掌楸是优良的观赏兼用材树种。每到秋季，叶色金黄美丽，树体高大，城乡绿化的景观色彩价值很高，且未见到病虫害，目前已被北京、大连等4个城市确定为适宜栽植的优良乔木树种。同时，该树种也是优良的蜜源植物和优良纸种的配方木浆，用作装饰材有“轻、棉、细”的美称，因此极具推广价值。     

拟赤杨的栽培技术

拟赤杨是一种生长快，干形直，用途广的优良速生阔叶树种。通过对拟赤杨的采种、育苗、造林和天然林调查，了解和掌握了该树种的生态特征和生长规律，阐述了该树种的营林主要技术措施。。     

青钱柳的栽培技术

青钱柳是一种生长快，干形直，用途广的优良珍稀阔叶树种。通过对青钱柳的采种育苗、造林和天然林调查，了解和掌握了该树种的生态特征和生长规律，阐述了该树种的营林主要技术措施。     

香樟苗木快速培育技术

香樟（Cinnamum camphora Presl）常绿乔木，喜光，速生，枝繁叶茂，冠形优美，是典型的多用途珍贵树种，国家二级保护植物。其材质优良，有香气，纹理细密，美观，耐腐朽，防虫蛀，是家具、工艺美术品等优良用材。根、干、枝、叶可提取樟脑、樟油；种子可榨油，含油量达65％，可制作润滑油；叶含单宁，可提取栲胶，还能放养樟蚕，用途十分广泛。该树种为重庆主要乡土树种，树冠近球形，枝叶浓密青翠，作为优良的园林绿化树种，正被越来越多应用到行道树绿化及各种园林工程中。     

巴山松种子园建立和经营

巴山松(pinus henryi Mast)为我国特有树种，仅分布湖北西部，四川东北部和陕西南部的南郑、镇巴、宁强及镇平一带的大巴山区，而大面积的巴山松林仅见于南郑县黎坪林场。它生长迅速，耐瘠薄，病虫害少，是一种优良的造林树种。我们在该树种的优良种源区建立巴山松种子园。     

山杜英的栽培技术

对山杜工央进行了采种、育苗、移植培育绿化苗木，实践证明，山杜英是一种生长快，树态优美，抗病强的优良绿化树种。了解该树种的生态习性，提高育苗、造林技术是开发利用树种资源，提高林业经济效益的有效途径。     

优良园林绿化新树种--火焰花

介绍火焰花(Saraca asoca)的生物特性、播种育苗、栽培管理、园林观赏，该树种观赏价值高，适应性较强，病虫害少，容易管理，是适于南亚热带城镇和道路种植的优良园林绿化树种。     

银白杨嫁接育苗试验

银白杨是一个种子难于成熟，扦插育苗困难，根蘖苗繁多的优良树种，作者采用嫁接育苗的方法使该树种的繁殖取得了突破性的进展。     

闽粤栲大田育苗试验初报

粤栲是我省优良的常绿阔叶速生乡土树种，对该树种的育苗试验表明：闽粤栲每公顷产苗量可达42万株，育苗10个月后平均苗高可达45cm，地径0．55cm，为该树种苗木质量地方标准的建立提供了科学的依据。     

薄壳山核桃的引种栽培

薄壳山核桃果实营养丰富，是世界著名的干果之一。其木质质地坚固强韧，是优良的用材树种；由于其树姿优美，还可作为绿化树种。该树种于20世纪初引入我国，在本地生长、结果良好，表现出了较强的适应性，值得大面积推广栽培。     

新疆杨不同混交模式对天牛危害和林木生长的影响

为验证多树种合理配置抗御杨树天牛灾害的效果,在宁夏新华桥种苗场的试验林内,选取受光肩星天牛危害的3种配置模式的林分为样地,通过对新疆杨标准木做树干解析.比较3种配置模式中新疆杨的单株总生长量,结果除胸径外,树高和材积的总生长量均存在显著差异;单株材积总生长量大小顺序为新疆杨和复叶槭混交林＞新疆杨和合作杨混交林＞新疆杨纯林,即混交林中天牛对新疆杨危害不同程度地小于新疆杨纯林.比较3种模式林分在单位面积上的总材积生长量,结果为新疆杨和复叶槭混交林＞新疆杨纯林＞新疆杨和合作杨的混交林.同时考虑目标树种的单株材积生长量和该配置模式单位面积上的总材积生长量,新疆杨和复叶槭混交林是3种模式中最理想的.     

利用地径建立林木材积估测模型的探讨

通过实测铁杉、红桦和湖北花楸的地径、胸径、树高和材积，我们建立了根据林木地径估测树木材积的数学模型，具有较高的相关系数，可以应用于森林资源管理和森林生态系统研究。     

豫北斑竹笋用林改造技术

斑竹为豫北地区主要栽培竹种,曾经为当地经济发展作出了巨大贡献。随着传统手工业的衰落,竹材价格逐年走低,竹林从材用林向笋用林转变已是大势所趋。文章在总结多年实践经验的基础上,提出了通过封园清杂、林地垦复、水肥管理、结构调整、合理采笋等将斑竹林改造为笋用林的关键技术措施。实践证明,改造后的斑竹林生长良好,经济效益显著提高。该技术可在豫北地区推广应用,为豫北地区竹林可持续发展提供技术支撑。     

The impact of community-based forest management on timber treeregeneration in north-eastern Honduras,with specific reference tobig-leaf mahogany (Swietenia macrophylla)

Reduced-impact logging is used to minimise the negative effects of selective logging. However, it has been suggested that low-impact logging may create too little disturbance for the regeneration of the light-demanding timber tree species, hence compromising forest productivity. This study evaluates the impact of low-intensity, non-mechanised, certified community forest management on timber tree regeneration. Particular attention was paid to big-leaf mahogany (Swietenia macrophylla), which has a regeneration pattern linked with large-scale disturbances. Logging gaps were compared to natural treefall gaps of an unlogged forest. There were more species of the light-demanding timber trees, but fewer individuals of the shade-tolerant timber species in the certified forest logging gaps, compared to unlogged forest treefall gaps. Furthermore, significant differences were found in the environmental characteristics of the logging and natural treefall gaps, although these only partially explained the differences in timber regeneration. Mahogany was found in over half of the logged forest gaps, whilst being nearly absent in the natural treefall gaps. However, all mahoganies in the established logging gaps were seedling-sized, indicating that regeneration may be hampered due to competing vegetation. The results of the study suggest that low-impact forest management may, at least in the short term, favour light-demanding species over the shade-tolerant ones, similarly to conventional forest management.     

Exploring adaptation to climate change in the forests of central Nova Scotia, Canada

The threat of climate change is now recognized as an imminent issue at the forefront of the forest sector. Incorporating adaptation to climate change into forest management will be vital in the continual and sustainable provision of forest ecosystem services. The objective of this study is to investigate climate change adaptation in forest management using the landscape disturbance model LANDIS-II. The study area was comprised of 14,000 ha of forested watersheds in central Nova Scotia, Canada, managed by Halifax Water, the municipal water utility. Simulated climate change adaptation was directed towards three components of timber harvesting: the canopy-opening size of harvests, the age of harvested trees within a stand, and the species composition of harvested trees within a stand. These three adaptation treatments were simulated singly and in combination with each other in the modeling experiment. The timber supply was found to benefit from climate change in the absence of any adaptation treatment, though there was a loss of target tree species and old growth forest. In the age treatment, all trees in a harvested stand at or below the age of sexual maturity were exempt from harvesting. This was done to promote more-rapid succession to climax forest communities typical of the study area. It was the most effective in maintaining the timber supply, but least effective in promoting resistance to climate change at the prescribed harvest intensity. In the composition treatment, individual tree species were selected for harvest based on their response to climate change in previous research and on management values at Halifax Water to progressively facilitate forest transition under the altered climate. This proved the most effective treatment for maximizing forest age and old-growth area and for promoting stands composed of climatically suited target species. The size treatment was aimed towards building stand complexity and resilience to climate change, and was the most influential treatment on the response of timber supply, forest age, and forest composition to timber harvest when it was combined with other treatments. The combination of all three adaptation treatments yielded an adequate representation of target species and old forest without overly diminishing the timber supply, and was therefore the most effective in minimizing the trade-offs between management values and objectives. These findings support a diverse and multi-faceted approach to climate change adaptation.     

沙区主要造林树种节水灌溉制度的研究

在和田绿洲外缘新开发区 ,采用滴灌技术营造常规经济林、防护林树种 ,收集试验区基本气象资料 ,用彭曼公式估算和田地区 3～ 10月作物的蒸发蒸腾量 ,根据各树种生长期内的需水特性 ,计算耗水强度、灌水定额 ,确定各树种的灌溉周期 ,灌溉定额。借此来指导在干旱区采用先进滴灌设备节水造林工作。     

尖峰岭国家级自然保护区青皮林资源及其垂直分布特征

尖峰岭国家级自然保护区三分区的青皮林是目前海南岛保存最好的林分之一，其生态系统的原生性较强．组成种类繁多，林分结构合理，平均胸径为28．6cm，最大植株胸径达143．3cm，23个样方中有14个样方出现了胸径≥70cm的大乔木；林木蓄积量高达469．773m^3／hm^2，而青皮、细子龙、野生荔枝、盘壳栎等13个种的蓄积量占总蓄积量的45％，其余301个少见种或偶见种的蓄积量只占55％，反映了青皮是热带常绿季雨林生态系统关键种的现实。青皮与细子龙、野生荔枝等的最佳分布海拔在300m～650m之间，它们与向低海拔分布的白茶、翻白叶和向高海拔分布的大叶白颜、青兰、拟核果茶等一道组成了热带常绿季雨林的表征种类。     

我国南亚热带珍优乡土阔叶树种大径材人工林的培育

在我国南亚热带地区培育珍优阔叶树种大径材人工林,可以兼顾珍贵用材生产和生物多样性保护、生态效益最大化追求、森林生态系统稳定性维持,实现森林可持续经营.近20余年的研究和实践增进了人们对珍优乡土阔叶树种的了解,必须重新评价其林学特性和重要性.经营珍优乡土阔叶树种大径材人工林的关键技术环节在于:依据生境异质性和树种特性细致规划林地,使用良种壮苗,适时调控林分密度,运用多树种混交,通过抹芽修枝培育无节良材,实施择伐和林隙更新保证森林生态系统稳定.本文以红椎为例,对经营珍优乡土阔叶树种的经济效益进行了概算,并提出了珍优阔叶树种大径材培育的未来优先研究方向.     

川滇桤木的生境适应性、木材纸浆性能与林分生态效益分析

川滇桤木是一个生态经济型的纸浆原料林树种,适于在亚热带地区重点发展,或与桉树混交及作桉树林退化后的替代种植树种,以实现纸浆原料林的可持续发展。川滇桤木的生境适应性强、生长速度快,除干旱的阳坡不宜种植外,对各种立地环境都较适应,其人工林林木高和径的年均生长量都在1以上。川滇桤木木材的造纸性能良好,其木材密度为0.48 g/cm3,纤维长度1.19 mm,纤维长宽比91.47,综纤维素87.17%,苯醇抽出物2.56%,细浆得率43.6%,黑液残碱7.0 g/mL,撕裂指数8.2 mN.m2/g,抗张指数48.79 N.m/g,耐破指数3.31 kPa.m2/g。川滇桤木具有良好的生态功能,营造人工林后,林分生物多样性增加,林地的水湿条件得到改善,其人工林群落特征与亚热带常绿阔叶林一致,改良林地土壤的效果良好,能提高林地土壤的肥力。