荔枝高压苗繁殖技术研究

为提高荔枝高压苗牛根率、成苗率和定植成活率，课题组１９９３至１９９４年在新平县腰街、夏洒白糯格和者新街等地，分别从ＡＢＴ生根粉的应用、母树年龄、母树光照条件和操作技术等方面进行了荔枝高压苗繁殖技术的试验研究。研究结果表明：应用１０００ｐｐｍＡＢＴ１号生根粉处理环剥口能明显缩短压苗的生根时间，提高生根率；进行高压苗繁殖应选用幼龄母树的向阳生枝条和采用效果良好的生根基质，把握好环剥、包扎等操作技术。     

Electrophysiological and Behavioral Responses of Adult Anoplophom glabripennis (Motschulsky) to Volatile Components of Host-Plant

Electrophysiological and behavioral responses of adult A. glabripennis (Motsch.) to volatiles from ashleaf maple (Acer negundo L.) were investigated to identify semiochemicals involved in host location. Measurable electroantennogram (BAG) responses were elicited to all compounds tested, the most effective antennal stimulants were trans-2-hexen-1-al,decyl aldehyde and trans-2-hexenl-ol.These profiles were similar between males and females. In Y-tube olfactometer bioassays, above three compounds with certain concentration, trans-2-hexen-l-al (1%), trans-2-hexen-l-ol (1%) and decyl aldehyde (10%), were significantly attractive to the adults in laboratory. The results show that either BAG or olfactory responding to a particular volatile compound are markedly influenced by the concentration.     

湖北乔灌复层防火林带模式研究

通过对湖北乔灌复层防火林带的研究表明:1、乔灌复层防火林带中乔、灌不同树种对土壤、气候等环境条件的要求相同或近似,灌木树种要有一定的耐阴能力,防火树种以乡土树种为主。2、防火林带内树种的基本配置方式有凸形配置和凹形配置2种,二者各有优势,在实际应用中,应根据具体情况综合运用,以提高林带防火能力。3、林带走向应与防火季节主风向垂直,在湖北绝大多数林带的走向以东西向为宜,林中应设计与坡向垂直的林带,林带造林密度大于常规造林密度。     

Overstory and shrub effects on natural regeneration processes in native Pinus radiata stands

Native Monterey pine (Pinus radiata D. Don) stands on the Monterey peninsula have been significantly modified by natural and anthropogenic disturbances. The exclusion of fire and the introduction of pitch canker (caused by Fusarium circinatum Nirenberg & O’Donnell) created a need for the examination of these changing ecosystems with respect to regeneration, especially as these stands reach mature ages. We established 210 plots on 35 transects distributed throughout five stands in order to describe the current stand structure and quantify the extent and condition of regeneration. The results indicated that Monterey pine seedling establishment varies throughout the peninsula depending on percent canopy cover, duff and litter depth, and percent shrub cover while seedling growth is influenced by percent shrub cover. Canopy cover was also found to inversely influence shrub cover. Our study highlights the importance of understory removal to increase Monterey pine regeneration and seedling growth as canopy cover decreases, especially in areas where coast live oak (Quercus agrifolia Nee) and poison-oak (Toxicodendron diversilobum E. Greene) are abundant.     

谈国有林区分类经营改革问题

从大兴安岭林区分类经营改革中的7个方面,分析论述国有林区分类经营改革的问题,并提出分类经营改革要结合林区实际进行研究试点,在有利于森林的可持续发展和发挥三大效益的前提下稳步推进。     

台湾杉引种造林试验初报

台湾杉在来舟林业试验场经6年的引种造林试验表明;1年生苗高16cm,造林4年后幼林平均高2.99m,胸径3.96cm;造林初期生长较缓慢,第4年明显加快;育苗与造林技术均容易掌握,具有重要的引种价值。     

杨梅岭林场混交林调查初报

对霞浦县杨梅岭林场杉木、马尾松混交林和杉木、柳杉混交林初期生长的实地调查表明,10年生杉木、柳杉混交林的单位蓄积量比杉木、马尾松混交林大72.2%,比杉木纯林大2.4倍,为较为成功的混交方式。     

浅议贵州森林旅游的深层次开发

在分析旅游文化与贵州森林旅游深层次开发相互关系的基础上，结合贵州森林旅游业发展的实际情况，阐述了贵州森林旅游深层次开发的必要性和可行性，提出贵州森林旅游深层次开发的设想和保障措施。     

观光木人工林驯化栽培试验和系统生产力研究

本文对观光木驯化栽培环节中的采种、育苗、造林、管抚等摸索了一定的经验,并用分层切割法测定10年生样本地上部分各器官的生物量,用壕沟法测定地下部分根系的生物量。结果表明:10年生林分生物量为55.03t/hm~2,其中乔木层为53.035t/hm~2(占96.37%),乔木层中树干、枝、叶和根系分别为37.91t/hm~2、6.17t/hm~2、2.21t/hm~2和6.75t/hm~2。18年生解析木数据表明:胸径、树高和材积速生期分别出现在4—12年、5—7年和第14年。     

四川盆地主要土壤类型抗侵蚀能力研究

土壤抗侵蚀性能是影响土壤侵蚀的最基本因素,主要取决于土粒和水的亲和能力;土壤抗冲性与侵蚀的发生关系更为密切.对四川盆地4个土类17个土属的527个土壤样本的土壤抗蚀性进行了关联分析和主分量分析;对土壤抗冲性作了逐步回归分析和主分量分析.研究结果认为,四川盆地宜林地土壤抗蚀性和抗冲性各分为4级:紫色土抗蚀性顺序为中性紫色土>钙质紫色土>酸性紫色土;抗冲性顺序依母岩排列为:遂宁组>夹关组>自流井组>沙溪庙组>篷莱镇组>城墙岩群.土壤抗侵蚀能力是土镶抗蚀性和抗冲性的综合反映,在不同的地形和森林植被条件下,土壤抗侵蚀能力会有变化.