思茅松人工林地位指数表的编制与应用

以lgH=a b／A等6个数学模型拟合收集到的166块思茅松人工林标准地优势木树高导向由线，结果选用拟合效果较好的Riehards函数模型：H=26．6907(1-e^-0．049999A)^0.9515编制地位指数表。基准年龄为20年，用标准差调整法导出思茅松人工林11～23间7条地位指数曲线，经连续树高值检验、落点检验，结果表明，该地位指数表编制精度为91．1％，可用于思茅、版纳等地区的思茅松人工林立地质量评价和生长过程预测。     

水曲柳幼林适生立地条件研究

在帽儿山地区对不同立地条件下水曲柳人工幼林生长指标进行标准地调查,并运用数量化方法研究了影响水曲柳人工林生长的立地因子。结果表明：影响水曲柳人工林生长的主要立地因子依次为坡位,土壤A层厚,坡向和坡度,其中坡位为主导因子。水曲柳人工林在中上坡位生长最好,在下坡位生长差。根据立地因子划分了34个立地类型。此外对不同立地类型的养分状况进行了分析,发现养分并不是限制水曲柳生长的主要因子。     

内蒙古集通铁路防护林构建技术研究

本项研究根据集通铁路所处的地理位置及所受沙灾、雪灾、风灾、水灾四大灾害的危害特点．以DK328 500～DK338 500为试验示范区，在调查分析当地自然条件的基础上．对沿线立地类型进行了科学的剖析和划分。针对铁路安全运输生产的要求，采用多种造林技术措施，乔灌草相结合，阻固造封并举．迅速恢复沿线林草植被。     

湖北省南方型杨树人工林立地指数表的编制

根据全省杨树主栽品种混系造林的生产实际以及南方型杨树品种(品系)间高生长过程的相似性,利用31块标准地优势木树干解析资料,把方程lgH=0.730+0.6011lgA作为导向曲线数学模型,编制了湖北省南方型杨树立地指数表。该表对于指导杨树的分类经营、定向培育,以及配套经营技术的研究与开发具有重要意义,同时,对于树高生长过程与南方型杨树相似的其它杨树品种(品系)也可参考使用。     

金沙江干热河谷立地类型的划分及其造林技术措施

通过对金沙江干热河谷实地考察与资料分析,初步划定了各地干热河谷的上限和层域范围。提出了地形是影响金沙江干热河谷水分变化的主要因子,确定以坡向和坡位作为金沙江干热河谷立地类型划分的主要依据,划分的立地类型分别是:坡上灌丛区,分坡上灌丛区阴坡类型、坡上灌丛区阳坡类型;坡下草丛区,分坡下草丛区阴坡类型、坡下草丛区阳坡类型;坡足冲积区;河谷平坝区。据此,针对干热河谷各立地类型的特点提出了相应的造林技术措施。     

GIS在林业专题制图中的应用

论述了运用于理信息系统软件完成应用遥感技术进行思茅地区样地清查及进行“二项调查”的制衅工作，重点阐明了整个制作过程、成果分析、该注意的几点事项。成果得到相关部门的认可，该方法可应用于林业专题图的制作。     

Comparison of the modified Weibull and Richards growth function for developing site index equations

A site index model based on the Weibull cumulative distribution function was fitted to three stem analysis data sets of black spruce (Picea mariana (Mill) BSP), white spruce (Picea glauca (Moench) Voss) and aspen (Populus tremuloides Michx.). The resulting equations were compared with those based on the modified Richards' (1959) biological growth function (Ek 1971; Payandeh 1977, 1978). The Weibull-type model performed as well as or better than the biological growth function for white spruce and aspen, respectively, but it performed less accurately in the case of black spruce. The Weibull-type model appears to behave better, i.e., it produces more realistic height growth patterns, than the Richards function upon extrapolation particularly at young ages.     

林木施肥的有效立地指数区间与目标肥效

应用“八五”国家攻关课题“主要工业用材林施肥技术研究”及前人的研究成果，论证和确定了林木有效施肥条件和肥效目标.我国杉木施肥的有效立地指数区间为[10,18]；林木施肥的最佳经济效益目标增量与立地指数和单位产出价值成正相关，与不施肥的产量、优势木的平均养分浓度及单位投入价值成反相关；在自然上壤肥力状况下，氮磷钾均为高目标肥效的限制因子．     

Stand structure and the regeneration ofChamaecyparis pisifera (Sieb. et Zucc.) Endl. on sites with different soil development in an old-growth coniferous forest, central Japan

Stand structure and the regeneration ofChamaecyparis pisifera on sites with and without well-developed soil in an old-growth coniferous forest, Akasawa Forest Reserve, central Japan, were investigated, along with their relationships to other important coniferous species. Of stems ofC. pisifera≥5 cm diameter at breast height, stems with intermediate size were absent in stands on the developed-soil site, while those with smaller size increased in stands on the undeveloped-soil site, which supported a higher density ofC. pisifera. In the stands without recent tree-fall of canopy stems on the developed-soil site, canopy stems ofC. pisifera were distributed uniformly and the understory stems, patchily. On the other hand, both canopy and understory stems ofC. pisifera in stands on the undeveloped-soil site were distributed patchily. In the understory,C. pisifera occurred as clonal patches formed by vegetative reproduction on various types of microsites including bare rocks. However, the clonal patches did not occur in a stand on the developed-soil site with dense saplings of an evergreen conifer,Thujopsis dolabrata, which can expand vegetatively with a well developed soil layer. Gap formation may induceC. pisifera to develop tree-form stems from shrubby clonal patches. On developed-soil sites,C. pisifera stands that survive a long disturbance-free period on this site need catastrophic disturbance for their regeneration, which will eliminateT. dolabrata in the understory and create bare soil for colonization ofC. pisifera from seeds. On undeveloped-soil sites,C. pisifera replaces itself continuously by effective vegetative reproduction. Ground instability and the wet condition of this site may promote the replacement.     

试论结合场地特征的杭州湖滨和北山路景区规划设计

探讨了风景园林师如何正确理解场地特征,在保留场地原有景观典型性的基础上,营造出最适宜这片土地的地域性景观。杭州是一个历史悠久的山水风景城市,西湖风景区既有得天独厚的自然景观,又有大量的历史人文景观及传统街区。杭州西湖风景区中的湖滨景区和北山路景区是探索场地特征营造的典型案例。