To study the population characteristics of Cycas fairylakea D. Y. Wang, a comprehensive field investigation was conducted with the help of GPS system. In this study, the quantitative characteristics and age structure of the genet were analyzed, and their distribution pattern and grow conditions were evaluated. In investigation, 1 013 C. fairylakea trees were found,which distributed in patch. Although the population scale and structure get better recovery,being limited by the topography and microclimate conditions, the growth conditions and natural proliferation ability of the population is still very fragile. To make C. fairylakea get rid of endangered status, it is proposed to establish a protection area for it and adopt necessary measures to promote the regeneration and development of the population.

采用组间平均联结法对深圳市主要植被群落进行划分,并应用Gleason丰富度指数、Shannon-Wiener指数、Simpson指数和Pielou指数对主要植被群落的物种多样性水平进行比较分析。结果表明:深圳市城市森林可以划分为5个群系组和31个群落类型;各群落类型的物种多样性均表现为灌木层>乔木层,常绿阔叶人工林的乔木层和灌木层的生物多样性指数均最低,常绿落叶阔叶人工林乔木层丰富度指数、Shannon-Wiener指数、均匀度指数均最高,常绿阔叶人工林的乔木层优势种比较明显。

By afforestation trial, the adaptation and growing states of 5 Banksia robur provenances in Jianfengling of Hainan were studied, and the effects of provenance and fertilizer treatment on the survival rate, height and ground diameter were analyzed. The results showed that all the 5 provenances had a good adaptability in Hainan province. 2 months after planting, the survival rate was 85%, but it was easily affected by air humidity and became lower in the dry season, especially the provenance No.38164, showing that the B. robur needs wet environment. The study also found that different provenances and fertilizer treatments had significant impact and interactions on the growth of B. robur. The provenance No.38163 had the fastest grow speed, with 1.35 mm of ground diameter increment and 10.57 cm of height increment during 3 months, while the provenance No.38164 had the lowest grow speed. The provenance No.39163 also had a strong barren resistance, while the provenances No.38177 and No.38199 needed well water and nutrient conditions. Different fertilizer treatments could enlarge the difference in growth status of the provenances, and the composted cattle manure had the best effect on promoting growth status, which could be used as the best fertilizer in afforestation.

本文介绍珠海市城市森林的总体布局和不同绿地类型的植物组成和配置模式。珠海城市森林分为 3大块:城市中心区森林、西部城市发展区森林、东部海岛区森林;着重分析了以下 5种绿地类型的植物组成特点和配置模式:(1)行道树的组成具有花色艳丽、花期长、树冠大而美、突出滨海特色等;(2)海岸绿地植物包括红树林、海滩植物、沿海道路和临海低丘植物 3种类型;(3)岛屿观赏植物有 6 4种,分为 5种类型;(4)黄土石坡裸露地生态绿化分为 3个阶段,采用 4种不同的模式;(5)残次林改造采用 3种模式。

以广州的越秀、荔湾、东山、天河4个具有典型环境特征的行政区为例,分析了广州城市森林的道路绿化、公园绿化、街头绿地绿化、单位附属绿地绿化的空间格局、植物种类结构、配置和美学价值。

京九铁路深圳布吉段全长 3 km,应用 14科、18种岭南乡土阔叶树,设计 12种配置模式,营建 4 2 hm2铁路沿线绿化防护林。其中,常绿与落叶树种比例为 2:1,乔木、小乔木和灌木种比例为6:2:1,防火树种与景观树种比例为 1:2,防护林与风景林的面积比例为 8:13。

森林的多目标利用是当前林业界努力探索的方向,其中以维护大众健康为主的利用价值可能最易受到重视。休闲保健型森林以供人们休闲游憩、强身健体为主要经营目的,其营建在中国刚刚起步,其类型、作用、地位、意义,营建项目、途径和措施,以及与国民健康的关系等诸多方面不为大多数人所了解。本文强调森林在现代人休闲活动中的重要性,归纳了休闲保健型森林对人们精神、身体、技能诸方面的功效,以及休闲保健型森林的 3种服务模式。介绍了珠海市板樟山森林公园休闲保健型森林的营建,并提出进一步改造的途径和措施:(1)诱鸟森林的营建:诱鸟林的选址、诱鸟林的植物配置、诱鸟区的活动项目设置。 (2)休闲保健型森林改造的途径与措施:1营建四季分明、山花烂漫的森林;2具有人体保健功能的树种改造;3推行森林浴活动;4林相的整理与维护;5在自然保护的同时兼顾景观维护;6推行解说服务。

对引自澳大利亚的班克木属5个种18个种源进行种子形态、质量以及发芽特征测定,结果表明:班克木属种子形态、质量和发芽特征在种间和种内均有不同的差异表现;香花班克木种子千粒质量最大,约106.5 g,为其他种的4 9倍;种子千粒质量与发芽率无显著相关;除红花班克木在试验期间未发芽外,其余4个种的发芽率皆高于60%,强力班克木发芽率最高,约80%;长圆叶班克木和强力班克木种子发芽速度最快,而香花班克木发芽速度最慢;发芽始期、发芽速度、发芽率、胚轴长、胚根长都和经度呈极显著正相关(P<0.01),即自西澳的珀斯至东澳的塔斯马尼亚地区,种子的发芽始期越晚,发芽速度慢,发芽率越高,胚轴和胚根的生长量越大。对于5种班克木的发芽特征的研究表明:强力班克木在广州的适应性最强,其发芽率最高,发芽速度最快,发芽最早且胚根长度最大。

目的 探讨不同种源家系岭南槭种子形态、种子萌发与幼苗生长的特性，分析它们与种源地地理气候因子之间的关系。 方法 对广东省岭南槭天然分布区的3个种源18个家系的种子表型性状、发芽特征、幼苗生长性状和叶色表现进行方差分析和相关性分析。 结果 表明：肇庆黑石顶（HSD）种源的种子最厚、最宽，深圳七娘山（QNS）种源的种子最薄、最窄，惠州南昆山（NKS）种源的种子最长，种子千粒质量最高；翅长与翅宽呈极显著正相关（P < 0.01），种子千粒质量与发芽率显著正相关（P < 0.05）；岭南槭1年生幼苗地径与苗高成正比，幼苗生长受种源地的地理气候因子影响；在色彩表现方面，QNS3、QNS13家系的明度L^*值较大，QNS13色相b^*值显著高于其他家系，NKS14家系幼苗的色相a^*值最大。 结论 种子千粒质量越高，发芽率越高；幼苗的地径苗高生长受种源地的地理气候因子影响。NKS14家系幼苗红叶特征最明显，色彩表现较好。