广州园林博览会的历史成就及可持续发展

广州园林博览会自1994年起每年举办一次，是春节期间重要的花事活动和园林行业综合性竞赛活动，一直受到各界人士的好评。文章回顾了广州园林博览会的发展历程，重点介绍了2004年至2014年的展览主题、内容、规模等，分析了广州园林博览会对本地城市建设的影响，并探讨如何促进园博会健康、可持续发展。     

广州花文化品牌的对外宣传与展示——以广州第29届园林博览会为例

第29届广州园博会于2022年3月31日-4月2日顺利展出。因疫情防控要求,本届园博会以海心沙主会场线上云观展与珠江公园分会场线下开放相结合的方式同步进行,让全球观众“云”赏春光,领略春意(图1)。活动注重质量、彰显特色、传承经典,展示广州园林建设发展的新理念、新技术和新成果,呈现广州等大湾区城市建设风采和历史文化风貌,体现疫情中花城广州的温度。     

文化重构视野下广州城市公园的建设与发展

在岭南完成文化重构的历史进程中，岭南园林逐步由边缘走向中心，成为我国园林事业发展的引领力量之一。作为见证者和重要载体，广州城市公园在文化重构的过程中不断完善和充实自身，日益焕发新的生机。以文化重构为视角，重点研究了中华人民共和国成立70年来广州城市公园建设与发展的活态历程，联系不同时期的社会文化背景，总结并揭示社会文化发展与公园建设的内在关系。多元汇通的文化基底、与时俱进的时代政策以及务实求新的人文精神为现代岭南园林的发展道路指明了方向，为岭南园林地位的进一步提升增加了底气和信心。     

第二十八届广州园林博览会学生设计竞赛成功举办

值第二十八届广州园博会之际,为激发园林学子景观设计创新意识和实际建造能力,培养风景园林行业实践创新型人才,中国风景园林学会教育工作委员会、广州市林业和园林局、广东园林学会及华南理工大学建筑学院携手举办了以"湾区花开"为主题的广州园林博览会学生设计竞赛。本次学生设计竞赛于2020年10-12月开放方案征集,共收集到来自142所院校的494份学生作品,其中有14份设计作品突围进入最终评审。     

《北京园林》征稿启示

《北京园林》是北京市园林绿化局与北京园林学会联合主办的园林行业综合性期刊，也是园林学会的会刊。它集政策性、学术性、知识性、资料性为一体，主要刊登城市园林绿化、园林规划设计与施工、园林植物的引种与栽培技术、草坪与地被植物、园林生态、植物保护与病虫害防治、节水园林与节水技术（中水的应用、滴、喷灌技术等）、园林机械、园林古建、园林史志（园林历史和文化）、园林赏析和国外本行业相关领域发展的译文以及有关“新北京，新奥运”方面的学术论文、学术研究、学术动态、科研威果、技术经验、科普知识及相关信息等内容。欢迎广大读者踊跃投稿。     

书画传友情——粤澳共贺广东园林学会六十华诞

今年4月初、5月中,广东园林学会书画艺术专业委员会与澳门地区文化艺术学会进行了两地互访和友好交流。4月7—9日,澳门地区文化艺术学会一行13人在赵维富会长的带领下到访广州,祝贺广东园林学会成立六十周年暨相关综合文化艺术展开幕。广东园林学会领导彭承宜、书画艺术专业委员会主任莫广松及部分会员热诚欢迎接待了澳门地区嘉宾。在穗期间,粤澳两地妙手丹青进行了“湾区一家亲”书画雅集,参观了广州中国国家版本馆和南越国宫署遗址博物馆,游览了北京路文化步行街、从化流溪河溪头村旅游区,并就粤澳文化源流进行了交流探讨。     

从网络传播的角度看中国园林的发展

互联网的快速发展,给园林的发展带来了重大影响,网络传播已经成为影响中国园林行业发展的重要因素。本文通过分析网络传播给中国园林发展造成的传统园林的中断、外来园林的冲击以及对园林市场的影响等方面的困境,但同时也带来了文化碰撞促进新思潮的交流、公众参与使得园林品位的提升、先进技术带来设计语言的创新等机遇。阐述了网络传播下中国园林发展的主体方向应该是园林传统的继承、融入外来文化以及积极创新。提出要充分利用网络传播,参与世界范围的园林交流活动、开展国内相关学科技术交流、建立网络评论平台,加大群众监督反应的影响力、推广应用电子商务,促进园林产业的发展。     

《北京园林》征稿启示

《北京园林》是北京市园林绿化局与北京园林学会联合主办的园林行业综合性期刊，也是园林学会的会刊。它集政策性、学术性、知识性、资料性为一体，主要刊登城市园林绿化、园林规划设计与旆工、园林植物的引种与栽培技术、草坪与地被植物、园林生态、植物保护与病虫害防治、节水园林与节水技术（中水的应用、滴、喷灌技术等）、园林机械、园林古建、园林史志（园林历史和文化）、园林赏析和国外本行业相关领域发展的译文以及有关“新北京，新奥运”方面的学术论文、学术研究、学术动态、科研威果、技术经验、科普知识及相关信息等内容。欢迎广大读者踊跃投稿。     

纪念广东园林学会成立50周年系列报导

2012年11月17日是广东园林学会成立50周年纪念日,为此,学会于11月15日在广州中山纪念堂举行了一系列庆祝活动,包括庆典表彰大会,"传承岭南园林文化"和"创新岭南园林建设"两场论坛和文艺晚会。     

《广东园林》杂志2019年协办单位及编辑委员会全会成功召开

2019年7月23日《广东园林》杂志协办单位及编辑委员会全会在广州黄花岗公园会议室召开。《广东园林》杂志编委会常务副主任彭承宜,主编朱纯,编委白嘉雨、邢福武、陆琦等专家及协办单位代表与编务共28人参加会议。会议首先由朱纯主编作《广东园林》编辑部2018年至今的主要工作情况汇报。杂志始终关注行业理论、一线技术和管理创新等方面的文章和信息,追踪行业热点、亮点,丰富栏目及内容;报道协办单位动态信息,并为其提供先进项目及科研技术宣传的服务平台;持续加强自身建设,努力提升杂志质量,并通过与高校进行专题约稿、共办论坛等方式,扩大杂志的宣传、提升影响力等。     

Browsing Damage on Pine (Pinus sylvestris and P. contorta) by a migrating moose (Alces alces) Population in Winter: Relation to Habitat Composition and Road Barriers

In Scandinavia, moose (Alces alces L.) sometimes cause severe browsing damage to economically-important pine. Moose-vehicle accidents have spurred construction of fences along roads, and these may interfere with moose migration between summer and winter ranges, or the road alone may be a barrier. If this happens and moose build up along roads, landowners may suffer economically. Therefore, this study investigated whether roads, fences or other factors influence the use of young pine stands by moose. Eighty stands along roads in northern Sweden were evaluated in which individually-browsed branches were counted on 9972 pines. Moose browsing was not significantly related to birch (Betula pendula Roth, B. pubescens Ehrh.) density, nor did it differ between pines (Pinus contorta Douglas or P. sylvestris L.). However, increased pine density, site productivity and proximity to a highway were associated with increased browsing. Further large-scale studies are needed to understand moose habitat selection and the effects of roads.     

Effects of Root Freezing on the Physiology and Growth of Picea glauca,Picea mariana and Pinus banksiana Seedlings Under Different Soil Moisture Regimes

The root systems of 2-yr-old Picea glauca, Picea mariana and Pinus banksiana seedlings were submitted to various frost temperatures during an artificial frost to induce different levels of root damage. Frost-damaged and control seedlings were placed in a greenhouse under high and low soil moisture regimes. Seedling growth and physiology were evaluated periodically. Seedling survival was reduced when root damage reached levels of 60-80%. Root systems of all three species showed partial to total recovery by the end of the experiment. In general, root freezing damage caused reductions in seedling growth, with these reductions becoming less significant over time. Root damage had little to no effect on black spruce and jack pine seedling physiology, while white spruce CO 2 uptake decreased with increasing root damage. Shoot nitrogen content of all three species decreased slightly with increasing root damage.     

Stand Structure in Pine,Spruce and Deciduous Forests: A Comparison Between Finnish and Russian Karelia

This study investigated the stand structure in pine, spruce and deciduous forests in the border district of Finland and Russia. A total of 46 mature forest stands was selected as pairs, the members of each pair being as similar as possible with respect to their forest site type, age, moisture and topography. The stands were then compared between the two countries by means of basal areas and number of stems. The proportions of dominating tree species were 2-12% lower, and correspondingly the proportions of secondary tree species higher, in Russian forests. The density of the forest stock was also higher in each forest type in Russia. The forests in the two countries differed most radically in terms of the abundance of dead trees. The amount was two to four times higher in Russian deciduous and spruce forests, and in pine forests the difference was 10-fold. The stand structures indicated that Russian coniferous stands, in particular, were more heterogeneous than intensively managed pine and spruce stands in Finland.     

Growth and Terminal Bud Formation in Picea abies Seedlings Grown with Alternating Diurnal Temperature and Different Light Qualities

The root collar diameter and the height:diameter ratio are of particular importance in container-grown seedlings where a high density in the containers may produce spindly seedlings. Temperature regimes and light quality are known to affect plant growth. The aim of this study was to identify responses in Picea abies (L.) Karst. seedlings grown with light providing different red:far-red ratios and under temperature regimes with alternating day (DT) and night temperature (NT) from negative (DT < NT) to positive (DT > NT) difference (DIF) between DT and NT. Experiments were conducted in controlled environment chambers and in a daylight phytotron. Only limited thermoperiodic responses appeared in P . abies seedlings with respect to seedling height and dry weight accumulation. The formation of terminal buds, however, was clearly delayed in seedlings grown at negative DIF. The results indicate a requirement for day extension light that is high in far-red, to prevent terminal bud formation under natural short-day conditions. An extended study should be conducted to clarify the minimum level of light intensity and the optimal light quality needed to prevent terminal bud formation under natural short-day conditions.     

CAD与建筑设计的关系

本文分析了CAD在设计中引起的正面和负面影响,并进行了系统的阐述,从而使设计者在应用中能够保持客观的态度。     

Natural Regeneration in Clear-cuts: Effects of Scarification,Slash Removal and Clear-cut Age

The effects of soil scarification (mounding), slash removal and clear-cut age on the natural regeneration in clear-cuts was evaluated using data from four sites in southern Sweden. The treatments were carried out during a good seed and establishment year for birch ( Betula pubescens Ehrh. and B. pendula Roth). Scarification had the strongest positive effect on the density of naturally regenerated seedlings, especially in birch, but also in pine ( Pinus sylvestris L.) and spruce [ Picea abies (L.) Karst]. Slash removal had a positive effect on birch density. No statistically significant effect of clear-cut age was found. In addition, no statistically significant interactions between clear-cut age and scarification or slash removal were found. The ingrowth of field vegetation was the fastest in areas that were not scarified, less rapid in areas scarified on old clear-cuts, and the slowest after scarification in fresh clear-cuts. In conclusion, it may be possible to control the density of birch during a good establishment year for birch. If birch is desired, the best combination of treatments is to remove the slash and scarify; otherwise, these treatments should be avoided.     

Risk Perception Among Non-industrial Private Forest Owners

Based on an enquiry, risk perception among non-industrial private forest owners is described in relation to climate change and forestry hazards. Of the respondents, 11% took action to remedy the effects of climate change. Out of a given set, hazards were ranked according to each respondent's experience of recent substantial financial loss to the estate and in relation to his or her willingness to make investments aimed at risk reduction. For each hazard, the respondent assessed the risk in four classes ranging from very high to negligible risk. Six hazards were considered most problematic in all three aspects: browsing damage, falling timber prices, damage by wind, spruce bark beetle, root rot and pine weevil. A majority of the respondents claimed to take action to reduce the risk associated with at least one hazard, while 35% did not know whether they did. Excluding climate change, the need for decision support was the largest in relation to damage by wind owing to a combination of perceived high risk and a high level of ignorance in relation to whether risk-reducing measures were taken.     

Interactions in decomposition and N mineralization between tropical legume residue components

In situ produced plant residues contain a mixture of different plant components of varying quality. To assess synergistic or antagonistic interactions occurring during the decomposition and mineralization of such mixtures, individual plant parts (stems, leaves, leaf litter and roots) or the mixture of stems, leaves and leaf litter of the agroforestry species pigeonpea (Cajanus cajan) or of crop residues of peanut (Arachis hypogaea) or of the weed hairy indigo (Indigofera hirsuta) were incubated in pots for 19 weeks. Periodically, remaining plant residues were sieved out (>2 mm), weighed and N content as well as soil mineral N determined. Above- and below-ground residues of peanut decomposed fastest and showed the largest N release in agreement with their high N concentration and low-acid detergent fibre (ADF) : N ratio. Hairy indigo was hypothesized to be of lower quality than pigeonpea because of its high-polyphenol content. However, it decomposed faster than pigeonpea, largely because of the higher N and lower lignin concentration of its components. Ranking of individual plant components for N mineralization resulted in the following pattern, leaves > leaf litter > roots > stems. In mixtures of the different plant components a similar species order in decomposition was obtained, e.g. peanut > hairy indigo > pigeonpea. The amount of N released from the mixture was dominated by stem material that comprised 46–61% of the mixture. The interactions in mixtures were relatively small for peanut (generally high-quality components) as well as for pigeonpea (low proportion of high-quality components, i.e. N rich leaf material). However, a positive interaction occurred during later stages of N mineralization in the mixture of hairy indigo as it had a significant proportion of N rich components and absence of highly reactive polyphenols. Thus, for plants with low to intermediate chemical quality attributes, manipulating plant composition (e.g. by varying harvest age, affecting stem and leaf proportions) will be important to obtain significant interactions during decomposition when its components are mixed.     

Pasture production and tree growth in a young pine plantation fertilized with inorganic fertilizers and milk sewage in northwestern Spain

The use of organic waste materials such as milk sewage as an organic fertilizer could have the dual advantages of organic-waste disposal and reduced dependence on inorganic fertilizers. The effects of fertilization with (1) conventional mineral fertilization, (2) milk sewage sludge at 40 kg N ha⁻¹ target rate and (3) no fertilization on pasture production and tree growth were examined in an experiment consisting of two pasture mixtures under a one-year-old Pinus radiata plantation with a density of 2500 trees ha⁻¹. The two pasture mixtures were: (1) Dactylis glomerata L. var. saborto (25 kg ha⁻¹) + Trifolium repens L. group Ladino (4 kg ha⁻¹) + Trifolium pratense L. var. Marino (1 kg ha⁻¹); (2) Lolium perenne L. var. Tove (25 kg ha⁻¹) + Trifolium repens L. group Ladino (4 kg ha⁻¹) + Trifolium pratense L. var. Marino (1 kg ha⁻¹). The experiment began in the spring of 1995 using a randomized block design with three replicates in Castro Riberas de Lea (Lugo, Galicia, north-western Spain). Plot size was 12 × 8 m², with a 1 m buffer strip between plots. Two-year data showed that fertilization with either material had a positive effect on pasture production, with no significant difference between the two fertilization treatments. Tree growth in the milk sewage sludge plot was significantly higher than in the control plots. Inorganic fertilization increased pasture production, but affected tree growth negatively. The results show that milk sewage sludge could be used as a fertilizer in silvo-pastoral systems. This revised version was published online in June 2006 with corrections to the Cover Date.