唐山市北郊污水处理厂绿化设计

详细介绍了唐山市北郊污水处理厂绿化的设计构想、规则布局和具体设计手法，并说明园林设计必须结合实际情况，因地制宜，适应不同的功能需要。     

湛江南国热带花园植物群落调查

为了构建稳定合理的植物群落,更好地发挥城市公园植物群落的生态功能,采用样方法对湛江南国热带花园的植物群落进行调查。结果表明,湛江南国热带花园主要植物以热带及亚热带植物为主,地域特色明显,植物群落的类型较丰富。物种重要值总趋势表现为：乔木层<灌木层<草本层。物种多样性指数表明,Pielou均匀度指数集中于0.6~0.8之间,Shannon-Wiener指数集中于1.7~2.3。调查表明,湛江南国热带花园植物群落物种多样性丰富,但形成更稳定合理的植物群落仍需要引进新的植物种类及良好的养护管理。     

Persistence of Gunnison’s prairie dog colonies in Arizona, USA

Although the five species of prairie dogs (Cynomys spp.) are recognized as important components of grassland ecosystems in western North America, they have experienced major population declines due to poisoning, outbreaks of sylvatic plague, recreational shooting, and habitat conversion. From May 2000 to October 2001, we investigated 270 colonies of Gunnison’s prairie dog (Cynomys gunnisoni) in Arizona. Because these colonies were classified as active in previous surveys (1987, 1990-1994, 1998), we were able to examine their persistence. Most (70%) of the colonies became inactive between the initial and recent surveys, with colony extinctions spanning our study area. Colony persistence was positively associated with the persistence of the nearest neighboring colony but was not associated with major vegetation type, distance to nearest neighboring colony, or initial size of the colony. The amount of area occupied by individual colonies varied between surveys, sometimes dramatically. We found little evidence that the reduction in active colonies was due to poisoning, recreational shooting, or habitat conversion. Rather, direct and indirect evidence suggest plague is the primary factor negatively impacting Gunnison’s prairie dog populations in Arizona. Currently, there is no way to control or prevent plague outbreaks in Gunnison’s prairie dog populations. To mitigate the effects of localized plague outbreaks on the overall population of this species, we suggest that Gunnison’s prairie dog be reintroduced to public lands throughout its historical range.     

植物抗病基因研究进展

对植物抗病基因的抗病反应的分子生物学机理,抗病基因的克隆方法,成功克隆的基因、抗病基因产物的结构特征及植物抗病基因类似序列研究现状进行了综述,并对植物抗病基因工程的研究取得的成绩、存在的问题及展望进行了简介。     

Penetrating injury at the thoracic inlet in a Paint‐Arab mare

A 12‐year‐old Paint‐Arab mare was admitted for evaluation of a penetrating chest laceration at the thoracic inlet. The left brachiocephalic muscle was transected and the recurrent laryngeal nerve was traumatised. Subsequent to the injury, the horse developed Horner's syndrome on the left side of the neck and face, Grade IV left laryngeal hemiplegia, dysphagia, cough and subcutaneous emphysema. The defect was closed in multiple layers. Antimicrobial and antiinflammatory therapy was instituted along with local wound care. The mare remained bright and responsive and the wound healed normally. The mare showed no signs of respiratory distress. Dysphagia and ptosis persisted at 30 days post trauma.     

茶园套种牧草对作物产量及土壤基本肥力的影响

我国关于茶园生草和低层套(间)种研究起步很晚且报道甚少,有必要深入研究适宜我国茶园推广应用的低层茶草套(间)种模式。通过3年的田间小区试验,以不套种任何牧草处理为对照,研究了3种不同牧草[百喜草(Paspalum natatu)、白三叶(Trifolium repens)、平托花生(Arachis pintoi)]套种模式对茶青和鲜草产量及其茶园土壤基本肥力的影响。结果表明:3种不同牧草套种模式比对照提高茶青产量6.48%~20.26%,并收获鲜草产量1 352~4 023 kg·hm?2·a?1;3年来逐年减少茶园表土流失厚度幅度分别为25.0%~30.6%、33.3%~38.9%和53.3%~60.0%,并提高茶园土壤pH 9.64%~11.76%、有机质8.23%~76.13%、全氮13.59%~245.63%、全磷3.41%~210.51%、全钾1.37%~9.65%、碱解氮69.63%~109.33%和速效磷11.40%~34.20%;其中,茶园套种白三叶和套种平托花生处理对提高茶叶产量和茶园土壤基本肥力的效果相对更佳,值得在生产上进一步推广应用。     

谈古典园林动·静观及对现代园林设计的启示

在我国古典园林的规划设计和鉴赏实践中,园林的动观和静观是两种最基本的艺术方法,动观是游,静观是息,大园以动观为主,小园以静观为主,园林游赏往往是动静结合,静中有动,而动中含静。从古典园林动观、静观的概念入手,分析了对动、静产生影响的理论,最后谈到对现代园林设计的启示。     

山西忻府区城镇园林植物景观建设方法的探讨

以忻府区城镇园林植物景观建设为例,提出城镇园林植物景观的建设方法：根据城镇特色来制定园林目标,制定植物景观建设工作体系,将城镇与周围乡村景观建设相结合,创造自然化节约型的植物景观,使植物景观多样化与艺术化,并保持一定的绿量水平。     

Suitability of Bi-linear Restoring Force Model in Earthquake Response Analysis

Based on the data of dynamic tests of small single-storey steel frames,the suitability of simplified hi-linear restoring force model in earthquake response analysis is discussed, and the Maximum displacement response MD, the sum of squares of the displacements in the whole vibrating history SSD, and the total dissipated energy EI are considered respectively as equivalent object.     

景洪市乔木园林植物科分布区类型的研究

通过对景洪市城区不同类型乔木园林植物的调查,分析了其科的分布区类型.结果表明,景洪市乔木园林植物资源丰富,有65科192属294种,其中65科隶属于10个分布区类型、7个变型.景洪市乔木园林植物分布区类型以泛热带广布的科最多,有31科,占总科数的46.77％;其次为世界广布型,有11科,占总科数的16.92％.区系成分中以热带植物为主,共44科,占总科数的67.69％,引进树种占有一定比例.