南非山龙眼科(Proteaceae)植物介绍

山龙眼科是起源最古老开花植物家族之一,全世界约60属1300种,主要分布在南半球,大部分种类在澳洲和南非,此外在南美洲和东南亚有少数种类.种类最丰富最集中的地区是南非的西开普和澳大利亚的东部和西部.     

走进绚丽多彩的植物王国——南非

南非是位于非洲大陆最南部的国家,东、南、西三面环印度洋、大西洋,海岸线近3000km,国土面积122万km2,居非洲第10位;人口4600多万,为非洲第5位,黑人占到全国人口的77.5%。在一般人印象中,似乎南非很穷,而且很容易把战乱、沙漠、饥饿、艾滋病与南非联系起来。而实际情况并不尽然,在某些方面和领域,南非完全可以用"很富有"、"很先进"这些词汇来形容。短短10d时间,我们在南非方面的精心安排下,先后访问了约翰内斯堡、行政首都比勒陀利亚、立法首都开普顿等多个大城市。所到之处,都可切身感受到这个国家具有的生机、朝气以及先进的现代化设施、较高的文明程度。     

南非常用的园林植物

南非观赏植物资源丰富。本文介绍了南非园林绿化上常用的外来树种蓝花楹、美丽异木棉、火焰木、茶花、筋杜鹃等;常用的本土植物非洲朴、吊瓜树、南非羊蹄甲、硬骨凌霄、紫雪花、天堂鸟、百子莲等。     

稀有鸟类物种的家园——南非

素有“彩虹之国”美誉的南非,自然风光绮丽．动植物种类繁多。南非多种多样的栖息环境和丰富的植被资源为品种多样的鸟类提供了一个完美的生息繁衍之地。     

南非的芦荟植物

芦荟属（Aloe）植物为百合科（Ljliaoeao）多年生肉草本植物。Aloe来源于拉丁语Alloeh,意思为苦味。本属植物约330种,原生在南非的就有200多种。中国有一个变种——中华芦荟【Aloe veta L．var．chinensis（Haw．）Berg．】,是翠绿芦荟（A．Vega L．）的变种。主要生长在较干旱的红壤、丘陵。南非是很多重要芦荟种类的原产地。比如：南非芦荟（A.africana）、木芦荟（A．arborescens）、大树芦荟（A．bainesii）、红刺芦荟（A．ferox）、扇芦荟（A．plicatilis）等等。     

植物王国的物种多样性

去南,以其植物种类繁多而被大家形象地称为"植物王国"。到底有多少种植物,一直众说纷纭,有各种口径。最近完成的《云南植物志》算是对这个"王国"的家底有了一个较为全面的答案。     

北京动物园植物应用调查与分析

以北京动物园的植物为调查对象,采用全面踏查和样方法相结合的方法,调查和分析植物多样性。结果表明,北京动物园共有植物218种,隶属68科、159属,优势科有蔷薇科、禾本科、豆科、木犀科等8科。乔灌草的比例为1.08∶1.00∶0.79,常绿植物与落叶植物的比例为1∶4.3,乡土植物与外来植物的构成比例接近于1∶1。北京动物园植物群落多样性的各项指标均处于较高水平。Simpson指数为0.642~0.951,Shannon-Wiener多样性指数为0.774~1.525,Pielou均匀度指数为0.420~0.797。植物群落中低频度物种数量明显多于高频度物种数量。物种多样性的变化趋势与物种丰富度指数、Pielou均匀度指数的变化趋势基本一致。植物多样性的变化受人工种植所形成优势种的影响与干扰。     

重金属污染土壤的植物修复技术

土壤重金属污染有害人类健康，影响环境质量和经济的可持续发展，如何有效的净化污染土壤，维持可持续的对土地的利用已经成为当今世界重要的问题之一，利用植物修复土壤重金属污染，保护环境是当今的热点课题。本文就利用植物对重金属污染土壤的修复原理和土壤重金属污染修复的植物选择技术进行讨论。     

广西猫儿山植物新记录

1．木兰科：平伐含笑2．番荔枝科：野独活3．樟科：大叶新木姜4．防已科：黄叶地不容5．山龙眼科：山龙眼6．葫芦科：毛胶股蓝     

南非的国家植物园

南非共有9个国家植物园,由南非国家生物多样性研究所管理,每个植物园各具特色。本文介绍9个国家植物园的概况及其特点。     

Dendroclimatology in South Africa

ABSTRACT

Contrary to the few other studies conducted in Southern Africa, mean site-index per soil series was only significant at a low level (P ? 0,10). No significant differences were apparent when a broad soil grouping using only morphological characteristics was tested. It is concluded that detailed soil mapping for site index determination is not justified in the Umzimkulu District, Transkei.     

在“彩虹之国”来一场自然之旅

南非,在我心目中一直是一个比较神秘的国度,之前对它的了解仅限于好望角、曼德拉、世界杯、克鲁格国家公园,还有传说中的钻石。这个美丽的国家,因其多姿多彩的自然景观、历史文化以及不同肤色种族的人们和平共处,而被称为“彩虹之国”。这次,我终于有机会踏上这块神秘的土地,拉开了为期一周的南非之旅。     

Provenance Performance of Liriodendron tulipifera in South Africa

Four provenances of Liriodendron tulipifera were imported from the United States in 1973. Test plantings were made in three forest regions of South Africa, with major trials being established in one of the regions. The resulting provenance rankings show a classical clinal variation pattern with the southernmost United States source exhibiting the best growth rate. All sources tested appear to be equally sensitive to rat and buck damage.     

南非野生动物保护启示

简要介绍了南非野生动物保护现状,并重点总结了南非野生动物保护管理工作给我省的启示,并就浏阳株树桥华南虎栖息地改造提出了合理建议。     

Antioxidant activity of Erica arborea

The antioxidant properties of the methanol extract of leaves and flowers of Erica arborea and the ethyl acetate, butanol and water soluble fractions were investigated. The ethyl acetate extract was found to be the richest for phenolic and flavonoid content which showed the highest antioxidant activity.     

Early Provenance Performance of Eucalyptus citriodora in South Africa

A limited selection of Eucalyptus citriodora seedlots planted in provenance trials at six locations in South and South West Africa are discussed. At three years of age no significant differences are present for height, DBH, or volume production. Stem form is reported to be good.     

Biomass equations for selected drought-tolerant eucalypts in South Africa

In the water-scarce environment of South Africa, drought-tolerant eucalypt species have the potential to contribute to the timber and biomass resource. Biomass functions are a necessary prerequisite to predict yield and carbon sequestration. In this study preliminary biomass models for Eucalyptus cladocalyx, E. gomphocephala and E. grandis · E. camaldulensis from the dry West Coast of South Africa were developed. The study was based on 33 trees, which were destructively sampled for biomass components (branchwood, stems, bark and foliage). Simultaneous regression equations based on seemingly unrelated regression were fitted to estimate biomass while ensuring additivity. Models were of the classical allometric form, ln(Y) = a+x₁ln(dbh)+x₂ln(h), of which the best models explained between 70% and 98% of the variation of the predicted biomass quantities. A general model for the pooled data of all species showed a good fit as well as robust model behaviour. The average biomass proportions of the stemwood, bark, branches and foliage were 60%, 6%, 29% and 5%, respectively.