| 摘要: |
| 调查于1997年10月至年6月进行。分布范围狭窄的物种采用样方调查,分布面积较小的物种采用资源全查法,区域性广泛分布或局部地域广泛分布的物种采用样方调查,辅设线带、线段单元。按《中国植被》分类系统归类。调查发现自然分布目的物种75种,其中属国家Ⅰ、Ⅱ级保护物种分别为22种和40种、省级保护物种13种,属广西特有17种、我国特有58种。物种的分布区类型以热带分布为主,50%属于古老成分。广西广布种仅有樟(Cinnamomum camphora)和金毛狗脊(Cibotium barometz),南部岩溶地区的局域广布种是蚬木(Burretiodendron hsienmu)、任豆(Zenia insignis)、剑叶龙血树(Dracaena cochinchinensis),其他多数物种的分布面积都很狭少。除金毛狗脊外,现存资源量(株数)在100万株以上的种类仅有任豆和剑叶龙血树,占全区重点保护野生植物物种总数的2.7%;10万~100万株的有8种,占10.6%;1万~10万株有9种,占12.0%;0.1万~1万的有20种,占26.7%;100~1000株的有24种,占32.0%;现存不足100株的有11种,占14.7%;部分种类现存株数极少,如广西火桐(Erythropsis kwangsiensis)3株、水松(Glyptostrobus pensilis)9株。未发现目的物种14种,其中国家Ⅰ、Ⅱ级保护物种分别为2种和7种、省级保护物种5种。 |
| 关键词: 野生植物 保护植物 资源量 评价 |
| DOI： |
| 投稿时间：2001-12-26修订日期：2002-02-07 |
| 基金项目:全国重点保护野生植物资源调查项目[1997林护通字79号]资助。 |
|
| Status Quo and Evaluation of Natural Resources of Emphasis Protective Wilding Plants in Guangxi |
|
Liu Yan, Ning Shijiang
|
| (Guangxi Institute of Botany, Yanshan, Guilin, Guangxi, 514006, China) |
| Abstract: |
| A survey was conducted in Guangxi region from Otc.1997 to June 2001. Sample plot is used for the plants with narrow distribution area;one by one check for the plants with small distribution area;Sample plot supplemented belts and unit routes for the plants of wide distribution in local area and region.The plants are sorted out by the taxonomic system in the book of China Fauna.Seventy-five of the listed plants are found, of which 22 species are the national class Ⅰprotective plants, 40 species the national classⅡ protective plants,13 species the provincial protective plants 17 species are special for Guangxi,and 58 species special for the nation. The tropical component is predominant in all plants.The antique species account for 50% of total species. Cinnamomum camphora and Cibotium barometz are widely distributed in Guangxi. Burretiodendron hsienmu, Zenia insignis and Dracaena cochinchinensis are widely distributed in the karst area of southern Guangxi.The distribution area of other species is quite small.Only two species have one million upward individuals,accounting for 2.7% of total emphasis protective wilding plants in Guangxi;8 species 100000 to one million, accounting for 10.6%;9 species 10000 to 100000,accounting for 12.0%;20 species in 1000 to 10000,accounting for 26.7%;24 species in 100 to 1000,accounting for 32.0%;11 species less 100,accounting for 14.7%.Some species are much less,such as Erythropsis kwangsiensis, only three individuals; Glyptostrobus pensilis,9 individuals.14 listed plants are not found in the survey. Among them, two species are the national classⅠ protective plants;7 species are the national classⅡ protective plants; and 5 species are the provincial protective plants. |
| Key words: wilding plants protective plants quantity of resources evaluation |
