【摘要】 在河池市兰科植物调查的基础上,分析该地区兰科植物的种类特征、区系特点和濒危原因,提出保护对策。结果显示:1河池市野生兰科种类资源丰富,分布不均。调查有兰科植物62属183种,占广西兰科植物总属数(108属)和总种数(388种)的57.41%和47.16%,是广西兰科植物最丰富的区域之一。2地理成分复杂,热带性质明显。河池市兰科植物的属共有12个类型,3个变型,地理成分复杂多样,以热带成分占绝对优势,其属的R/T比值达3.54,其所含种的R/T比值达5.90,植物区系的热带性质十分明显。3多数种类主要分布于海拔100~1 800 m,垂直分布跨度大。4生活型齐全,以地生兰种类最多,有34属100种,占总种数的54.64%,其次是附生兰,有26属78种,占总种数的42.62%,再次是腐生兰,有5属5种,占总种数的2.73%。5导致河池市兰科植物濒危的因素有人类活动影响和物种生物学原因,人类活动的影响是其致濒的主要原因。提出加强就地保护、迁地保护等兰科植物保护对策。更多还原

【Abstract】 Based on the investigation of orchid flora in Hechi city,the species feature,flora characteristic,endangering cause of wild orchid flora were analyzed,some protective countermeasures were proposed after that. The results were as follows:( 1) Wild orchid species were abundant,uneven distribution.There were 62 genera,183 species in Hechi from now on,made 57. 41% and 47. 16% of the total number of genera( 108) and total species( 388) in Guangxi. It was one of the most abundant regions of orchid in Guangxi.( 2) The geography components were complex,the tropical character was obvious.There were 12 genus and 3 variants of orchid in Hechi. The geography components were complex and various. The advantage of Geography component was tropical character. The rate of tropical and temperate genera( R / T) was 3. 54. The rate of tropical and temperate species( R / T) was 5. 90.( 3) Orchid’ s species mainly distributed between 100 ~ 1800 miters in Hechi. The distributions of orchids were extensive.( 4) The life form of orchid was various in Hechi. There were 34 genera and 100 species( 54. 64%)of terrestial orchids,26 genera and 78 species( 42. 62%) of epiphytic orchids,5 genera and 5 species( 2. 73%) of saprophytic orchids.( 5) Human activities and species biological characteristics led to the endangered species of orchid,especially human activities. On the results of the survey,some protective countermeasures were proposed for orchid of Hechi in the paper.更多还原