现代农业科技
現代農業科技
현대농업과기
XIANDAIHUA NONGYE
2012年
3期
256-260
,共5页
陆安忠%陆奇勇%陆奇峰%陆明鑫
陸安忠%陸奇勇%陸奇峰%陸明鑫
륙안충%륙기용%륙기봉%륙명흠
植物区系%单(寡)种属%特性%湘西南山地%龙底保护区
植物區繫%單(寡)種屬%特性%湘西南山地%龍底保護區
식물구계%단(과)충속%특성%상서남산지%룡저보호구
flora%monotypic （oligotypic） genera%characteristic%southwest mountainous area of Hunan Province%Longdi Protection Zone
为探讨湘西南山地植物区系特征，分析了龙底自然保护区种子植物区系组成及其单（寡）种属的组成与特性，结果表明：保护区有野生种子植物188科859属2 174种，其中裸子植物8科15属21种；植物区系中有单（寡）种属183属，归属于83科，含209种，占区系中总属数的21.30%。单（寡）种属能表征该区植物区系的古老残遗性、特有性和亚热带常绿阔叶林区植被组成特点，能表现出植物的演化阶段与过程；单（寡）种属同植物区系中所有属的生长型组成比例与生活型谱间存在差异，但也具有一些相同的组成变化规律；植物区系属的分布区类型以热带成分为主，而单（寡）种属以温带成分为主。单（寡）种属以中国特有属、东亚特有属和热带亚洲特有属占优势。
為探討湘西南山地植物區繫特徵，分析瞭龍底自然保護區種子植物區繫組成及其單（寡）種屬的組成與特性，結果錶明：保護區有野生種子植物188科859屬2 174種，其中裸子植物8科15屬21種；植物區繫中有單（寡）種屬183屬，歸屬于83科，含209種，佔區繫中總屬數的21.30%。單（寡）種屬能錶徵該區植物區繫的古老殘遺性、特有性和亞熱帶常綠闊葉林區植被組成特點，能錶現齣植物的縯化階段與過程；單（寡）種屬同植物區繫中所有屬的生長型組成比例與生活型譜間存在差異，但也具有一些相同的組成變化規律；植物區繫屬的分佈區類型以熱帶成分為主，而單（寡）種屬以溫帶成分為主。單（寡）種屬以中國特有屬、東亞特有屬和熱帶亞洲特有屬佔優勢。
위탐토상서남산지식물구계특정，분석료룡저자연보호구충자식물구계조성급기단（과）충속적조성여특성，결과표명：보호구유야생충자식물188과859속2 174충，기중라자식물8과15속21충；식물구계중유단（과）충속183속，귀속우83과，함209충，점구계중총속수적21.30%。단（과）충속능표정해구식물구계적고로잔유성、특유성화아열대상록활협림구식피조성특점，능표현출식물적연화계단여과정；단（과）충속동식물구계중소유속적생장형조성비례여생활형보간존재차이，단야구유일사상동적조성변화규률；식물구계속적분포구류형이열대성분위주，이단（과）충속이온대성분위주。단（과）충속이중국특유속、동아특유속화열대아주특유속점우세。
In order to study the floristic characteristics of spermatophytes, floristic composition of spermatophytes and characteristics of monotypic （oligotypic） genera in Longdi Protection Zone were analyzed. The results showed that ：wild spermatophytes flora in the protection zone is made up of 2 174 species in 859 genera of 188 families, among which, gymnosperms take 21 species in 15 genera of 8 families. Monotypic （oligotypic） genera of flora is made up of 209 species in 183 genera of 83 families ,taking 21.30% of the whole flora in this area. Mouotypic （oligotypic） genera can not only display its nature of relict and endemism, and the vegetation composition characteristics of subtropical evergreen broad-leaf forests, but also reveal the stage and process of plants evolution. There are some differences between monotypic （oligotypic） genera and the whole floristic genera in composition proportion of growth form and life-form spectrum. The distribution types of the floristic genera are mainly tropical components while monotypic （oligotypic） genera are mainly temperate components. Monotypic （oligotypic）genera have an advantage in Chinese emdemic genera, endemic genera to eastern asia and asian endemic genera in tropical zone.
