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Study On The Flora Of Seed Plants Of Daguping Forestland In Shuangpai County, Hunan Province

Posted on:2009-03-11Degree:MasterType:Thesis
Country:ChinaCandidate:R W QiuFull Text:PDF
GTID:2120330332481917Subject:Botany
Abstract/Summary:PDF Full Text Request
Daguping forestland was located in southwest Hunan Province, Shuangpai County, near the northeast of Guangxi and northwest of Guangdong. The geographical coordinates is N 25°33', E111°23'. The main physiognomy in Daguping forestland is low hill and hill, and some middle hill. There has many vegetation types, and mainly is evergreen broadleaf forest in central sub-tropical area. The typical arboreal families which hold a predominate status in forests are Fagaceae, Lauraceae, Rosaceae, Magnoliaceae, Hamamelidaceae, Daphniphyllaceae, Elaeocarpaceae, etc.On the basis of twice plant investigation in May and October,2007, some interrelated documents and datum, the spermatophyte list has been gained. After analyzed the spermatophyte flora in this paper, flora composing, flora proper phenomenon, geographical coordination, substitution phenomenon, flora ascription has been researched. The main research result is:1. There had 159 families,593 genus and 1235 species spermatophyte in Daguping forestland. Among them,4 families,5 genus and 5 speices are gymnosperms, and 155 families,589 genus and 1230 species are angiospermae. It has plenty and variety living types in angiospermae.2. Variety flora types, obviously transition character. There has 10 types and 10 variational types in families, mainly is pantropic distribution type, northern temperate zone distribution type, and world distribution type. There had 14 types and 11 variational types in genus, most is pantropic type in tropical distribution types, and northern temperate zone type, east-Asian type, east-Asian and northern America discontinuous type are more in temperate types.3. Flora transition obvisously. The spermatophyte flora belongs to eastern-China flora, but nearly connected to central-China flora, Southern-China flora, and Yunnan-Guizhou-Guangxi flora. The flora composition mainly intermixed by tropical species and temperate species. Dagupign forestland is one of the plant diffusing passages to surrounding flora area.4. Eastern-China flora character. According to the results of flora analysis, and considering landform, physiognomy, climate, hydrography, vegetation, etc, the spermatophyte flora in Daguping forestland belongs to Eastern-China flora area, subtropical character.5. Rarity and endangered species abundantly. There has 57 species in variety rarity and endangered plants, among which has 24 species in national wild protected plant list,2 species in national officinal wild ptotected plant list,10 species in national rarity and endangered proteted plant list, and 6 species in national rarity protected trees list.6. New finding for species distribution and plant community. The new species distribution in Hunan province, is Passiflora kwangtungensis in Passifloraceae, and Amorphophallus yunnanensis in Araceae. The wild Chimonanthus nitens community is the first founding in Hunan Province, Chimonanthus nitens hold a predemidate status in this steady community, and have powerful germination character. The new community finding is very important for Chimonanthus nitens research and utilization.
Keywords/Search Tags:Flora, Spermatophyte, Flora composition, Living types, Daguping forestland, Hunan
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