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At the area of Ragweed(Ambrosia artemisiifolia) dominated Kyongsan, Yeongcheon and Taegu city we made the vegetation table based on Braun-Blanquet method on 100 plots from April to October 1999. Through the interspecies affinities, DECORANA and TWINSPAN methods we anlized the developing ragweed vegetation and soil properties of investigated plots. Communities of the investigated area were Ambrosia artemisiifolia community, Humulus japonicus community, Setaria viridis community, Artemisia princeps-Erigeron conadensis community, Amphicarpaea edgeworthii community, Echinochloa crus-galli community, Ambrosia artemisiifolia-Artemisia princeps community, Erigeron conadensis-Ambrosia artemisiifolia community, Tagetes minuta-Ambrosia artemisiifolia community, Artemisia princeps community and Miscanthus sacchariflorus community, and the number of species comosed were 108. Coverage of the herb layers were 85 - 100%. Soil properties of investigated area were pH 6.91, 1.05% of organic matter, 0.048cmol/kg of K, 2.57cmol/kg of Ca, and 5.57cmol/kg of Mg. Contents of Mn, Fe, Cu, Zn and Cr were under the level of natural contents. Through the interspecies affinities analysis it showed 1 big species group of Ambrosia artemisiifolia, Humulus japonicus and 57 species. The whole investigated area with 20 sites were divided into 3 communities by the methods of classification and ordination.
본 연구는 귀화식물인 만수국아재비(Tagetes minuta)가 집중적으로 출현하는 경북 영천지역과 경주지역에서 Braun-Blanquet의 방법으로 1998년 4월부터 10월까지 130개 방형구에 대한 식생조사를 수행한 후, x^2- Test, DECORANA, TWINSPAN의 분석기법을 이용하여 만수국아재비의 초기군락유형을 분석하고자 하였다. 조사된 식물군락들은 Tagetes minuta community, Persicaria hydropiper-Tagetes minuta community, Tagetes minutg-Lespedeza cuneata community, Tagetes ninuta-Lactuca serriola community, Echinochloa crus-galli var. oryzicola community, Amphicarpaea edgeworthii community, Amphicarpaea edgeworthii-Humulus japoricus ommunity, Humulus japonicus community, Persicaria thunbergii community, Kummerowia mtipulacea- Amphicarpaea edgeworthii community, Erigeron canadensis community의 12개 군락이었고, 총 출현종수는 97종으로 나타났으며, 초본층의 식피율은 75~100%이었다. 종간 친화력분석결과, Artemisia princeps, Tagetes minuta, Bidens frondosa 외 33종으로 구성된 하나의 큰 종군과, Humulus japonicus 외 6종으로 구성된 다른 하나의 작은 종군으로 구분되었다. 분류법과 서열법을 수행한 결과, 26개 지역은 네 개의 그룹으로 나누어졌다. Early developing community composition of a naturalized plant, Tagetes minuta, was analyzed by x^2_Test, TWINSPAN, and DECORANA treatment on the base of data obtained from 130 quadrats by Braun-Blanquet method, in Yongch'on and Keungju areas of Keungbuk province from April to October 1998. The vegetation of investigated area was divided into 12 communities: Tagetes minuta community, Persicaria hydropiper-Tagetes minuta community Tagetes miuta-Lespedeza cuneata commumity, Tagetes minuta Lactuca serriola community Echinochloa crus-galli Var. oryzicola community, Amphicarpaea edgeworthii Community Amphicarpaea edgeworthii-Humulus japonicus community, Humulus japonicus community Persicaria thubergii community, Kummerowia stipulacea-Amphicarpaea edgeworthii community and Erigeron canadensis community. a total of 97 species was found in whole investigated area and coverage of hurb layer was 70~100%. The plexus diagram by the affinity analysis showed two species groups of Artemisia princeps, Tagetes minuta, and Bidens frondosa with 33 species and Humulus japonicus with 7 species. The 26 surveyed areas were divided into 4 groups by TWINSPAN and DECORANA.
From April to October 2001, we studied on vegetation of 60 plots through the methods of Braun-Blanquet at Cheonsaengsan, Yuhaksan and Supdemisan in Gyeongbuk. Through the methods of interspecific affinity analysis, DECORANA and TWINSPAN the patterns of plant communities of 60 were analysed. It showed 6 communities at Cheonsaengsan, 5 communities at Yuhaksan, 6 communities at Supdemisan and total appearance of 128 species and covered with 50∼95% of tree layer, 20∼90% of shrub layer, 20∼90% of herb layer. As the result of interspecific affinity analysis it showed one big specific complex composed with 52 species and the 60 plots were divided into 4 groups by classification and ordination. One big species complex as a result of affinity analysis and eigenvalue of 0.303 at first step by classification indicate that Cheonsaengsan, Yuhaksan and Supdemisan are in developing stage of succession.
To study the vegetation of Osip riversides at Yeoungdeok Kyeongbuk, we screened 59 plots by the methods of Braun-Blanquet from April to October 2002. To analyse community patterns in this area, we used the technique of interspecies affinity calculations, DECORANA and TWINSPAN for the 59 plots. Investigated area was divided into 15 communities with 112 species, and covered with 0∼70% of Shrub layers and 35∼100% of herb layers, but no tree layer. By the interspecies analysis this area was divided into 2 groups of one big group with 41 species and a small group with 6 species, but by the methods of ordination and classification, it divided into three groups. This area was divided into two groups by the interspecies affinity test, but divided with eigenvalue of 0.284 at first step of classification. It shows that the succession is on the way in this Osip river sides.
From April to October 2001, we studied on vegetation of 60 plots through the methods of Braun-Blanquet at Cheonsaengsan, Yuhaksan and Supdemisan in Gyeongbuk. In whole area of Cheonsaengsan, Yuhaksan, Supdemisan we gave the grades based on the criteria of ministry of environment, and described an actual vegetation map based on physiognomy. Through the methods of Braun-Blanquet it showed 6 communities at Cheonsaengsan, 5 communities at Yuhaksan, 6 communities at Supdemisan and total appearance of 128 species and covered with 50∼95% of tree layer, 20∼90% of shrub layer, 20∼90% of herb layer. The vegetation in actual vegetation map divided by physiognomy were 8 communities at Cheonsaengsan, 8 communities at Yuhaksan, 10 communities at Supdemisan. The vegetation with more than vegetation grade Ⅲ was not appeared and it means that this area needs continuous conservation plan.
At the area of Yuhak, Cheonsaeng and Seongam mountains in Kyeongbuk, we studied the vegetation patterns with 75 plots on the base of Braun-Blanquet methods from March to October 2002. For the analysis of community patterns with 75 plots we used interspecies Affinity analysis method, DECORANA and TWINSPAN. The investigated area was divided into 17 communities with 177 species, and 20∼100% of treelayer, 10∼95% of shrublayer and 20∼100% of herblayer. By toe method of affinity analysis, it showed a big community with 86 species, but divided into 6 small groups by ordination and classification methods. Although it appeared as one group by the affinity test, the area divided into two groups by classification method at second level with eigenvalue of 0.320 and 0.430. It shows that the area of Yuhak, Cheonsaeng and Seongam mountains have own properties and in the process of succession.