Research On The Plant Diversity Of Linpan In Chengdu Plain

With the rapidly development of the global economy and the accelerated process of ur banization, human society has had a series of unprecedented environmental problems, whic h are closely related to the over-exploitation of natural resources. Then the international co mmunity is giving more attention to the biological resource protection at the same time of t he developing the economy. The city's biological diversity and human settlement environm ent are also closely linked to the sustainable development. Research on plant diversity in ur ban green space is an important way to achieve protection and construction of the urban bi ological diversity.Linpan in Chengdu, which is a historical combination of the Dujiangyan water irritati on system, the agriculture production and the living way of the family system and a integr ation of the life, the production and the ecological environment, has the space forms of the cultural symbols and the use values. Its a relative concentration of suburban living area. Th e plants in Linpan have greening, landscaping, and viewing as well as other functions, whi ch are important on people's quality of life, mental and physical health. Besides, some of th e plants have a certain economic value. The research range of this article mainly involves t he Second and the Third Circle of Chengdu, whose areas are completely developed and sig nificantly characterized, and from ancient days to now have a strong representation.This art icle is based on the investigation on the plants of Linpan in Chengdu Plain to find out the g reen status of plant resources of Linpan in Chengdu, by means of analyzing the species co mposition, calculating and discussing the plant diversity characteristics between different a reas and different types of Linpan, in order to provide some theoretical basis, basic data an d useful recommendations for the protective development planning and the construction of the Linpan.(1) In the scope of investigation, there were 69 families,148 genera, and 181 species of plants. Classification on the type of living:90 trees,40 shrubs,40 herbs,11 bamboo; cla ssification on the geographical area:the Second Circle has 56 trees,32 shrubs,24 herbs,7 bamboo, and the Third Circle has 81 trees, shrubs,27 species,35 species of herbs, bamboo 7. (2) Coverage and importantance value are used to calculate the speices diversity index-Margalef,diversity index-Simpson, Shannon-Wiener, probability of interspecific en counter (PIE). Pielou evenness index (JSW and JSI) individually. These Indexes are the in dicators for evaluating the diversity of various types of green plants of Linpan in Chengdu Through the principal component analysis on the 5 pairs of these indicators, the compreh ensive evaluation of plant diversity standards are obtained. According to the General Stan dard, the diversities of the various green plants are sorted:Diversity of the Second Circle Diversity of residence-ty pe plant.(3) Based on the results of the investigation, analyzing and concluding the primary ca uses on the influence of the multiplicity of the green space plants, we summarize the impor tance of plant multiplicity on the development of the Linpan in Chengdu and put forward t he improvement proposal of the Linpan plate. Finally give some suggestions on enriching t he species diversity of Linpan in Chengdu:Strengthening the introduction domestication of the indigenous plants; the reasonable development and utilization, constructing the urban e cology homeland and insisting that the sustainable development path enhances the public t he sense of participation.