Plan On Garden Plant Species Of JiLin City

In this thesis, we analyses the composing of greenbelt plant species through researching on all kinds of greenbelts in JiLin City.The ratio of evergreens quantities to hardwoods quantities is 1:50, namely, the amount of evergreens account for 2% hardwoods. The ratio of quantity of arbors to shrubs is 1:18.8. That is to say arbors is 5.3 % shrubs. The ratio of adventitious species to local species is 1:13.9. All of them are the structures of non-production greenbelt species.In production greenbelt, the ratio of evergreens to hardwoods is 1:23.7, which is corresponding to evergreens is 4.2% hardwoods. The ratio of arbors to shrubs is 1:2.3, namely, arbors is 43.5% shrubs. The ratio of fast species to slow species is 9.7:1. In another words, slow plant species is 10.3% fast plant species. Otherwise, color leaves species is 13.6% of the total nursery plants and the amount of fruit trees is 7.0% of the total nursery plants.In the thesis, we put forward the plant species proportion of plants plan in JiLin City, which base on the research on city greenbelt species actuality and theories of plant ecology as well as landscape knowledge. At the same time, we consult other plant plan in north city. The proportion is that the ratio of evergreens to hardwoods is 3:7, namely, evergreens is 30% hardwoods and the ratio of arbors to shrubs is 7:3, that is to say, arbors is 70% shrubs. In addition to this, the ratio of fast plant species to slow plant species is 7:3; means that fast plant species is 70% slow plant species. Accordingly, we put forward the principle of plants plan and make certain the plant species fitting for JiLin City. In order to adapt for city virescence development, production greenbelts also need proportional adjusting. Especially need to adjust the proportion of evergreens to hardwoods, arbors to shrubs, fast plants to slow plants. This is the key to enough virescence species and optimizes the plant species structure. At the same time, it is important to strengthen the research on plants species indraught and exploit wild enjoyable trees. Through investigating and analysis of actuality of plant species in addition to the research on plants programming and spectacle planting, we expect to provide scientific support for virescence of JiLin City. In this way, it is possible to found city greenbelt plants community in many layers, functions and structures.