Investigation and Ecological Evaluation of Plant Resources on Campus of Jiamusi University

. The purpose of the systematic investigation of plant resources in Jiamusi University campus is to understand the composition, community characteristics and ecological distribution of plant resources in Jiamusi University, and to make rational use of them. In the process of investigation, the methods of actual step-by-step search and data search are adopted to carry out ecological evaluation. According to statistics, there are 113 kinds of plants on Jiamusi University campus, of which 93 are woody plants and 18 are herbaceous plants. Its growth environment is suitable for forest margin, undergrowth, hillside, and shrub and so on. Its main uses are greening, shading, dust prevention and noise reduction. It has high value. It is hoped that the research will provide a basis for the future construction of ecological civilization on campus. research through comprehensive investigation. The results show that: most woody plants are angiosperms. There are great


Introduction
In the context of sustainable development, in order to alleviate urban ecological environment problems, our country strengthens the ecological construction of urban landscape [1]. At present, our country is in the period of vigorous development of university campus construction. Campus construction of domestic universities has entered a new period of rapid progress [2]. Most campuses are in the construction activities of new construction, reconstruction and expansion. Many university campuses in developed cities such as southern China have adapted to the development of the times and built sustainable campus landscape [3][4]. Build ecological campus, low-carbon campus and green campus to realize the sustainable development of campus. Because of its special geographical location [5]. Limited climatic conditions, limited resources and backward economy have led to some limitations and lags in the construction of campus landscape in cold regions universities [6].
Considering the sustainable development of society and the importance of landscape, it provides an opportunity for the construction of plant landscape in University campus [7]. With the state attaching importance to higher education and the continuous expansion of the scale of running a school, more and more research has been done on the construction of University campus [8]. At the same time, the construction of university campus landscape has attracted the attention of the public, and many problems have been found. For example, the location design of the activity venue of cold region university is unreasonable. And blindly imitate the construction of campus landscape in temperate and warm temperate zones. As a result, the location of the university activity venue in the cold area was determined, and the size design was unreasonable. In winter, the site is empty and bleak, and the utilization rate is low. Large areas of lawns, squares, and activities in the shadows of buildings [9]. Many universities face harsh winter weather conditions, the construction of campus landscape in winter has been neglected [10]. Forming the depression of campus scenery in winter, there is no view to enjoy. It greatly reduces the willingness of teachers and students to do outdoor activities; it embodies the importance of the investigation of plant resources on campus. The remarkable effects of garden plants in water conservation, sterilization and dust reduction, air purification, noise reduction, urban microclimate regulation and urban heat island effect mitigation are also gradually recognized and well known by the people [11]. Therefore, to investigate and understand the plant resources on Jiamusi University campus, to further improve the planning level, it plays an important role in improving the ecological environment construction of Jiamusi City, improving its ecological benefits and maintaining the ecological balance of urban human settlements environment. period is about 140 days. The average annual precipitation is 527 mm. Sunshine hours are 2525 hours. The effective accumulated temperature is 2590. Winter is long and summer is short. The frost-free period is about 130 days. It covers an area of 1965 mu (1.31 million square meters). The coordinates of the central point of the campus are E130°21′55.1″ ， N46°47′7.4″. At an elevation of 88.8 m, the climate is a continental monsoon climate in the mid-temperate zone, average annual temperature 2.9 ℃ , maximum temperature38.1 ℃ , minimum temperature -41.1℃. It has good physical and geographical conditions. It is very suitable for the growth of many kinds of plants, especially alpine plants. The area is rich in plant species. The research on this area is representative in Heilongjiang Province. The general situation of plants in this province will be further understood.

Research
Field investigation May-September 2019 Conduct. First a comprehensive survey of plant resources on Campus of Jiamusi University was conducted. The survey area covers the main areas of school life activities in Colleges A, B, C and D. These were including teaching office area, student living area, small tour park, sports area, road green space and so on. For the investigation of campus plants, a combination of on-the-spot investigation and data collection is adopted. Samples were collected and photographed on the spot. The growth and planting patterns of plants in Jiamusi University were recorded. Some of these were systematic collation and cataloguing.

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Result analyses

Analysis of Plant Composition
A, B, C and D institutes in the study area were selected for field investigation and research through comprehensive investigation. There is only 1 kind. One species of aquatic and marsh plants (Fig 1).

Characteristics of hierarchical plant communities
The

Diversity and ecological distribution of families, genera and species of woody plants
A, B, C and D institutes in the study area were selected for field investigation and research through comprehensive investigation. The results show that: most woody plants are angiosperms. There are great

Conclusion
The distribution of plants is mainly influenced by natural geographical factors and human economic activities.
Especially the difference of latitude location, land-sea distribution and altitude. Jiamusi University is located in the North Temperature Zone and has a big temperature difference in four seasons. The soil is mainly meadow soil and black soil, with rich vegetation types and high green coverage. According to the survey and statistics, as a whole, the plant resources on the campus of Jiamusi University have been rationally planted. It has created a more beautiful campus environment. In addition to satisfying the senses of sight, smell and touch. It also pays more attention to ecology, the improvement of green scenery, the humanized design of teachers and students use needs and the presentation of campus characteristics. But the Campus of Jiamusi University is located in high latitude. It belongs to the alpine region. The plants are mainly cold-tolerant plants. Limited in planting. In particular, plants lack aquatic plants for landscaping. The species of trees and shrubs are single and need to be renewed and maintained without considering the scientific-city of planting. It is suggested that the overall situation, artistry and noise reduction functions should be considered in future development planning. To maximize the role of campus plant resources and create a more beautiful environment for good teachers and students.