The Relationship Between The Soil Characteristics And Plants Of The Green Land In The Different Functional Districts Of Hangzhou

The urban green land ecosystem has a huge ecological benefit and promotes the development of city and the life of people in the city.With the fast urbanization,the urban ecosystems are being disturbed seriously,and the urban environmental problem is becoming more and more serious. Nowadays the study of urban ecosystem protection and restoration is becoming the focus of attention. Hangzhou as a fast urbanization city in the east of china, the urban green land ecosystem are under the dense and strong disturbance, the ecological service function are becoming vestigial. It is very important in changing the ecological environment and the quality of life. So we had done a lot of works about the structure and function of the urban green land ecosystem.We (1)compared the temporal and spatial distribution of the soil nutrient elements in the urban green land ecosystem;(2) studied the temporal and spatial distribution of the nutrient elements of plants in the urban green land ecosystem of Hangzhou;(3)analysied the relationship of the nutrient elements between soil and plant.The main results are as follows:(1)The soil of the urban green land ecosystem in Hangzhou exist obvious spatial heterogeneity.The contents of organic carbon in soil for scenic area> residential areas Agricultural land> overpass> urban wasteland> education area> industrial area> two sides of the traffic.The contents of organic carbon distribution in the vertical section in soil have very significant-difference. In general, with the increase of depth the contents of organic carbon in soil becoming less. The contents of NH4+-N, NO3--N and total nitrogen in the eight kinds of urban green land all have very significant difference.The contents of NH4+-N distribution in the vertical section of soil only in industrial area and agricultural land have very significant difference.The contents of N03--N distribution in the vertical section of soil only in scenic area and agricultural land have very significant difference.And the contents of effective phosphorus and total phosphorus of soil in the eight kinds of urban green land all have significant difference.(2)The contents of organic carbon,total nitrogen and total phosphorus of plant show difference in the eight kinds of urban green land. The contents of organic carbon, total nitrogen and total phosphorus show difference in the different plant organs of the same plant. The contents of organic carbon, total nitrogen and total phosphorus show difference in different plants from the same habitat. The contents of organic carbon, total nitrogen and total phosphorus in the same plant organic of the same plant from the different habitat are also difference. There are maybe relation to the contents of soil, the type of plant and the structure and function of different plant organic, or to other factors.(3)The content of organic carbon, nitrogen and phosphorus of soil changed with the seasonal variation in the urban green land. And this is maybe relation to temperature, moisture, the process of the plant growth and anthropogenic disturbance, or to other factors.The content of organic carbon, total nitrogen and total phosphorus of plant organic also changed with the seasonal variation in the urban green land.(4)There are negative correlations between organic carbon of plant and organic carbon of soil. There are positive correlation between total nitrogen of plant and inorganic nitrogen of soil. The correlations between total phosphorus in different plant and the soil phosphorus elements are difference.