Evaluation On Soil Quality Of Fen River Park Greenland In Linfen

As an important part of urban green space,urban park is the main place for the citizens to contact with nature and entertainment.The soil of park gre en space is the necessary link of urban ecosystem and energy cycle transformation,and it is also the site foundation and growth medium of urban vegetation.However,the soil is often affected by urban activities and urbanization process,which makes the s oil fertility and ecological function decline,the soil is polluted by heavy metals and even harmful to human health.Therefore,it is of great theoretical and practical significance to study the characteristics of soil fertility and heavy metal content in urban parks,and to explore the sources of heavy metal pollution and the evaluation of soil fertility and environmental quality.In this paper,the soil of the river park green space as the research object,through field investigation and laboratory test,the fertility index and the contents of heavy metals in Fen river park greenbelt soil,using SPSS17.0 and ArcMap10.1 software for data correlation analysis,variance analysis and spatial interpolation analysis.The modified Nemero index method was used to evaluate the soil fertility quality,and the single factor pollution index method and the comprehensive pollution index method were used to evaluate the environmental quality of the soil in the region of China.The quality of the soil was evaluated by using the method of index.The main results are as follows:(1)The soil p H of the Fen river park on the east and west coast was alkaline,and the soil organic matter was at very low and low level respectively,the available nitrogen was at low and low level,the available phosphorus was medium and low level,and the available potassium reached high level.T test was conducted on the soil fertility indexes of the green land on both sides of the Fen river park,the results showed that there were significant differences in organic matter,p H,available potassium and available phosphorus except alkali-hydrolyzed nitrogen.In addition,the spatial variation of organic matter,available nitrogen,available phosphorus and available potassium in the soil samples of the study area was significant,which indicated that the study area was influenced by man-made soil.The improved Nemero comprehensive index method was used to analyze the Fen river park fertility quality evaluation results show that the studyarea east,west coast and the overall comprehensive fertility index were 1.14,1.11,1.17,fertility grade are three,belonging to the general fertility.(2)The heavy metal content in the green soil of the study area shows that the accumulation intensity of both sides is Pb> Zn> Cu> Mn> Ni,and the enrichment of Pb is higher,Zn is enriched to a certain extent,Cu is rich in individual pl aces Phenomenon,Mn,Ni artificial accumulation is small,enrichment is not obvious;The spatial distribution characteristics of heavy metals in the soil of Fen river park showed that the east coast was densely populated,and the accumulation of heavy metals was slightly higher than that of the west bank.And close to the road and the flow of people,the accumulation of heavy metal elements,followed by the concentration of green belt area,near the Fen river bank soil heavy metal accumulation.(3)The correlation of soil fertility index showed that most of the factors were significantly correlated.The east coast of nitrogen,phosphorus,potassium and organic matter were significantly positively correlated significantly negatively correlated with p H,alkali hydrolyzable nitrogen,available phosphorus and potassium were significantly correlated with two poles.On the west side of nitrogen and organic matter,available phosphorus and available potassium were significantly correlated,available potassium and p H was significantly negative off.(4)Correlation analysis results of the sources of heavy metals showed that Zn,Cu and Pb may come from human activities(such as traffic pollution,the park is not reasonable fertilization effect,etc.),although Mn Ni by human activities influence,but i t is more influenced by the natural factors.(5)To planting soil grade II standards and two national standards,the method of single factor pollution index showed that the heavy metal elements in Fen river park greenbelt soil pollution in Shanxi province.Soil background values for the standard,the study area Zn,Cu slight pollution,Pb moderate pollution,Mn Ni basically no pollution.The planting soil gradeII standards and two national standards,according to the Nemero comprehensive pollution index method,Fen river park greenbelt soil did not reach the degree of harm to plant growth and human health,in a safe level in Shanxi province.Soil background values for the standard,the study area has reached moderate pollution,should be strictly management and protection,to avoid future soil heavy metal pollution is more serious.