Effects O F Wind Power Station On Vegetation And Soil Properties

Wind power caused the disturbance of the atmospheric circulation, changed the microclimate, and had direct or indirect impact on the ecological environment of underlying surface, vegetation and soil as an important part of ecological environment, vegetation characteristics will be affected for different degrees, soil properties will also change. In this paper, Huitengxile wind power station as the research object, based on modern vegetation ecology and restoration ecology theory, combining field investigation and laboratory analysis together, compared and analysis vegetation characteristics and soil properties on field experimental plots built wind power generation and did not build wind power station, analys ising the influence of the variation characteristics of vegetation and soil. Draw the following conclusions:(1) The field experimental plots built wind power station, the species composition of plant community is a new basic biological substituted, the dominant species were instead of new species; Wind power plant put into operation in the same period between different units of surrounding vegetation coverage were not obviously, the construction of wind power plant area and not to build wind power plant on the same vegetation coverage, the same was significantly greater than the plot built wind power plant, vegetation cover and wind power plant put into operation to correlated sampling interval significantly,( the level of significance is 5.5), the correlation coefficient is 0.935:the biomass of control sample without the construction of wind power plant was significantly higher in the experimental plots, 40 m radiation radius values of biomass was significantly higher than that of 20 m, on the same plant community mean height was significantly higher than that of wind power plant construction area.(2) With the depth increas ing of vertical distance in the range of 0-50 cm, the average soil bulk density of each period showed a tendency to increase.(3) Different construction period of the wind power plant soil moisture values : On the same soil water content values are greater than the construction of wind power plants’ s soil moisture content values.(4) Wind power generation field in different production period, the soil p H at different distances or the p H in different depth have no significant difference, but the p H value was more than 7, that is a weak acid.(5) The soil available nitrogen content of the plot not built wind power plant was significantly higher than the wind power field plots. The wind power station that put into operation earlier, the available nitrogen content is higher, as to shorten the production time, the content of soil available nitrogen decreased gradually; The average content of soil available phosphorus was significantly higher than that of all of wind power plant samples, the highest content of available phosphorus in soil sample is without the construction of wind power plant, available phosphorus content built wind power plant is gradually increases with increas ing operation time. With the increase of soil depth, the control samples not built wind power station and the plots built wind power station, the content of available phosphorus in soil is significantly reduced.Wind power generation plant soil available P in different production period with the overall decreased to increase the distance of wind turbine, in addition to the 1999 stage of the wind power generation over the counter, wind power station and other production time in the same radiation radius, the soil available phosphorus content increased gradually with the production time to extend.(6) The 1996 period, 1999 period and 2002 period wind farms that the production time is earlier, Soil total nitrogen content and the control plots had little difference; Soil total nitrogen percentage decreased with increasing depth, just reduce the degree of different, with increasing distance from the wind turbine,soil total nitrogen content showed a general upward trend. The total potassium content of soil total phosphorus is still less than the construction of wind power field plots. The 1996 and the 1999 period of wind power field, the soil total potassium content percent with the increase of soil depth decreasing trend, the wind power field of other production period and control plots and no obvious regular change, with the increase of soil depth, total potassium content increase and decrease trend is the characteristics of alternating. From the fan changes of total phosphorus in different soil increases radiation radius decreasing trend was not obvious, changed little, basically showed stable state. Wind farm put into operation in the same period, soil total potassium content changes of wind power generator in 60 m radiation radius range is not significant, beyond the obvious change of 60 m, the 1996 and the 1999 period of wind power field outside the range of 60 m, with the increase of the distance, the total potassium content reduce, and reduced the large amplitude.(7) In the control sample, the soil organic matter content percent is higher than the plots of wind power station, with the increase of depth, the soil organic matter content showed a decreasing trend, the content of soil organic matter is the highest in10 cm under the influence of wind power generation, gradually reduced with the decreas of the depth, the lowest soil organic matter content is in 50 cm. The content of soil organic matter with the distance increas ing is increasing trend, the soil organic matter content in commissioning period earlier wind farm is a relatively stable growth, a short production time wind farm, the soil organic matter content increased fluctuation.