Investigation On Soil Status Of Greenbelt In Central City Of Urumqi

This study in urumqi city of Tianshan,Saybagh and New town district.In addition,soil texture,conductivity,pH value,soil organic matter,alkali-hydro nitrogen,available phosphorus and available potassium concentration were analyzed in 2010.Meanwhile,soil trace element content also was analyzed,which assess the city of green land quality and strengthen scientific management.These results showed that:(1)The city soil organic matter concentration range of 2.5-92.17 g/kg,which the mean was 38.13 g/kg;Alkaline hydrolysis nitrogen concentration range and mean were 4.45-69.36 mg/kg and 30.82 mg/kg,respectively.Available P concentration range of 0.25-52.88 mg/kg,there was a mean was 8.80 mg/kg.In addition,the rapidly-available potassium,pH and Electrical conductivity concentration of the range were 30.3-629.7 mg/kg,7.68-7.68 and 23-705 ?s/cm,respectively.Their mean values were261.16 mg/kg,8.40 and 180.84?s/cm,respectively.(2)For urbanization of soil texture,nitrogen and phosphorus availability concentration of results showed that low content of organic carbon has a certain contribution,mainly displays in the leaking fat.In addition most gradient exists in the urban green space in urumqi,the rains washed out and nutrient leaching.(3)Compared to the nature of the soil under different functional areas: residential area and unit affiliated green space relative to the road green belts and areas of high organic matter content,mainly because of the dense population,a large number of garbage into life.Park green space and residential green space available p content at a higher level of green space of residential area,besides the effects of fertilizing may also affected by the phosphorus waste into.(4)In terms of vertical variation of soil properties contrast: the soil profile of urumqi city,organic matter,alkali-hydro nitrogen,available phosphorus and available potassium content distribution regularity,and the same profile available p content between different levels and different section of large variability.(5)The city soil organic matter,available phosphorus and available potassium content is higher,and low alkali solution nitrogen,lower content of farmland soil in Xinjiang.(6)In order to understand the Urumqi city soil heavy metal pollution level of urban green space in Urumqi city in 8 soils in different functional areas of heavy metals(Pb,Cd,Hg,As,Zn,Mn,Cu,Fe)the content and distribution were studied by single factor pollution index and comprehensive pollution index is calculated for each regional pollution situation.The results showed that different regional sampling points of single factor of potential ecological risk coefficient shows that each region are at a low risk.And the sum of the single factor of potential ecological risk coefficient calculation of comprehensive potential ecological risk index(RI),from the numerical see the regional comprehensive pollution index increased in the order of affiliated green space,residential green space,road green belt park,green space.