The Comprehensive Effect Of "Mu Qi" On The Urban Soil Remediation

Urbanization has changed the original composition and natural structure of soil cushion of urban green land in China and/which worsened the quality of soil in urban green land causing a series of soil problems including lack of nutrition of soil,soil hardening,decreased water holding capacity and infiltration capacity as well the deterioration of ecological environment of landscape plants which can also lead diseases and pests of plants.In order to learn about the influences of organic shroud “Mu qi” on the main physicochemical properties of soil in urban green land,the research investigated and analyzed the main physical and chemical properties of soil of green land in Henan Agricultural Land and comprehensively compared the soil alkali-hydrolyzable nitrogen,available phosphoru,available kalium,p H,temperature,moisture content,infiltration capacity of the soil with“Mu qi” and in bare soil through field observation and control experiment.And use the research results to the assessment of rainwater absorption capacity of “Mu qi” and evaluation on energy-saving after using “Mu qi”,the research results showed:1.The effect of using “Muqi”on the physical and chemical properties of the soil,the research results showed:(1)Control experiment pH value of soil covered with “Mu qi” was obviously lower than that of bare soil.The p H value of soil with 3cm,6cm and 9cm thick “Mu qi” was respectively 0.53,0.64 and 0.81 lower than that of bare soil.The improvement effects of “Mu qi” on soil p H value increases with the increase of thickness;“Mu qi” has good temperature regulation function for soil with obvious difference in different seasons,which was greatly different in different seasons,the average temperature of soil covered with “Mu qi” was 0.5? higher than that of bare soil in winter and 0.47? lower than that of bare soil in summer;(2)Field experiment The content of soil alkali-hydrolyzable nitrogen,available phosphoru,available kalium and organic matters of soil covered with “Mu qi” were respecively 43.50%,53.22% and 22.67%higher than that of bare soil.“Mu qi” has insignificant influences on the content of available phosphorus;The volume weight of soil covered with “Mu qi” was 3.9% lower than that of bare soil on average;The soil infiltration capacity of soil covered with “Mu qi” was 60.46%higher than that of bare soil.;The water content of soil covered with “Mu qi” was 31.45%higher than that of bare soil on average,and the improvement is greatly different in different seasons which was most obvious in summer,67.52% higher than that of bare soil.2.The research used the UAV for aerial photography of central urban area of Luohe,and classify the greenland resources.When the rainfall repetition period was 5a,the reaearch made a assessment of the water holding capacity of the bare soil in the greenland of central urban area of Luohe: the amount of rainwater absorbtion of greenland after using“Mu qi” on the bare soil was 7.89×108 m~3 more than that of wihout “Mu qi”.3.Refer to the questionnaireof management of greenland and make an evaluationof capital,energy consumption,and carbon emissions of the impact of “Muqi” on pruning,water conservation,and fertilization in green land management.Within one year,it can effectively reduce the energy consumption and capital investment by 8.70×10~7 yuan as well as the carbon emissions during by3.70×10~6 kg.