Study On The Application Of Topsoil Spinning Area Based On The Estimation Of Appropriate Range

Soil is the basis for the growth of all living things.Studies show that it takes 300-400 a lot of time to form soil of 1cm thickness under natural conditions.The higher organic matter content,better soil fertility,better water and heat status of the topsoil have important influence on the growth of crops and are extremely valuable soil resources.Soil is the basis of natural growth.Relevant research shows that it takes 300-400 a lot of time to form divestiture soil with 1cm thickness under natural conditions.The soil has high organic matter content,soil fertility,water and heat condition.It is a very valuable soil resource for crop growth.With the development of urbanization,soil is encouraged to occupy and waste much quality farmland.However,due to the high project implementation cost,the unreasonable radius of suitable topsoil use,and the difficulty of accounting for topsoil improvement,the practice of topsoil reclamation is slow.It is of practical significance for the practice of promoting topsoil reclamation and protecting topsoil resources and promoting the improvement of cultivated land quality to make clear the lifting effect of topsoil for topsoil improvement and calculate the economic benefits of project implementation.Firstly,this study makes a search and review of relevant literature and research materials at home and abroad,and finds out the relevant research progress in the reuse of topsoil.Based on the marginal benefit theory,soil erosion theory,farmland productivity theory and soil classification theory,it comprehensively analyses the actual factors that affect the yield of cultivated crops.The soil thickness,crop yield,soil texture,tillage conditions,fertilization intensity,soil organic matter content and crop variety of cultivated land were collected and measured.By means of data analysis,the stable state level of the cultivated land was determined.Effect of increasing the thickness of topsoil on crop yield of cultivated land.Secondly,according to the theory of soil erosion,the effect of land cover improvement is determined,and the total economic benefit of the project is determined by combining with the yield increase of cultivated land.Under the guidance of marginal benefit theory and cost analysis of project implementation,the suitable utilization radius of divestiture topsoil under different mulch thickness was determined.Finally,taking Shenyang as an example,this paper analyses the layout planning of topsoil divestiture reuse,analyzes the shortcomings of this research and discusses the future work prospects.The relationship between the thickness of cultivated soil surface and corn crop yield in Shenyang city was studied.The results showed that,when the other factors affecting the crop yield were stable,the thickness of topsoil was in the 5-24.5 cm range.With the increase of the thickness of topsoil,the increase of corn yield decreased gradually.The quantitative relationship between soil surface thickness and farmland productivity in Shenyang area can be expressed by function Y =-18.768 x 2 + 921.5 X + 1425.3(5 Ag X 24.5);Based on the mean soil erosion model in Liaoning Province,the results of soil cover improvement in thickening 5 cm and 10 cm were 46.5 years and 93 years respectively.The results show that the suitable transport radii of 5cm of topsoil covering soil with 10 cm,15cm and 20 cm are 51.56 km,28.66 km and 3.86 km respectively.The suitable transport radii of the topsoil stripped 10 cm thick to cover the cultivated land with a reference thickness of 10 cm and 15 cm are 89.73 km and 39.92 km respectively?The show on the layout design of Shenyang city after the deployment and use of topsoil stripping: the soil thickness of farmland soil 5cm reference 20 cm the only topsoil stripping potential lies circle utilization;surface soil the thickness of covering soil of cultivated land benchmark 5cm and 10 cm 15cm,1,2,3,5,6,stripping ring;No.8 stripping ring;between 2 and 4 can be coordinated by stripping ring;surface soil thickness for farmland soil base 10 cm 10cm,1-8 May 22 coordinated by stripping ring,there is no distance limit;when the soil layer thickness of overburden 10 cm benchmark land 10 cm,can meet the needs of Shenyang city will be stripped topsoil The area outside of the deployment,can be used to Kaiyuan,Tieling,Anshan,Benxi,from the city of Shenyang from within 90 km area,select suitable plots covering soil topsoil use.