Geochemical Assessment For Land Quality In Pingan-Ledu Typical Area

In this paper,the distribution of beneficial elements,harmful elements and healthy elements in the soil of typical selenium-rich areas of pingan-ledu,as well as the content characteristics of heavy metal elements in irrigation water,atmosphere and crops were studied.In this paper,the typical selenium-rich area peace-music at the same time set up a high-quality selenium-rich land quality archives,explored the land quality geochemical assessment results in land management applications,for the local government land,the scientific management of the rich selenium provides the basis of detailed information and data management system,improve the service level of land resources management.According to the geochemical grade of land quality in the study area,92 high-quality agricultural map spots are mainly distributed in the scattered land of shengou,liujia village,huangtan village and hongshuiquan in yurun town.There are 484 fine spots distributed in most areas of yurun town,including hongshuiquan village,jiucaigou village,beiling,majuan,suoergan and other areas in hongshuiquan township.The good agricultural land hongshuiquan area is more than yurun area,mainly distributed in the forest and grassland of hongshuiquan area.Medium land is scattered within the district.There are 130 differential pattern spots,which mainly exist in yangquan village,shangxing garden and loess hill-foot land of hongshuiquan township in yurun town,occupying a small area.The level of atmospheric environment and water environment in the research area belongs to level 1.The overall safety and quality of crops are good,with 92.5% of the samples in the first grade of crop safety.The second and third grade crops are mainly herbage.Through the study on the selenium level of crops in the research area,strong selenium-rich crops were screened out,including wheat and oats in cereals,rapeseed in oil crops,garlic in vegetables,broad beans in beans and Jerusalem artichoke in potato,and the green rate of wheat and garlic is 100%.According to the evaluation results,73 plots of excellent selenium-rich land were delineated,and a total of 10 excellent selenium-rich farmland areas and land files were established.The delineation and archival construction of selenium-rich fields provide detailed technical basis for the site selection,specific planting planning and field management of selenium-rich bases.According to the distribution characteristics of the excellent selenium-rich land in the area and the development status of the local industry and agriculture,especially the selenium-rich industry,some Suggestions on the suitability planning of the selenium-rich industry in the working area were given.In the construction of selenium-rich garlic base in yurun with shengou,liujia and huangtan as the leading areas,the main characteristic crops garlic and garlic bolt are planted,and the auxiliary interplanting of corn is provided,and the tourism and sightseeing area of the plateau selenium-rich garlic base is built.Five major functional areas have been planned in hongshuiquan,including hongshuiquan-jiucaigou selenium-rich agricultural science and technology demonstration base area,xiaoshuiquan-majuan selenium-rich agriculture and animal husbandry combination area,beiling selenium-rich oats test base area,ajiying-xianergan selenium-rich coarse grains and grass production area,and lashuling selenium-rich livestock breeding area.