Study On The Evaluation Of Cultivated Land Quality And Changes In Cultivated Land Quality In Ningde Jiaocheng District

The research on the renewal evaluation of arable land quality can reflect the changes in the quantity and quality of arable land in real time.This study is based on the results of 2010 arable land quality in Jiaocheng District,Research on Changes in Cultivated Land Increase and Quality in 2013,2014,and 2015.Using the spatial superposition analysis function of ARCGIS software,get the increase and decrease of arable land(occupied by construction,disaster damage,agricultural restructuring,ecological restoration,supplementary development)within three years and the construction of arable land quality(land consolidation,comprehensive agricultural development,farmland water conservancy construction,etc.)by the field reconnaissance and data collection,selection of evaluation parameters and certain criteria for the evaluation of arable land quality grade,obtaining update results of arable land quality in 2013,2014,and 2015 in the study area,and then obtaining the trends of quantity and quality for the arable land in 2013-2015.Through empirical research on Jiaocheng district,the following main conclusions have been drawn:1.The quality of national natural,utilization,economy of arable land in Jiaocheng district is mainly concentrated in the middle grade and lower grade sections,with the highest grade being 5,the lowest grade being 13.The national natural grade is mainly distributed in grade 6,7,8,9,10.The national utilize grade is concentrated in grade 8,9,10,11,12.The national economic grade is concentrated in grade 7,8,9,10,11,12.2.From 2013 to 2015,the number of arable land distribution have shown small quantity of high grade and lower grade and a large amount of medium grade cultivated land.The overall conforms to a "normal low,medium high" normal distribution structure.The geographical distribution of arable land quality and other characteristics basically shows a trend of decreasing from the basin to the mountainous area,from the center of the city and the township area to the remote area.3.From the perspective of the comparison of the quality of arable land of various types from 2013 to 2015,the quality of paddy fields and irrigated land in Jiaocheng district is relatively high,the dryland grade is low.The natural quality of irrigated land is mainly distributed in grade 9,10,while the dry land is mainly concentrated in grade 10,11.