Construction and empirical analysis of green productivity evaluation system of agricultural land

Green productivity evaluation is the further extension of agricultural land classification. This paper offered to capacity assessment, environmental health assessment as the main factors, wholesome elements and ecological potential risk factors as the secondary factors for supporting a comprehensive evaluation of agricultural land to build green production evaluation system for agricultural land based on the results of agricultural land classification and geochemical soil quality assessment. Finally, this paper achieved green productivity evaluation of agricultural land and defined the area of green production by taking a case study on four counties (cities) in the western of Jilin Province. The results show that the overall quality of agricultural land is good, 99.94% for the green farmland, where the green high-yield area is mainly distributed in eastern and northern regions of the Qianguo County; Wholesome elements are rich in the southern of Zhenlai County and northern part of Qianguo County, lack in the north of Da’an County and southwest of Qianguo County; There is potential risk for agricultural land in the east of Qianguo County, accounting for 1.5% of the total area.