SUITABILITY EVALUATION OF AGRICULTURAL LAND BASED ON LAND TYPE IN THE XIXIA COUNTY
Agricultural land is the key resource and environmental factor for human survival and development,with the core function of ensuring human livelihood and food safety.Land types reflect the homogeneity of physical geographical features.To protect agricultural land and implement the requirements of"farming should be cultivated when the land is appropriate".It is necessary to conduct the suitability evaluation of agricultural land,optimize the agricultural land layout,and gradually realize the transformation from grain security to food security.Firstly,based on the three-level classification framework of land types in Xixia county,land types were divided by the top-down superposition method and bottom-up consolidation method.Secondly,taking the smallest unit of land type as the evaluation unit,the suitability evaluation system integrating natural conditions,socioeconomic factors,and ecological indicators for cultivated land,garden land,and woodland was established respectively.Finally,the AHP method and the weighted summation method were used to evaluate the suitability of various agricultural land in Xixia county.The results showed that there were three levels of land types in Xixia county,including 14 land classes,299 land subclasses,and 570 land units.More than 86％of Xixia county was suitable for woodland,about 47％was suitable for garden land,and only 13％was suitable for arable land.The highly suitable areas(Sl)of all kinds of agricultural land were mainly distributed in the southern river valley area of the study area.The barely suitable areas(S3)of all kinds of agricultural land were not evenly distributed in space,and most of the mountainous regions of the northern part of the study area were not suitable(N)for cultivated land.Therefeore,suitability evaluation based on land type can identify potentially suitable land for agricultural use and provide references for agricultural land layout optimization.It also plays an important role in the realization of regional food security from the perspective of the"big food view",and can be promoted at the county level.
land type divisionsuitability evaluationagricultural landFuniu Mountain arealayout optimization
万方数据
维普
