黄河三角洲盐碱区耕地后备资源开发适宜性评价——以黄河岛为例

Evaluation on the Suitability for Cultivated Land Reserve Resources Development in Saline-AlkaliArea of Yellow River Delta——A case of the Huanghe Island

开发适宜性评价是耕地后备资源盐碱地开发的重要前提。以黄河三角洲典型盐碱地黄河岛为研究区,考虑盐碱地特性,构建了包括土壤、植被、生产条件、区位等4个一级因子,土壤全盐等11个二级因子的耕地开发适宜性评价指标体系,基于GIS平台,评价其开发适宜性。结果表明,黄河岛耕地开发适宜性可分为非常适宜、比较适宜、适宜、较不适宜、暂不适宜5个等级,其中适宜开发为耕地面积为14.25 km^2,占55.02%,适宜性水平整体呈现南高北低、西高东低的分布趋势。在评价基础上,提出了适宜开发区开展土地整治、选种耐盐作物,较不适宜和暂不适宜区适度开发或暂不开发、开展生态旅游等建议,保护和改善生态环境,促进土地可持续利用。研究结果可为黄河岛进行耕地开发提供依据。

Evaluation of development suitability is an important prerequisite for the development of saline-alkali land of cultivated land reserve resources.Taking the Huanghe Island,a typical saline-alkali land in the Yellow River Delta as the research area,considering the characteristics of the saline-alkali land,we constructed an evaluation index system of cultivated land development suitability,including 4 first-level factors such as soil,vegetation,production conditions and location,and 11 second-level factors such as total soil salt and evaluated its development suitability on the GIS platform.The results show that the suitability of cultivated land development in Huanghe Island can be divided into five grades:very suitable,more suitable,suitable,less suitable and temporarily unsuitable.Among them,the suitable cultivated area is 14.25 km^2,accounting for 55.02%,the overall suitability level shows the distribution trend of south high north low west high east low.On the basis of evaluation,the suitable development zones should carry out land consolidation,plant salt-tolerant crops,develop ecological tourism,develop or temporarily not develop the less suitable and unsuitable areas moderately to protect and improve the ecological environment for sustainable land use.The research results provide a basis for the development of cultivated land in Yellow River Island.