农业生态地质环境质量综合评价──以吉林省乾安县为例

Comprehensive Evaluation on the Agricultural Eco-Geological Environmental Quality As Example of Qian’an County in Jilin Province

乾安县是吉林省重要的粮食生产县之一。近３０年来，由于人口剧增，人为对农业资源的过量开发，导致干旱缺水，耕地碱化、贫瘠化和沙化，地氟病也十分严重，制约了农业的可持续发展。本文以农业生态环境地质的理论为基础，以系统论为指导，将该区的地质地貌作为一个大系统，该系统由水资源环境、土地资源环境、生物资源环境和农业社会环境４个子系统组成。进而，建立了农业生态地质环境质量评价的指标体系，并采用层次权重分析法和综合指数法进行了生态环境质量综合评价与分区。上述研究工作为保护治理生态环境、挖掘该区农业自然资源潜力。

Qian’an is one of the main grain production county in Jilin Province. In the past three decades, with the population explosion and overdevelopment to the agricultural resources, there are many environment problems, such as the water resource scarcity, alkalized, barren and sandy cultivated land, even the endemic fluorosis. These problems are very serious and restrain the agriculture sustainable development. Based on the agricultural eco-environmental geological theory,this paper regards the study area as a whole system, which consists of four subsystems of the water resource, land resource, living thing and social environment. In terms of it ,we set up an evaluated indicator hierarchy of the agricultural eco-geological environmental quality by the AHP method and the comprehensive evaluation is used by the comprehensive index method. According to the result, we have a classification of the quality and zone. It provides scientific basis for tapping the agricultural natural resource, and making programs for sustainable development. This method is significance to spread and utilize.