基于可变模糊集合理论的农业生态环境评估系统研究

Research on Agricultural Ecological Environment Assessment System Based on Variable Fuzzy Set Theory

摘要: 为缓解水资源短缺，发挥区域耕地资源优势，国家在东北四省区推行了“节水增粮行动”。但开展以地下水为主要水源的大范围的膜下滴灌将对区域的土壤、社会、生态和水环境产生何种影响，是社会普遍关注的热点问题。本文结合国家的“节水增粮行动”，应用可变模糊集合理论，以辽宁省建平县昌隆示范区为例，对水、土壤、社会和生态环境进行了综合评价。结果表明，由于膜下滴灌会降低农药和化肥使用量，降低对土壤和水环境的污染，较原来管灌对农业生态环境影响降低1级，但需要覆膜，地膜回收率最高可达到90%左右，从长期看，随着地膜使用量的增加，残留量也将随之增加，具体影响仍需长期定位观测。

Abstract: In order to alleviate water resources shortage and to play land resources’ advantages, our country implements “water saving and grain increasing action” in the four provinces of the northeast. But what’re the impacts on region’s soil, society, ecology and water environment to carry out a large range of groundwater as the main water source of the drip irrigation is a hot issue. In this paper, a comprehensive evaluation of water, soil, social and ecological environment in Jianping of Liaoning province was made based on variable fuzzy set theory. The results show that drip irrigation will reduce pesticide and fertilizer, and reduce soil and water environment pollution compared with pipe irrigation on agricultural ecological environment, level 1 lower than pipe irrigation. But drip irrigation needs to be covered with plastic film, and plastic recycling rate reached about 90 percent. In a long term, the remaining quantity will increase with the film content increasing, but the specific effects still need long-term observation.