一、基地自然生态条件必须选择符合无公害水稻产地环境条件质量标准(NY5116—2002)—空气质量、灌溉水质量、土壤环境质量指标的产区建立生产基地。1.空气条件:基地周围不得有大气污染,周围500米内无大气污染的企业。大气质量评价采用国家《大气环境质量标准》(GB3095—1996)所列的一级标准。主要评价因子包括总悬浮微粒(TSP)、二氧化硫 First, the base natural ecological conditions must be selected to meet the pollution-free rice origin environmental quality standards (NY5116-2002) - air quality, irrigation water quality, soil environmental quality indicators of production areas to establish production bases. 1. Air conditions: There must be no air pollution around the base, no air pollution within 500 meters around the enterprise. Air quality assessment using the national “Atmospheric Environmental Quality Standards” (GB3095-1996) listed a standard. The main evaluation factors include total aerosols (TSP), sulfur dioxide