浙中氟石矿地区耕地土壤-农作物中氟含量分析研究

调查高氟地区土壤环境中氟和主要农作物氟富集现状,研究二者之间的联系规律,对保障农产品质量安全有主要现实意义。基于浙江中部氟石矿地区耕地耕作层土壤中的氟含量分析,以及与立地土壤相对应的农作物中含氟量检测,调查区域耕作层土壤中氟含量平均值在485～772mg/kg,作物中含氟量在0.05～2.98mg/kg;区内稻米、油菜籽样品中含氟量超过1.0mg/kg的比例分别为58.3%和30.0%,水果、蔬菜的可食部分含氟量均低于1.0mg/kg。研究表明,作物中的氟富集主要来自土壤环境氟,粮油作物对土壤氟的吸收富集能力强,其氟含量与土壤氟含量之间呈现显著的正相关性。研究结果对高氟地区调整农业种植方式有指导意义。

An Evaluation on Total Fluorine Contents in Surface Soils and Crops in Fluorite Mining Area,Central Zhejiang Province

There was a significance to guarantee the quality and safety of agricultural products, when learning correlations between fluorine contents in surface soils and crops around fluorite-rech area. Fluorine contents were analyzed in surface farm-soils and crops in fluorite mining area located in the central Zhejiang Province. It was found that average total fluorite contents ranged from 485 to 772 mg/kg in soils and 0.05 to 2.98 mg/kg in crops. The over-standard rate of F in rice and rapeseed sample were 58.3 and 30.0 per cent respectively, while fluorite contents in fruit and vegetables below 1.0mg/kg. It was found that the cause of fluorite in crops was soil fluorine. The absorption and accumulation of fluorite in rice and rapeseed were stronger that in fruit and vegetables. There was a significant correlation between the content of total fluorine in rice or rapeseed and that in the soil. The result provided a theoretical basis for the adjustment of planting pattern.