中文关键词Cd富集系数生物有效性影响因素农产品质量 英文关键词Cdenrichment factorbioavailabilityinfluencing factorsquality of agricultural products

作者	单位	E-mail
王锐	重庆市地质矿产勘查开发局川东南地质大队, 重庆 400038 重庆市土地质量地质调查重点实验室, 重庆 400038	1372661182@qq.com
胡小兰	重庆市地质矿产勘查开发局川东南地质大队, 重庆 400038
张永文	重庆市地质矿产勘查开发局川东南地质大队, 重庆 400038 重庆市土地质量地质调查重点实验室, 重庆 400038
余飞	重庆市地质矿产勘查开发局川东南地质大队, 重庆 400038 重庆市土地质量地质调查重点实验室, 重庆 400038
朱海山	重庆市地质矿产勘查开发局川东南地质大队, 重庆 400038 重庆市土地质量地质调查重点实验室, 重庆 400038
李瑜	重庆市地质矿产勘查开发局川东南地质大队, 重庆 400038 重庆市土地质量地质调查重点实验室, 重庆 400038

中文摘要 选择在重庆南川区采集大宗农作物水稻及根系土样品155件，另采集部分玉米、土豆、番茄、油菜、李子和猕猴桃及根系土样品进行测试分析，以生物富集系数表征元素的生物有效性，分析土壤理化性质、土壤组分、地质背景及作物种类等因素对Cd生物有效性的影响.结果表明，南川区水稻及根系土中均存在一定程度的Cd超标现象，且Cd生物有效性相对较低；土壤酸碱度为Cd生物有效性的主要控制因素，酸性条件下生物有效性更高；番茄、李子和猕猴桃对Cd的富集能力较弱.因此，可通过人工调控田块酸碱度或调整种植结构等手段预防土壤重金属污染、提高农产品质量.该方法亦可用于其它土壤重金属或Se等健康元素的相关研究，为土地安全利用、高品质农产品的生产提供科学依据. 英文摘要 One-hundred and fifty five large-scale crop rice and root soil samples were collected in Nanchuan District of Chongqing, and some samples of corn, potato, tomato, rapeseed, plum and kiwifruit, and root soil were collected for testing and analysis. The bioavailability of the elements was characterized by bioconcentration factors. The effects of soil physical and chemical properties, soil composition, geological background, and crop types on the bioavailability of Cd were analyzed. The results showed that there was a certain degree of Cd exceeding the standard in rice and root soil in Nanchuan District, and the bioavailability of Cd was relatively low. Soil pH was the main controlling factor of Cd bioavailability, and the bioavailability was higher under acidic conditions. Plum, kiwi, and kiwifruit have weaker ability to enrich Cd. Therefore, it is possible to prevent heavy metal pollution in the soil and improve the quality of agricultural products by artificially regulating the pH of the field or adjusting the planting structure. The method can also be applied to the research of other soil heavy metals or health elements such as Se and provides a scientific basis for the safe use of land and the production of high-quality agricultural products.

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