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揭示碘的环境与生物地球化学行为对建立人体科学补碘方法具有关键性意义.在盆栽和模拟条件下,应用同位素(125I)示踪技术,通过淋溶试验和青菜吸收碘的实验,在系统研究碘的生物地球化学转移特征及其影响因素的基础上,建立了碘生物地球化学迁移的定量模式.结果表明:作物可以吸收土壤外源碘,并通过根系将大部分碘输送到茎和叶,作物吸收碘的程度除了受土壤外源碘含量的控制外,还受土壤对碘吸附能力的影响;土壤中碘的淋失量大小决定于土壤对碘的固定能力以及淋溶液的酸碱度,而与淋溶水量的大小无关;土壤和植株中的部分碘可以挥发释放到空气中去,土壤和植株的含碘量越高,碘的释放量也就越大,这些研究结果为开辟生产化防治碘缺乏病(IDD)的新途径提供了重要的科学依据.
Reveal the environmental and biogeochemical behavior of iodine is crucial to the establishment of human science iodization method.Using isotope (125I) tracing technique and the experiments of iodine absorption by cabbage and pot experiment under pot and simulated conditions, Based on the study of biogeochemical transfer of iodine and its influencing factors, a quantitative model of iodine biogeochemical migration was established.The results showed that crops can absorb exogenous iodine in soil and transport most of the iodine to stems and leaves , The degree of iodine absorption in crops is controlled by the exogenous iodine content in the soil, but also affected by the soil’s ability to adsorb iodine. The leaching amount of iodine in the soil depends on the ability of the soil to fix iodine and the pH of the leaching solution And the amount of leaching water has nothing to do; part of the soil and plant iodine can be volatile release to the air, soil and plant iodine content is higher, the greater the amount of iodine release, the results of these studies to open up production control A new scientific basis for iodine deficiency disorders (IDDs) provides an important scientific basis.