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目的 了解自 1992～ 2 0 0 0年间在新疆和田县朗如乡、巴格其镇、土沙拉乡和墨玉县扎瓦乡碘缺乏病严重流行区灌溉水加碘前后土壤碘含量。方法 对灌溉水加碘乡 (镇 )的农田土壤 ,采用随机抽样方法取样和用水溶解土壤 ,取上清液用砷—铈氧化还原法测定碘含量。结果 加碘后土碘含量较加碘前显著增加。朗如乡末次加碘后 4年土碘含量较加碘前增高 2倍 (P <0 .0 1)。巴格其镇加碘后 4年土壤碘含量高于加碘前 2～ 3倍 (P <0 .0 1) ,至第 5年 ,加碘后与加碘前无显著性差异 (P >0 .0 5 )。土沙拉乡加碘后 1年土壤碘含量高于加碘前 4～ 5倍 (P <0 .0 1) ;加碘后 2年与加碘前无显著性差异 (P >0 .0 5 ) ;重复加碘后土壤碘含量明显增加 (P <0 .0 1) ,2～ 3年后与加碘前无显著性差异 (P >0 .0 5 )。扎瓦乡加碘后土壤碘含量较加碘前增加 2倍 (P <0 .0 1) ,至加碘后 5年 ,土壤碘含量仍较加碘前明显增加 (P <0 .0 5 )。结论 灌溉水加碘是一种安全、经济、简便有效和居民乐于接受的补碘方法。
Objective To understand the soil iodine contents of irrigated water before and after iodized water irrigation in Langru Township, Baghqi Town, Tu Saqiang Township and Heyu County, Xinjiang Uygur Autonomous Region from 1992 to 2000. Methods Irrigated farmland soils were irrigated with water and sampled by random sampling method. Water was used to dissolve the soil. The supernatant was used to determine iodine content by arsenic-cerium redox method. The results after iodine soil iodine content increased significantly before iodization. The soil iodine content of Longruo township in the 4 years after the last iodine addition increased 2 times (P <0. 01) compared with that before iodine addition. Soil iodine content in Baghzi town four years after iodization was higher than that before iodization two to three times (P <0.01), and in the fifth year, there was no significant difference (P> 0) .0 5). The soil iodine content of soil salads at 1 year after iodine addition was 4 ~ 5 times higher than that before iodization (P <0 01). There was no significant difference between 2 years after iodine addition and before iodine addition (P 0 05) The iodine content of soil after repeated iodine addition increased significantly (P <0.01), but no significant difference (P> 0.05) between 2 and 3 years after iodine addition. The iodine content of soil in Zhawa township increased by two folds (P <0.01) before iodine addition, and the content of iodine in soil increased significantly (P <0. 05) . Conclusion Irrigation water iodine is a safe, economical, simple and effective and residents willing to accept iodine method.