Horses are important food sources in several countries however, data on their radionuclide uptake is less available than for many other farm animals. Information on the transfer of artificial radioisotopes from the environment to the food supply is necessary for internal dose assessment and assuring the safety of the population relying on this food source. This study provides data for a less studied farm animal and, in the case of ²⁴¹Am and ^239+240Pu, relatively poorly studied radionuclides with respect to transfer to animal products. The transfer parameters for ^239+240Pu, ²⁴¹Am, ¹³⁷Cs and ⁹⁰Sr to the organs of 1-year old fillies, 10-year old mares and through the placental barrier into foetuses were quantified after 60-days feeding with contaminated soil or diet contaminated by a leachate solution. The transfer of radionuclides from ingested soil to tissues was generally lower, by up to three orders of magnitude, than from a diet contaminated by a leachate solution. The ingestion of soil is a particularly important source of radionuclide intake to grazing animals in the Semipalatinsk Test Site. For ²⁴¹Am there is a lack of available data, the two singular entries for mutton and beef in the IAEA handbook are higher than all values observed in the current study. The maximum observed transfer factor for ²⁴¹Am was 72 ± 22*10⁻⁵ d kg⁻¹ FW in the liver of the mare fed with leachate contaminated feed. For ^239+240Pu the maximum transfer factor was 31.8 ± 8*10⁻⁵ d kg⁻¹ FW observed also in the liver of the mare fed with leachate contaminated feed. The filly fed with leachate contaminated feed had the highest transfer parameter value for ¹³⁷Cs, 35.3*10⁻³ d kg⁻¹ FW. The highest ⁹⁰Sr transfer factor was found in the ribs of the filly fed leachate contaminated feed, 720 ± 144 *10⁻³ d kg⁻¹ FW. The results presented in this paper can be used to improve the current internal dose estimates from the ingestion of horse meat produced in the area, however they are based on a low sample size; future studies need to use a larger number of animals.

在一些国家，马是重要的食物来源，但是与许多其他农场动物相比，马的放射性核素吸收数据较少。关于内部放射性评估和确保依靠这种食物来源的人群安全的必要信息是有关从环境向食物供应源转移人工放射性同位素的信息。这项研究提供了研究较少的农场动物的数据，在²⁴¹ Am和^{239 + 240} Pu的情况下，就向动物产品转移的研究而言，研究相对较少的放射性核素。^{239 + 240} Pu，²⁴¹ Am，¹³⁷ Cs和⁹⁰的传输参数在饲喂受污染的土壤或受沥滤液溶液污染的饮食60天后，对1岁母马，10岁母马和通过胎盘屏障进入胎儿的器官进行定量。与被渗滤液溶液污染的饮食相比，放射性核素从摄入的土壤向组织的转移通常要低三个数量级。在塞米巴拉金斯克测试场中，土壤的摄入是放牧动物放射性核素的特别重要来源。对于²⁴¹ Am，缺乏可用数据，在IAEA手册中，羊肉和牛肉的两个单数比当前研究中观察到的所有值都高。²⁴¹ Am的最大观察到的传输因子为72±22 * 10 ^-5  d kg ^-1用渗滤液污染的饲料喂养母马肝脏中的FW。对于^{239 + 240} Pu ，在饲喂浸出液污染饲料的母马肝脏中也观察到最大转移因子为31.8±8 * 10 ^-5  d公斤^-1 FW。饲喂含沥滤液污染饲料的小母猪的最高传递参数值为¹³⁷ Cs，35.3 * 10 ^-3  d kg ^-1 FW。在充满浮游动物的沥滤液污染的饲料的肋骨中发现最高的⁹⁰ Sr传递因子，即720±144 * 10 ^-3  d kg ^-1FW。本文中提出的结果可用于通过摄入该地区生产的马肉来改进当前的内部剂量估计，但是这些估计是基于较低的样本量。未来的研究需要使用更多的动物。