Factors affecting the cesium transfer factor to shiitake (Lentinula edodes) cultivated in sawdust medium
Factors affecting the cesium transfer factor to shiitake (Lentinula edodes) cultivated in sawdust medium
复制标题
DOI：
10.1186/s10086-021-01949-9
复制
发表时间：
2021-02-18
影响因子：
2.9
通讯作者：
Hiraide, Masakazu
中科院分区：
文献类型：
--
作者：
Hiraide, Masakazu
放射性铯 137 (Cs-137) 到在床原木上栽培的香菇 (Lentinula edodes) 的转移因子 (TF) 差异很大。因此，本研究以稳定铯133（Cs-133）和含5%米糠的锯末培养基为模型，研究了影响TF的因素，其与床木栽培具有相似的Cs-133 TF。结果发现，模型锯末培养基中的 Cs 浓度和营养物浓度（以氮浓度表示）与 TF 相关。此外，在原木培养和模型锯末培养基培养中，使用总Cs-137和Cs-133浓度计算的TF存在差异，而在锯末培养基培养中，使用交换性Cs-137和Cs-133浓度计算的TF相同，表明培养基中的交换性Cs是子实体Cs的来源，而前者的差异是由于存在其他不能被吸收的Cs化学形态所致。蘑菇农场中 TF 的目的之一是确定苗圃栽培开始时子实体 Cs-137 浓度，因此考虑树木中 Cs-137 浓度的未来变化，讨论 TF 的预测方法。
The transfer factor (TF) of radioactive cesium-137 (Cs-137) to shiitake (Lentinula edodes) cultivated on bed logs varies greatly. Therefore, the present study investigated which factors affect the TF using stable cesium-133 (Cs-133) and sawdust medium with 5% rice bran as a model, which had similar Cs-133 TFs to bed-log cultivation. It was found that the Cs concentration and nutrient concentration (represented by the nitrogen concentration) concerned with the TF in the model sawdust medium. In addition, the TFs calculated using total Cs-137 and Cs-133 concentrations differed in both bed-log cultivation and the model sawdust medium cultivation, while the TFs calculated using exchangeable Cs-137 and Cs-133 concentrations were the same in sawdust medium cultivation, indicating that exchangeable Cs in the medium is the source of Cs for the fruiting body and the former difference was due to the presence of other chemical speciation of Cs that could not be absorbed. One purpose of the TF on the mushroom farm is to determine the fruiting body Cs-137 concentration at the start of bed-log cultivation, therefore the prediction method of TF are discussed considering the future changes of Cs-137 concentrations in trees.