【摘要】 TO在土壤 玉米系统中迁移、运输动态过程的研究表明 :引入土壤中的HTO不仅在系统各部分间转移和分配 ,而且迅速向系统外散逸 ;HTO中的氚以自由水氚和结合态氚形态存在于玉米植株和土壤中 ;植株中的自由水氚比活度于引入后 6h时达最大值 ,随后逐渐下降 ,而结合态氚呈缓慢增加 ;根中的HTO比活度开始时高于地上部 ,而后趋于平衡 ,表层土中两种形态氚基本呈逐渐下降趋势更多还原

【Abstract】 The dynamic processes of movement and transportation of HTO in the soil maize system were investigated. The results showed that when HTO entered the soil, it not only transferred to other parts of the system, but also vaporized into atmosphere rapidly. Both free water tritium and bound tritium were found in the maize and the soil. The activity ratio of free water tritium reduced after reaching the maximum at 6th hour in the maize and that of the bound tritium increased slowly. The activity ratio of HTO in maize root was higher than those in upper\|ground parts at the beginning and reached equipoise later. The activity ratio of two kinds of tritium in the surface soil reduced continuously.更多还原