【摘要】 在¹⁴CO₂饲喂植物叶片后,以CaSO₄（Dy）-TEFLON热释光片,贴于饲喂叶片上检测0.5至1小时,用圆产FJ-377热释光剂量仪（北京核仪器厂）读取TL值（热释光读数值）,说明热释光片对¹⁴C释放的β能量具有一定响应性。使用FJ-377热释光剂量仪时,热释光片以φ5.5×0.4mm的检测效果优于φ8.0×0.5mm。热释光剂量测定法（TLD）的检测与液闪法测定比较,两者结果一致,TL值与dpm/cm₂呈极显著相关（r=0.94,P<0.01）。取大豆、葡萄为材料,经多次连续检测TL值,观察TL值下降（或递增）百分率以估计¹⁴C同化物的输出与输入情况。实践证明,应用TLD较液闪法简便、快速,适于在田间活体植株上多点测试。更多还原

【Abstract】 There was a response of thermoluminecence dosimetry （TLD） discs to ¹⁴C radiation energy released from ¹⁴CO₂ assimilates in leaves. The thermoluminescence dosimetry dises, CaSO₄（Dy）-TEFLON discs,were prepared by Atomie Energy Research Institute, Chinese Academy of Agricultural Sciences. The discs were put on the blade for30 to 60minutes which was fed with ¹⁴CO₂. The thermolumineeenee values （TL values） appeared with thermoluminescence measuring instrument （Model FJ-377, made in China）. There were two types of TLD discs, φ5.5×0.4 and φ8.0×0.5mm. As to effect, the former is better than the latter. The results measured by TLD method showed no difference as compared with those measured by scintilation counter method. There was a high significant positive correlation between TL value and dpm/cm², r=0.94, P<0.01. TLD was used to measure the TL value in soybean and grape leaves at regullar intervals, then to calculate their thermolumineseence attenuation rate and increasing rate. These were good indies to express transportation of ¹⁴C assimilates （import or export）.Clearly, TLD is a simple, rapid and widely used method. It is suitable for measuring many samples with intacted leaves in vivo both in the laboratory and in the field.更多还原