【摘要】 茶树的不同品种及其不同器官对⁶⁰Coγ射线的反应不一。不同品种的种子经辐射后,除个别情况外,均随照射量的增加,始苗期推迟,出苗率降低,生长势减弱,茶籽的适宜照射量为4000—5000R,致死照射量一般为7000R 以上。插穗经辐照后,除个别情况外,随着照射量的增大,成活率降低,生长势减弱,插穗的适宜照射量为500—1000R,致死照射量为2000R。低照射量（4000R以下）辐射对花粉发芽有不同程度的促进作用,花粉的半致死照射量为12000R,致死照射量为20000R 以上。更多还原

【Abstract】 The seeds of different varieties of tea have been irradiated.In most cases the rate of emergence of seedings was delayed and the rate of emergence of seedlings was decreased with increasing the radiation doses.The more suitable doses for tea seeds were 5 krads,and the lethal dose is over 7 krads.Except the variety Fu Ding Da Bai,the survival rate of cuttings was decreased and its growth rate was reduced with increasing the radiation doses.The applica- ble dose and the lethal dose for cuttings were 0.5-1 krad and 2 krads respectively. Irradiation with tow dose(below 4 krads) give a good effect in the germination of pollen.The semi-lethal dose for pollen is 1.2 krads,and the lethal does is less than 20 krads.更多还原