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对温地松种子进行对比射线方法检验,结果表明,其最佳x射线摄影衬比过程为:将种子在25℃下浸种24h,擦干种子表面水分后,置入40%KI溶液中处理5h,在流水中冲洗5～6min,置于70℃下干燥24h。使用SOⅡ胶片和HY—35型射线机时,拍摄条件为:电压20kV,电流4mA,曝光时间100s,焦片距25cm。由此认为,未被浸渗而胚和胚乳发育良好的种子具生活力,可用来估算种子的发芽能力。用上述衬比方法测定35份湿地松种子,其发芽能力与实际发芽率相当一致。
Contrasting radiographic tests on Pinus thunbergii seeds, the results showed that the optimum contrast process of x-ray photography was as follows: the seeds were soaked at 25 ℃ for 24 h, the surface water of the seeds was dried, then put into 40% KI solution for 5 h , Rinsed 5 ~ 6min in running water, placed at 70 ℃ for 24 hours. The use of SO Ⅱ film and HY-35-ray machine, the shooting conditions are: voltage 20kV, current 4mA, exposure time 100s, focal length 25cm. From this, it is considered that seeds which have not been infiltrated and in which germ and endosperm are well-developed have viability and can be used to estimate seed germination ability. Using the above contrast method to determine 35 parts of pine seeds, its germination ability and the actual germination rate are quite consistent.