【摘要】 用HY—35型农用软x—射线仪对主要造林树种种子进行造影条件和各种衬比剂、衬比条件试验。以期探讨这些树种种子的造影最佳电压、电流和爆光时间以及适宜的衬比剂、衬比浓度和衬比时间。更多还原

【Abstract】 By using the Model Hy-35 soft X-ray instrument, the authors have carried out the scientific experiments on photo condition, contrast condition amd different kinds of contrast medium for the principal species of silviculture in order to probe into an optimum voltage, electric current, exposure time for photo, the suitable contrast medium, contrast concentration and contrast time for the seeds of tree species.更多还原