X射线水衬比法测定云南松种子生活力

STUDIES ON XRAY CONTRAST METHOD WITH WATER FOR TESTING VIABILITY OF YUNNAN PINE SEED

Ｘ射线水衬比法测定云南松种子生活力沈永宝喻方圆高捍东（林业部南方林木种子检验中心南京２１００３７）金天喜曾宪志（贵州省林业厅林木种苗管理站贵阳５５０００１）关键词云南松种子，生活力，ｘ射线水衬比云南松（ＰｉｎｕｓＹｕｎｎａｎｅｎｓｉｓＦｒａｎｃｈ）...

This paper studies a method to test the seed viability of Yunnan pine (Pinus Yunnanensis Franch) by the radiography with water as contrast agent. The results showed that the method can be used for rapidly testing seed viability in accordance with its germination percentage. The suitable procedure is as follows: The seeds were dried in a drier(30℃) with silica gel(SiO2) for 55 hours after the seeds were soaked in water(25℃) for 24 hours and put on a germination medium for 24 hours. The internal structure of viable seeds can t been seen on its picture or slightly seen. Based on these dead seeds and viable seeds can be determined easily.