【摘要】 用HY—35型软X射线仪对杉木、马尾松、柳杉种子进行摄影,确定各树种种子X光片的判读等级,对照各树种等级标准,判读出各级的粒数百分率,从而估算出杉木、马尾松和柳杉等种子发芽率。更多还原

【Abstract】 Taking photographs of seed of China fir and Pinus massoniana and Japamcedar by Hy-35 X-ray apparatus, the film grade of every apecieswas defined, and according to the standard of grade of every species, the perentage of grade of every species was determined. As a result, their germination percent was estimated.更多还原