一、看色泽和光洁度。一般来说,新种子表面油亮,富有光泽,蜡质感较强,如豆类、瓜果类、葱韭类等种子。二、研试种仁油质大小。将种壳剥去,用大拇指研试种仁,油质感强者为新种,差者为陈种,甘蓝类、葱韭类等种子可直接研试。三、咀嚼式尝试。将葱韭类种子直接放入口内,慢慢咀嚼,味浓者可判为新种,味淡者或无味者就值得怀疑。 First, look at the color and finish. In general, the new seed surface shiny, shiny, waxy texture, such as beans, fruits, onion leeks and other seeds. Second, research seed kernel size. The shell is stripped, with the thumb to test the seed kernel, strong oil texture for the new species, poor for the Chen species, cabbage, onion leek and other seeds can be directly tested. Third, chewing type try. Onion leek seeds directly into the mouth, slowly chewing, thick condemned may be sentenced to new species, light or tasteless is questionable.