1 “GB”与“DB”的分级依据“GB”中规定:粮食、蔬菜种子分级以品种纯度、净度、发芽率为分级依据,其中品种纯度为主要定级标准。凡净度、发芽率两项中的一项比品种纯度级别低一级;两项中无论一项或两项高于品种纯度级别的都按品种纯度等级定级。凡净度、发芽率两项都比品种纯度级别低一级;两项中的一项与品种纯度同级, Grading of GB / D and DB The classification of grain and vegetable seeds is based on the classification of purity, clarity and germination rate of seeds, of which the purity of varieties is the main grading standard. Where the clarity, germination rate of one of the two varieties lower than the purity level of one; two or two higher than the purity level are species purity grade rating. Where the clarity, the germination rate of two varieties lower than the purity level of one; two of the same species purity and variety,