Quality test and quality grading standard for Forsythia suspensa seeds
Objective To establish a method for quality inspection of Forsythia suspensa seeds and corresponding quality grading standards.Methods By measuring the vitality,purity,germination rate,moisture content,thousand grain weight,morphology and other indicators of Forsythia suspensa seeds from different producing areas,quality of 16 samples from the main producing areas of Forsythia suspensa in China was tested.The data were analyzed by K-means clustering analysis with SPSS software to formulate quality grading standards for Forsythia suspensa seeds.Results Grade one Forsythia suspensa seeds were black-brown,round and full,with a purity≥90%,thousand grain weight≥3.2 g,moisture content≤6.2%,vitality≥85%and germination rate≥85%.Grade two seeds were brown,relatively full,with a purity≥75%,thousand grain weight≥2.7 g,moisture content≤5.5%,vitality≥65%and germination rate≥60%.Grade three seeds were yellow-brown,shrunken,with a purity≥40%,thousand grain weight≥2.2 g,moisture content≤4.3%,vitality≥45%and germination rate≥35%.Conclusion Quality grading standards for Forsythia suspensa seeds have been established,providing reference and guidance for the evaluation and artificial cultivation of Forsythia suspensa seeds.
Forsythia suspensa seedquality inspectionquality grading standard
万方数据
维普
