商洛连翘种子品质检验与质量标准研究

摘要

为了建立商洛连翘种子质量分级标准，以便控制其质量，规范种子供需市场，采用连翘种子检验方法，测定不同来源连翘种子的发芽率、千粒重、净度、含水量和生活力等指标，结果表明：商洛地区连翘种子的净重为50％～58％，平均值为48．35％；千粒重为2．7244～2．8312 g，平均值为2．7687 g；含水量为5．69％～6．37％，平均值为6．12％；发芽率为26．69％～50．00％，平均值为42．0％；5 d内的发芽势为0～20％，平均值为8％。种子的颜色为褐色和黑色2种，其中以褐色种子为佳。根据K类中心聚类分析结果，最终确定了以发芽率和千粒重2项指标为主要标指，以净度和含水量为参考指标的4项指标3个等级的连翘种子质量分级标准，分为1、2、3三个等级。%So as to establish the quality grading standard of Forsythia suspensa seeds in Shangluo, and to control the seed quali-ty and manage the seed market of this species, we measured the germination rate, 1000-grain weight, cleanliness, moisture con-tent and viability of forsythia seeds with different sources.The results showed that: in Shangluo area, the net weight of forsythia seeds was 50%~58%with the average value of 48.35%;the 1000-grain weight was 2.7244~2.8312 g with the average value of 2.7687 g;the moisture content varied from 5.69% to 6.37%, and its average value was 6.12%; the germination rate changed from 26.69%to 50.00%with the average value of 42.0%;the germination potential within 5 days was 0%~20%, and its average value was 8%.The seeds of Forsythia suspensa were brown or black, and the brown seeds were better.According to the results of K-class-center clustering analysis, the author established the quality grading standard of Forsythia suspensa seeds.This standard used germination rate and 1000-grain weight as main indexes, and used cleanliness and moisture content as reference indexes;it included 4 indexes, and divided the quality of forsythia seeds into 3 grades.