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利用灰色关联度法对油脂植物的主要性状进行综合分析,为评价及筛选优质非粮柴油植物提供科学参考。本研究选取9项评价指标并运用独立性权数法确定了其权重系数,总体变幅为0.085～0.186,其中碘值(0.136)与高热值(0.120)的权重较高,其余7项指标间差异不大。以秦岭地区23份符合柴油植物初步评价标准的野生资源为材料,分别利用等权关联度法与加权关联度法确定其与构建的理想物种间的关联度,并用于综合评价与筛选。结果表明:基于等权法的关联度变幅为0.906 5～0.985 1,前三名优势物种为山桃(γ=0.985 1)、粗榧(γ=0.984 2)与李(γ=0.983 9);基于加权法的关联度变幅为0.912 6～0.984 9,前三名优势物种为山桃(γ=0.984 9)、李(γ=0.983 9)与粗榧(γ=0.983 7)。基于两种评价方法下的23份资源综合品质排名差异不显著(P<0.01),其秩相关系数达到0.998,说明所选9项指标对评价非粮柴油植物综合品质具有同等重要性,同时也表明等权关联度法可直接用于评价与筛选。
The gray relational degree method was used to make a comprehensive analysis of the main characters of oil and fat plants and provide scientific reference for the evaluation and screening of high quality non-grain diesel oil plants. In this study, nine indexes were selected and their weight coefficients were determined by using the independent weight method. The overall variation ranged from 0.085 to 0.186, among which the weight of iodine value (0.136) and high calorific value (0.120) were higher, and the other seven indicators Little difference. Based on the 23 wild resources in QINLING area that accord with the preliminary evaluation criteria of diesel oil plants, the correlation between them and the ideal species was determined by using the method of equal weight correlation and weighted correlation, respectively, and used for comprehensive evaluation and screening. The results showed that the correlation coefficient was 0.906 5 ~ 0.985 1 based on the equal weight method. The top three dominant species were Peach (γ = 0.985 1), Rough (= = 0.984 2) and Lee (γ = 0.983 9); The coefficient of variation of the correlation degree based on the weighting method was 0.912 6 ~ 0.984 9. The top three dominant species were Peach (γ = 0.984 9), Lee (γ = 0.983 9) and Rough (= = 0.983 7). Based on the two evaluation methods, the comprehensive quality rankings of 23 resources were not significantly different (P <0.01), and the rank correlation coefficient reached 0.998, indicating that the 9 indicators selected were equally important for evaluating the comprehensive quality of non-grain diesel oil plants, It shows that the method of equal relation can be directly used in evaluation and screening.