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应用权重系数法和灰色关联度法对176份彩叶凤梨种质资源进行了观赏性评价,评价表明,其中24份资源两种方法评价观赏性均优良,可供生产上直接利用;两种方法都能较好地评价彩叶凤梨的观赏性,两法评价的相关系数为0.896 7**。相比较,权重系数法受主观影响大些,计算简单,但权重系数确定较繁琐;灰色关联度法比较客观,实用性较强。如结合两法的长处,采用加权关联度法,评价应更为合理。
The ornamental evaluation was carried out on 176 germplasm resources of Panax magnoliae by using the weight coefficient method and the gray relational degree method. The evaluation showed that 24 of these methods were both excellent in ornamental evaluation and could be used directly in production. The two methods Can better evaluate the ornamental color pineapple, the correlation coefficient of the two methods of evaluation is 0.896 7 **. In contrast, the weight coefficient method is more subjectively influenced, the calculation is simple, but the weight coefficient is more complicated to determine; the gray relational degree method is objective and practical. Such as the combination of the strengths of the two methods, the use of weighted correlation method, the evaluation should be more reasonable.