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以樱花嫁接苗地径、苗高2个性状作为分级指标,对宁波市四明山区域1年生和2年生的樱花嫁接苗进行机械随机抽样调查,运用数理统计和聚类分析的方法对樱花嫁接苗进行分类,同时结合宁波市四明山区域的生产实践对统计分析结果进行调整,从而得出宁波市樱花嫁接苗的分级标准。
The cherry tree grafted seedling diameter and seedling height were used as the grading index to conduct the mechanical random sampling of cherry grafted seedlings of one-year and two-year-olds in the area of Siming Mountain in Ningbo City. The grafted seedlings of cherry were studied by using mathematical statistics and cluster analysis Classify, at the same time, combine with the production practice in the area of Siming Mountain in Ningbo to adjust the statistical analysis results, so as to draw the grading standards of cherry grafted seedlings in Ningbo City.