The clinical date is analyed by t test and the ordinal date is analyed by two Independent Sample test.

临床资料采用t检验，等级资料采用秩和检验进行统计分析。

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Paired sample t test method was used to compare the difference between the two explants of the same trees. Independent sample t test method was used to determine the difference between the two groups.

用成对样本t检验法比较同一无性系内两种外植体的差异用成组样本t检验法比较两组无性系间的差异。

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