用分类树模型分析健康的相关因素。
Classification tree model was used to explore health-related factors.
胸径、树高的早-晚相关十分紧密，且这种相关关系主要受遗传因素制约；
The age age phenotypic and genetic correlations for DBH, height were very high, indicating that these relationships were mainly controlled by genetic factors.
油松的树高与叶片长度并无显著的相关关系，因为油松树高、针叶长分别受到不同的遗传因素的控制。
Tree Height doesn't has significant relationship with blade length, for they are controlled by different genetic factors.
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