The variance analysis shows there is extreme significant difference in seedling height, ground diameter, branching height, freeze injury among provenances;
方差分析表明，樟树苗期种源间在苗高、地径、分枝高、冻害上有极显著差异；
For all poplar clones, annual growth rhythm accorded with "S" curve both in seedling height and ground diameter.
地径和苗高年生长节律表现为慢-快-慢的“S”型生长规律。
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