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利用云杉各种源幼苗在物候适应性方面表现出的差异 ,掌握各种源对环境因子的敏感反应 ,从而作出种源选择 ,为林木良种化收集原始资料并提供科学依据。
Based on the differences in phenological adaptability of spruce seedlings from different sources, we can grasp the sensitive responses of various sources to environmental factors and make the provenance selection. We can collect the original data and provide the scientific basis for the improvement of tree species.