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为了给刺槐人工林定量间伐提供科学的依据,以减少定性间伐的盲目性,笔者对永寿县槐平林场的3166.7公顷刺槐人工林进行了全面调查,试图通过胸径和冠幅的相关关系,来确定刺槐人工林在不同经营水平上的密度。1.资料来源在全面调查的基础上,按照不同立地条件类型,选择林龄8—22年、郁闭度0.7—
In order to provide a scientific basis for the quantitative thinning of Robinia pseudoacacia plantations and to reduce the blindness of qualitative thinning, the author conducted a comprehensive survey of 3166.7 hectare Robinia pseudoacacia plantations in the Huaping Forest Farm of Yongshou County, trying to determine the correlation between DBH and crown width Acacia plantation at different management levels of density. 1. Source of information Based on a comprehensive survey, according to different types of site conditions, choose the age of 8-22 years, canopy density 0.7-