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〔摘要〕根据在吉林省辉南森林经营局四岔林场9年的种源试验,经过秩次相关等一系列分析表明,对大青杨进行早期选择不宜早于第5年,从第7年开始较为稳妥。
〔Abstract〕 Based on 9-year provenance experiment in Four Forks Forest Farm of Huinan Forest Management Bureau of Jilin Province, through a series of rank correlation analysis, it shows that the early selection of Populus euphratica should not be earlier than the fifth year and the seventh year Start more secure.