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对美洲黑杨和欧美杨及其杂种营造的7年生丰产林调查分析结果说明,用多品系造林,并在造林中不断筛选优良无性系,可提高林分生产力,可防止树种(品系) 单一给造林带来的不良后果。
The results of a survey of 7-year-old high-yield forests created by Populus nigra and Populus euphratica and their hybrids show that using multiple-line afforestation and screening fine clones continually in afforestation can improve stand productivity and prevent single species Afforestation adverse consequences.