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无性系林业,已显示出巨大的增产潜力,正日趋成为林业经营的重要生产方式和林木良种化的主要途径。国外70年代在巴西和刚果每年培育近千万株桉树优良无性系造林,3年生树高超过20米,分别使每公顷木材年生长量由10～36m~3提高到40～64m~2。
Clonal forestry has shown great potential for increasing production and is increasingly becoming an important production method for forestry management and the main approach for improving seed quality. Nearly 10 million excellent eucalyptus clones are cultivated each year in Brazil and the Congo in foreign countries in the 1970s. The tree height of three-year-old trees exceeds 20 meters and the annual annual growth of timber per hectare is increased from 10 to 36 m 3 to 40 to 64 m 2.