我们所于1964年开始引种国外松,经十多年来的观察,生长形势极好。但目前种源缺乏,为解决种源问题,我们于1972年进行了低接发根试验,采用髓心形成层对接法进行繁殖,发根率最高达93.3％,一般徘徊在40％左右。为摸清国外松低接发根的规律,找出影响 We started the introduction of foreign pine in 1964. After more than a decade of observation, the growth situation is excellent. However, at present, there is a lack of provenances. In order to solve the problem of provenance, we conducted a low-root-hair-root test in 1972 and used the medullary forming layer to replicate. The hair rooting rate was as high as 93.3% and generally hovered around 40%. In order to find out the rules of foreign loose roots, identify the impact