直至目前,优良的橡胶无性系仍然难以同时具备高产、速生、抗性等综合性状.选择茁壮的砧木、高产的主干品系和抗性强的树冠品系,通过双重芽接的办法,把它们组成“三合树”。在灾害地区,经过较长时间的实践,证明三合树在生产上使用可能比一次芽接无性系具有更高的经济价值。进一步开展不同类型、不同组合的三合树的研究,对提高橡胶的抗灾能力,提高橡胶生产的经济效益,具有重要的作用。一、国内外三合树研究应用概况橡胶品种难以同时具备高产、速生、抗 Up to now, it is still difficult for excellent rubber clones to possess both high-yielding, fast-growing, resistant and other comprehensive traits. Choose robust rootstocks, high-yielding trunk lines and resistant crown-tree lines. Tree. " In disaster areas, after a long period of practice, it is proved that the use of Triptych in production may have higher economic value than that of primary budding clones. Further study on different types and different combinations of trigeminal trees will play an important role in improving the resilience of rubber and improving the economic benefits of rubber production. First, the domestic and international research and application of triptych Rubber varieties difficult to have both high yield, fast-growing, anti-