橡胶“三合树”俗称“冠接树”,是经过选择的树冠、茎干、砧木三种不同品系,通过二次芽接而组成三合型的橡胶树.它是根据无性繁殖遗传的原理来培育的,所以能综合利用冠、茎、砧三品系的优良性状,克服三品系的弱点,可按人们的愿望扬长避短,发挥品系的优势,因而也称为“理想芽接树”. Rubber “triple tree” commonly known as “crown tree” is the choice of the crown, stem, rootstock three different strains, through secondary budding and form a triple type of rubber tree. It is based on the principle of asexual breeding to nurture Therefore, it can comprehensively utilize the excellent traits of the three varieties of crown, stem and anvil to overcome the weaknesses of the three strains, and can be based on people’s wishes to avoid weaknesses and bring into play the superiority of the strains. Therefore, it is also called “ideal budding tree.”