铁树珠芽的产量很少,只有成年健壮的植株才能蘖生珠芽,每株也只有1～2个芽,不能大批繁殖。但用珠芽繁殖成活率较高,几乎是北方繁殖铁树的唯一方法。成年铁树基部蘖生的球形珠芽,大小如鸡蛋,坚实质硬。当珠芽依靠母树生长3年以上时,其基部已生有少量根系,此时采下成活率较高。如珠芽生长不到 Tiezhu bead bud production is very small, only adult robust plants tiller births pearl buds, each plant only 1 to 2 buds, can not breed. However, the higher survival rate of pearl bud propagation is almost the only way to breed iron tree in the north. Spherical basal tiller of adult iron tree bulbous sprout, the size of eggs, solid hard. When the pearl buds grow more than three years on the mother tree, the root has a small amount of root system, the survival rate is higher at this time. Such as the bud does not grow