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对渭北刺槐人工林无性更新萌芽与根蘖发生规律调查研究表明：萌芽数量及幼树生长量随伐桩直径增加而增大；伐桩上萌条分布在０～８ｃｍ范围内，集中分布在距地面０～２ｃｍ内，靠坡下方多于坡上方，每伐桩平均萌条７．７株；萌条有效株生长量，在距地面２．１～４．０ｃｍ范围内，以４～６株丛生的生长快；根蘖幼树主要发生在０～７ｃｍ深土层中直径０．７１～１．４ｃｍ粗的水平母根上，伐桩四周０．５１～１．５０ｍ范围内是根蘖幼树集中分布区．靠坡下方多于坡上方；萌芽幼树比根蘖幼树生长快、整齐，但更新频度只有根蘖幼树的２／５．刺槐人工林无性更新、改造应二者相结合，以萌芽更新为主、根蘖更新为辅。
The investigation of germination and root tillering of vegetative regeneration of Robinia pseudoacacia plantation in Weibei showed that the number of germination and the growth of young tree increased with the increase of the diameter of stump. The sprout distribution of stump in pile was in the range of 0 ~ 8cm, From the ground 0 ~ 2cm, more than the bottom of the slope above the slope, pile per pile average of 7.7 strains of adventitious buds; effective growth of sprouts, in the range of 2.1 ~ 4.0cm from the ground, with 4-6 Strains grew fast; rooting tillers mainly occurred in 0 ~ 7cm deep soil with a diameter of 0.71 ~ 1.4cm thick horizontal root, the thickness of 0.51 ~ 1.50m around the pile is the root tillering Tree concentrated distribution area. More than the bottom of the slope above the slope; young sprouts saplings than young growth, neat, but the frequency of updates of young tillers only 2/5. Robinia pseudoacacia plantation asexual update, the transformation should be a combination of the two, with the main sprout regeneration, root tiller update supplemented.