Effects of Stump Height on the Sprouting Regeneration of Archidendron clypearia Medicinal Plantation

To study the effects of different stump heights on sprouting regeneration and biomass production of Archidendron clypearia medicinal plantation.Four stump heights of 30,60,90 and 120 cm,plus a treatment of debranching with keeping top shoot and a treatment of debranching with topping as the cross-reference,were employed in the felling experiment for a 480 d plantation of A.clypearia,and the percentages of stumps sprouting and survival,and number,length and biomass of sprouts per stump were determined.The cutting pile height of 120 cm has the largest number of germination points and sprouting shoots,and the cutting pile height of 90 cm has the largest sprouting length and sprouting biomass.Stump heights had no significant effects on the percentages of stumps sprouting and survival,but significantly affected the number of bud emergence points,and number,base diameter,length and biomass of sprouts,which showed a trend of increasing first then decreasing with the increasing stump heights.90 cm and 120 cm stumps showed an optimal yielded in terms of number,diameter,length and biomass of sprouts per stump.90~120 cm of stump heights can be considered as optimal in felling A.clypearia medicinal plantation with the expectation of harvesting a higher biomass production of sprouts.