甘肃白水江自然保护区龙头箭竹1年生更新苗特征

Characteristics of 1-year-old Regeneration Seedlings of Fargesia dracocephala in Baishuijiang National Nature Reserve, Gansu Province

摘要: 为了揭示甘肃白水江自然保护区龙头箭竹（Fargesia dracocephala）开花后的更新及其更新苗生长特征，2019年9月对龙头箭竹开花区域的1年生更新苗的密度、基径和高度进行了调查。结果表明：（1）1年生幼苗的平均密度为21.7（±1.96）株﹒m⁻²、平均高度为7.94（±0.75）cm、平均地径为1.24（±0.07）mm；（2）中等程度的郁闭度、灌木层和草本层盖度均有利于龙头箭竹1年生更新幼苗的密度、基径和高度。在将来的管理中，可适当通过冠层遮阴的调控来加以管理，以加速龙头箭竹的恢复。

Abstract: In order to explore the regeneration after flowering and the growth characteristics of regeneration seedlings of Fargesia dracocephala in Baishuijiang National Nature Reserve of Gansu province, the density, basal diameter and height of 1-year-old regeneration seedlings after flowering of F. dracocephala had been studied. The results showed that: (1) The average density of 1-year-old seedlings was 21.7 (±1.96) plants per square meter, the average height was 7.94 (±0.75) cm, and the average basal diameter was 1.24 (±0.07) mm; (2) Moderate canopy density and understory (shrubs and herbs) promoted the density, basal diameter and height of 1-year-old regeneration seedlings. In order to accelerate the recovery of F. dracocephala, it is necessary to regulate canopy shade in future management.