皖东石灰岩丘陵地退化人工林自然演替过程的研究

Study on Natural Succession of Degraded Plantations on Limestone Hills in East Anhui

皖东丘陵地区分布有相对集中的石灰岩山地,岩石裸露、土壤瘠薄,加上易旱易涝的气候特征和不合理的人工造林等原因,导致人工林出现较大规模的退化现象,形成稀疏的落叶阔叶疏林地或灌木林地,造成林地浪费,土地利用率较低。笔者对退化的人工林中稀疏的落叶阔叶树资源采取封禁保护措施,促进退化林地的自然演替,破解石灰岩山地更新造林难题,促进生物多样性和自然生态修复,实现稳定的、可持续经营的目标。

In hilly regions in eastern part of Anhui Province, relatively concentrated distribution of limestone hills with bare rocks and barren soil, frequent droughts and floods and improper afforestation has led to large-scale degradation of plantations and formed sparse broad-leaved deciduous plantations and shrubberies, a waste of woodland and low land utilization rate. In this paper the measure of hill- closure was adopted for degraded sparse broad -leaved deciduous plantation resources to facilitate natural succession of degraded woodland and solve the problem of reforestation on limestone hills, which would promote biodiversity and natural ecological restoration and achieve the goal of steady and sustainable management.