摘要
利用磐安县2001年区划界定的28 190 hm2重点公益林作为研究对象,通过2001年和2012年不同林地类型生产力指标与森林生态状况指标的对比,运用数学方法测算出全县重点公益林评价指标值,评价与分析了全县重点公益林森林资源质量变化情况;活立木总蓄积由2001年81.5×104m3增加到2012年158.5×104m3;单位面积蓄积量由2001年30.53 m3/hm2增加到2012年59.88 m3/hm2;阔叶林及针阔混交林面积由2001年4 876 hm2增加到2012年13 547 hm2。群落结构复杂、乔灌草层次完整的公益林面积大幅增长,说明磐安县公益林林种树种结构趋于优化,生物多样性日益丰富,森林的生态功能与社会功能显著增强。全县公益林中针叶林所占比重过大,阔叶林与针阔混交林占比仍过少,中幼林面积过多,成过熟林面积过少。
National key ecological forest areas (28 190 hectares) were defined in 2001 in Pan'an, Zhejiang province. Productivity and ecological indicators of the above-mentioned different forest types were compared in 2001 and 2012. The result showed that standing stock increased from 81.5 ×104m3 in 2001 to 158.5 × 104m3 in 2012, unit area volume from 30.53m3paa in 2001 to 59.88 30.53m3Paa. Area of broad-leaved forest and mixed forest of conifer and broad-leaved forest increased from 4876 ha in 2001 to 13547 ha in 2012. Area of forest with complex community structure and three layers augmented, indicating better structure of forest and species with richer biodiversities, and better ecological and social function. But conifer forest takes more than half of the whole key ecological forest area, with young and middle aged forest.
出处
《浙江林业科技》
北大核心
2015年第3期53-56,共4页
Journal of Zhejiang Forestry Science and Technology
作者简介
杨定文(1966-),男,浙江磐安人,工程师,从事公益林建设、保护与管理研究;
通讯作者