摘要
根据近40a南京紫金山5次森林资源调查的资料,分析了当地森林资源变化规律,认为紫金山森林资源的质量正逐步提高。有林地面积从1953年的1101 0hm2增加到2002年的2107 6hm2,疏林地和灌木林地明显减少,从1986年到2002年均净增率分别达-35 22%和-41 90%,森林覆盖率由1953年的36 0%增加到2002年的70 2%,年均增长速度为1 37%,蓄积量年均增长速度为3 52%。
Based on the materials of five times forest investigations in Purple Mountain,the dynamics of forest resources was studied.The quantity of the forest resources increases gradually.The woodland area rose from 1 101.0 hectares in 1953 increasing to 2 107.6 hectares in 2002.The annual growth rate of brushland and sparsely forested land fell from -35.22% in 1986 to -41.90% in 2002.The forest percent was 36.0% in 1953 increasingn to 70.2% in 2002.Average growth rate of standing stock is 1.37%,accumulare average growth rare of standing stock is 3.52%.
出处
《江苏林业科技》
2004年第1期6-8,25,共4页
Journal of Jiangsu Forestry Science & Technology
关键词
紫金山
森林资源
动态分析
Zijinshan Mountain
Forest resources
Development
