南京林业大学学报（自然科学版）2011，Vol.35Issue(3)：16-20,5.DOI:10.3969/j.issn.1000-2006.2011.03.004
不同林龄飞播油松林林下植被多样性研究
Study on the diversity of understory vegetation in different age aerial seeding forests
摘要
Abstract
Aerial seeding is a very important way of afforestation, and China aerial seeding area takes up the first place in the world. Compared to tree planting, aerial seeding has some shortcomings: the heavy density, enclosure management after the implementation of afforestation, early canopy, and poor development of understory vegetation. In this paper, using the method of space generation time, we selected three ages of aerial seeding forests: 10, 17 and 25 years old as the research objectives, and analyzed their compositions of understory vegetations, the dominate species, vertical stratifications and the changeable of species diversities. The results show that there exists a minor differences in the number of species among three different ages of aerial seeding forests, the number of species of understory vegetation in 10,17,25 years old forests were 27,24 and 20 respectively. The dominate species in 10, 17 and 25 aged forests are all Spiraea pubescens + Spiraea trilobata-Carex lanceolata. Shrub layer's height increases as the age of the forest increases. The 17 years old aerial seeding forest has the maximum herb layer height. Shrub and herb layers coverage first decreased and then increased when the trend's age increases; the index of Shannon-Wiener of 10, 17 and 25 years old aerial seeding forest of understory vegetation is 2. 508,0. 824 and 0. 776, and Pielow index is 0. 779,0. 256 and 0. 241 respectively.The diversity of understory vegetation declines when the forest gets older, shows that, the arber layer gives a rising pressure to inhibit the growth of the understory vegetation, so it is necessary to manage aerial seeding forest at the appropriate time to control the forest structure is needed.关键词
飞播油松林/林下植被/物种多样性Key words
aerial seeding forest/ understory vegetation/ species diversity分类
农业科技引用本文复制引用
林娜,刘勇,于海群,李国雷,吕瑞恒..不同林龄飞播油松林林下植被多样性研究[J].南京林业大学学报（自然科学版）,2011,35(3):16-20,5.基金项目
北京林业大学科技创新计划(BLJD200905) （BLJD200905）
高等学校博士学科点专项科研基金(20090014110011) （20090014110011）
国家自然科学基金项目(30972353) （30972353）
北京市生态公益林质量升级关键技术研究产学研联合培养研究生基地资助项目(CXYBL2008-2010) （CXYBL2008-2010）
