两种人工林对工程建筑废弃地植被初始生态恢复的影响

Effect of two species of transplanted trees on ecology restoration on wasteland.

以隔河岩水电工程建筑废弃地初始生态恢复中人工构建植被为研究对象,在样地调查的基础上,分析了废弃地退化生态系统植物多样性和植物群落组成与结构的恢复对种植植物种类的生态响应。通过与周围未治理废弃地及自然次生林群落组成与结构的比较,研究了该废弃地植被的生态恢复进程。结果显示,苗木种植促进了本地植物种类在废弃地的扩散和定居,初步形成了具一定组成与结构的群落类型,是一种及时有效的生态恢复技术。但不同的苗木种类对废弃地植被初始生态恢复的效果不同,通过比较圆柏(Sabinachinensis)和湿地松(Pinuselliottii)2种人工林的生物多样性及群落组成与结构,认为圆柏林的初始生态恢复效果比湿地松林好。

Early patterns of community composition and structure under 10-year-old tree plantations on the wasteland of Geheyan hydroelectric project were evaluated.Undamaged natural secondary forests and unmanaged wasteland near the project were also investigated in order to provide contrasts for further analysis.There were 75 species invaded and established on the wasteland other than the two planted,including 26 species of shrubs and 50 species of herbs under 35 families and 68 genera.Different planted species brought about diverse preliminary forest community under the plantation.61 species appeared under the plantation of Sabina chinensis,a native species,including 30 herbaceous species and 16 woody species and 14 vine species,whereas only 42 species under the plantation of Pinus elliottii,an exotic species,by contrast,including 34 herbaceous species,3 vein species and 5 woody species.The species diversity under Sabina chinensis increased more quickly than that under Pinus elliottii,especially on the shrub layer.The difference in species composition resulted in different community structure.It is necessary for us to get more information on tree species to be planted,not only their biological features but also their ecological characteristics before making plantation scenarios.