紫色土人工植被恢复地植物多样性研究

Study on Plant Diversity of Artificial Vegetation Restoration Land in Purple Soil Area

为评价紫色土地区3种恢复模式的恢复效果,2010年10月对湖南省衡阳县紫色土国家重点水土流失治理示范区内3种植被恢复模式的植物群落进行了研究,结果表明人为引入龙须草能提高植物种类和数量,但与自然恢复模式相比,人工恢复模式下整个植物群落的多样性指数变化不明显。对3种恢复模式下的乔木、灌木和草本群落研究表明,人工恢复地和乔木群落的丰富度、Gleason丰富度指数、Simpson优势度指数、Shannon-Weiner多样性指数、Sheldon均匀度指数均明显高于自然恢复地,而灌木、草本群落无明显差异,说明经过4年的人工培育,人工植被恢复已取得了一定的效果,但仍处于恢复的演替阶段,群落结构还未达到稳定状态。

To evaluate the restoration effect of three kinds of restoration modes in the purple soil area,this paper studied the plant communities under three plant restoration modes in National Key Demonstration Area of Soil Erosion Governance in Hengyang county,Hunan province in October 2010.The results showed that artificial introduction of Eulaliopsis binata could improve plant species and quantity,but artificial restoration mode had not significantly changed the diversity index of plant communities compared with natural restoration mode.The studies on arbor,shrub and herbage communities in three restoration modes showed that the richness,Gleason richness index,Simpson dominance index,Shannon-Weiner diversity index and Sheldon uniformity index of artificially restoration land Ⅰ and Ⅱ were higher than those of natural restoration land,while there was not significant difference in the shrub and herbage communities.These showed that artificial vegetation restoration has achieved certain effect after four years of artificial cultivation,but the restoration was still in succession stage,and community structure has not yet reached stable state.