自然恢复条件下遂宁组紫色土母质生物多样性分析

Analysis on Bio-diversity of Suining Group Purple Soil Parent Material under Natural Restoration

提高生态系统的生物多样性可有效的控制水土流失。目前对水土保持林体系的高效空间配置与生物物种多样性的关系研究报道不多。该文对自然恢复条件下遂宁组母质生物多样性进行分析,结果表明:自然恢复条件下其植物群落生物多样性有较大提高,但群落丰富度和均匀度较差;乔木层、灌木层、草本层的优势种(先锋种)分别为柏木、马桑和豆薯。在遂宁组母质水土流失治理区营造水土保持林时,可采用柏木-马桑-豆薯复层混交林模式。

It is an effective way to control soil and water loss by enriching the bio-diversity, but there is few reports focusing on the relationship between the efficient spacial distribution of water-and-soil-conservationforest and the bio-diversity. The bio-diversity in the process of natural restoration on the Suining group parent material was studied by sampling method in this paper, whose results showed that in the process of natural restoration, there was a gradual increase on the bio-diversity of plant community, while the variety and the uniformity of plant community was low. And the dominant species in arbor layer, shrub layer and herbaceous layer were Cupressus funebris, coriaria nepalensis wall and Ipomoea batatas （L.）Lam. So the multiple layer mixed forest pattern ＂Cupressus funebris-coriaria nepalensis wall-lpomoea batatas （L.）Lam.＂ can be used in the process of building water-and-soil-conservation-forest in Soil erosion area.