| Excavation of engineering construction results in broken mountain, while the brokenmountain causes landscape fragmentation. In the changes of landscape pattern and thephysical environment at the same time, landscape fragmentation results in the changes ofindividual behavior, genetic structure, population dynamics, intercropping, and communitycharacteristics. Ecological restoration of crushing mountain is the extremely significantsignificance to the regional environmental landscape improvement, water and soilconservation and ecosystem stability. On the rock crushing mountain, vegetation restorationis prerequisite for establishment of soil environmental stability in the slope surface, so theecological restoration involves two aspects: soil and vegetation restoration. Vegetation is thebasis of ecological restoration, while the soil fertility is the foundation of vegetationrestoration. Soil fertility of the rock crushing mountain is basis of that if ecologicalrestoration can achieve the desired effect. Its status, to a large degree, determines that if theplants can have a sustainable and healthy growth.The construction of Ji’nan Olympic Sports Center has been greatly changed the originalarea of the surface structure, features and the ecological environment, leading to the mountainand the ecological landscape fragmentation, which has great negative effects to the regionalenvironmental landscape, soil and water conservation, ecological stability. Based on theevaluation of plant diversity and soil fertility of broken hill in Ji’nan Olympic Sports Center,this paper analyzes the effects of ecological restoration in order to provide references for thesame type of crushing mountain ecological restoration. Through the research, this paperobtained the following conclusions:(1) For initial emergence of rate, ryegrass up to89.98%is the maximum, thenbermudagrass is85.01%, the minimum is10.05%for vervain.(2)The maximum seedling rate up to11.11%for vervain, Platycladus orientalis,Cynodon dactylon and ryegrass’s seedling rate was0%.(3) The height of tree and shrub’s growth is55.0~370.0cm, the average height ofherbaceous plants’ growth is75.3~240.0cm. (4) The natural invasion is8species, belonging to7families and8genera. Among them,3species of Compositae is more, accounting for37.5%of the total number of invasive plants.(5) Plant species are increased from6families10genera and10species to9familiesand15genera15species, including5species of Compositae Plants accounts for33.33%ofthe total species,3species of leguminous plants accounts for20%of the total species, whileother species are one.(6) The results of the calculation of the important value of each species show that floschrysanthemi indici is the dominant species of herbaceous plants, Robinia pseudoacacia istree and shrub’s dominant species. In addition, the natural invaded Chenopodium glaucumand white bud of Artemisia’s communities advantages are more obvious, which means theyhave competition with other spray seeding plants.(7) Compared with the original soil, the integrated fertility of mixed soil and soil withgrowth is improved, while the soil with growth is below the mixed soil.(8) Compared with the mixed soil, the contribution of organic matter, total nitrogen,available nitrogen of soil with growth is increased.(9) Compared with the mixed soil, the contribution of total phosphorus and availablepotassium of soil with growth is decreased.(10) Soil fertility of wire mesh upper value is greater than the lower soil bulk density.The contribution of pH, organic matter, total nitrogen, available K in upper soil is greater thanthe lower soil.(11) The slope soil is less exposed. Due to the influence of planting trees in the localbottom slope formed some bare soil, occasionally anchor spraying layer of barbed wireexposed. The slope is stable, rarely layer peeling off phenomenon, only a small amount offlaking on local vertical section. |
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