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[1]WU Duoyang,JIAO Juying,YU Weijie.Species Composition and Community Characteristics of 15-Year-Old Robinia pseudoacacia Forest and Natural Vegetation in Ansai, Shaanxi Province[J].Research of Soil and Water Conservation,2017,24(04):12-18,26.

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Species Composition and Community Characteristics of 15-Year-Old Robinia pseudoacacia Forest and Natural Vegetation in Ansai, Shaanxi Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 04 Page number: 12-18,26 Column: Public date: 2017-08-28

Title:: Species Composition and Community Characteristics of 15-Year-Old Robinia pseudoacacia Forest and Natural Vegetation in Ansai, Shaanxi Province

Author(s):: WU Duoyang¹, JIAO Juying^1,2,3, YU Weijie²; 1. College of Forestry, Northwest A & F University, Yangling, Shannxi 712100, China;
2. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shannxi 712100, China;
3. Institute of Soil and Water Conservasion, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shannxi 712100, China

Keywords:: planted forest; natural restoration of vegetation; species composition; community characteristics; loess hilly and gully region

CLC:: Q948.1

DOI:: -

Abstract:: In order to investigate the effect of Robinia pseudoacacia plantation on vegetation restoration in loess hilly and gully region of northern Shaanxi, the 15-year-old locust plantation and the corresponding natural vegetation were studied in the three watersheds in Ansai County. The results of species composition showed that 60 species of plants were found in the Robinia pseudoacacia plots, belonging to 27 families and 49 genera. Among them, Gramineae, Compositae, Leguminosae, Rosaceae plants were the most. 62 species were found in the natural vegetation plots, including 21 families and 49 genera, Compositae, Leguminosae and Gramineae plants were the most. No matter under Robinia pseudoacacia or natural vegetation, the growth types were mostly annual herbaceous and perennial herbaceous plants, and the water ecotype was mainly composed of xerophytes and drought-types. In addition, ground bud plants occupy the dominant position. The dominant species of the locust understory were Setaria viridis, Leymus chinensis, Erodium stephanianum, Heteropappus altaicus, Heteropappus altaicu, Stipa bungeana, while the dominant species under natural restoration were composed of Bothriochloa ischaemum, Lespedeza davurica, Heteropappus altaicus, Stipa bungeana, Heteropappus altaicu and Astragalus melilotoides. On the sunny slope, the community coverage, above-ground biomass and species diversity index of were significantly higher than those of Robinia pseudoacacia vegetation(p < 0.05), while these were no difference between the natural restoration vegetation and Robinia pseudoacacia vegetation on the shady slope. The results showed that the inhibitory effect of tree growth on the understory forest should take into account for vegetation restoration on the sunny slope in the loess hilly and gully region, and the existing canopy should be managed in time to promote the growth of understory vegetation by making scientific and rational allocation of trees, shrubs and herbs to rich community level structure and optimize the ecological function of the Robinia pseudoacacia community.

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