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Chinese Journal of Applied Ecology ›› 2022, Vol. 33 ›› Issue (8): 2088-2096.doi: 10.13287/j.1001-9332.202208.007

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Spatial structure characteristics of plain ecological plantation in Tongzhou District, Beijing, China

CUI Cheng-cheng1, ZHA Tong-gang1,2*, ZHANG Xiao-xia3, CHEN Yu-jia1, GAO Lian-wei1, BAI Ling-ran1, MA Zi-ao1, YU Yang1,2   

  1. 1School of Water and Soil Conservation, Beijing Forestry University, Beijing 100083, China;
    2Beijing Engineering Research Center of Soil and Water Conservation, Beijing 100083, China;
    3The Third Construction Co., Ltd. of China Construction First Group, Beijing 100161, China
  • Received:2021-11-10 Accepted:2022-04-06 Online:2022-08-15 Published:2023-02-15

Abstract: Forest spatial structure (FSS) directly reflects resource competition and growth space distribution among different trees. The characteristics of FSS play an important role in mastering the growth status of ecological forest, formulating stand structure regulation measures, and improving forest quality and ecological services. In this study, seven plain ecological plantations including Pinus tabuliformis, Fraxinus chinensis, Salix matsudana, Populus tomentosa, Sophora japonica, Robinia pseudoacacia, and Salix babylonica in Tongzhou District, Beijing were selected as the research objects. The spatial structure characteristics of plain ecological plantations were evaluated by aggregation degree, angle index, neighborhood comparison, open degree, canopy index, competition index, edge benefit, and spatial structure comprehensive index. The horizontal distribution pattern of stand was well, with the aggregation degree of 0.32-1.41, the angle index of 0.4, and the neighborhood comparison mainly around 0.5. The vertical distribution pattern of stand was not well and needed to be improved, with the open degree of 0.19-0.52, most canopy indexes of about 0.7. The competition index presented a high competitive status with the all values of >50. Except the comprehensive evaluation index of R. pseudoacacia plantation presented in grade Ⅲ, the other six kinds of plain ecological plantations fell to grade Ⅱ, with low stand openness and low vitality. The comprehensive evaluation indices of FSS followed the order of R. pseudoacacia > S. babylonica > P. tabuliformis > S. matsudana > F. chinensis > S. japonica > P. tomentosa.

Key words: plain ecological plantation, spatial structure, competition index