Research on Low-efficiency Suburban Forest Targeted Reconstruction:A Case Study of Low-efficiency Forest Renovation Project in Luohu District of Shenzhen
To elucidate the growth effects of low-efficiency forests,such as Eucalyptus robusta and Acacia mangium after reconstruction,it could provide a basis for selecting tree species to enhance the ecological land-scape benefits of suburban forests.As a case study of a renovation project on low-efficiency forests in Luohu District of Shenzhen,30 m×30 m quadrates were arranged in each transformed plot.The above-ground growth,fine root biomass,and soil physicochemical properties of 6 ecotype tree species with good growth performance were analyzed.The results revealed that over a period of 0 to 18 months,Elaeocarpus sylvestris exhibited con-sistently high rates of tree growth.Elaeocarpus sylvestris,Sterculia lanceolata and Laeocarpus rugosus dis-played notable advantages in ground diameter growth.Among the six species,Elaeocarpus rugosus had the lar-gest crown area.The exponential growth rate of crown leaf area gradually decreased for Sterculia lanceolata and Ilex rotunda.Sterculia lanceolata demonstrated continuous increases in fine root biomass.AN,AK and SOM increased significantly improvement within 18 months after modification.Furthermore,the crown green quantity of Elaeocarpus sylvestri,Sterculia lanceolata and Elaeocarpus rugosus increased rapidly while maintaining a more transparent form which better suited them to withstand frequent typhoons experienced in coastal cities like Shenzhen.
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