城郊森林低效林精准提升改造研究——以深圳市罗湖区低效林改造工程为例  

Research on Low-efficiency Suburban Forest Targeted Reconstruction:A Case Study of Low-efficiency Forest Renovation Project in Luohu District of Shenzhen

作　　者：魏玉晗 李毓琦 赵庆[2] WEI Yuhan;LI Yuqi;ZHAO Qing(Guangdong Lingnanyuan Exploration and Design Co.,Ltd.,Guangzhou,Guangdong 510599,China;Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization/Guangdong Academy of Forestry,Guangzhou,Guangdong 510520,China)

机构地区：[1]广东省岭南院勘察设计有限公司,广东广州510599 [2]广东省森林培育与保护利用重点实验室/广东省林业科学研究院,广东广州510520

出　　处：《林业与环境科学》2024年第3期9-15,共7页Forestry and Environmental Science

基　　金：广东省林业科技创新项目(2022KJCX009)。

摘　　要：为明确桉树林Eucalyptus robusta、马占相思林Acacia mangium等低效林的改造效果,研究以深圳市罗湖区低效林改造工程为实例,在各改造地块布设30 m×30 m样方,对生长表现较好的6个生态型改造树种地上部分生长、细根生物量和土壤理化性质进行分析,结果表明:0~18个月内,山杜英Elaeocarpus sylvestri一直保持较高的树高增长速度;山杜英、假苹婆Sterculia lanceolata和尖叶杜英Elaeocarpus rugosus的地径生长具有明显优势;尖叶杜英的冠幅面积在6个树种中表现最优;假苹婆和铁冬青Ilex rotunda的树冠叶面积指数增长速度逐渐降低;假苹婆的细根生物量持续升高;有效氮、速效钾以及土壤有机质在改造后18个月,有显著的提升。尖叶杜英、山杜英和假苹婆树冠绿量快速增加,并保持较为通透的形式,可以较好地适应深圳等台风高发的滨海城市。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 landscape 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 consistently high rates of tree growth.Elaeocarpus sylvestris,Sterculia lanceolata and Laeocarpus rugosus displayed notable advantages in ground diameter growth.Among the six species,Elaeocarpus rugosus had the largest 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.

关 键 词：低效林 绿美广东 城郊森林 改造 

分 类 号：S756[农业科学—森林经理学]