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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
魏玉晗1, 李毓琦2, 赵 庆2
1.广东省岭南院勘察设计有限公司;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
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。
关键词:  低效林  绿美广东  城郊森林  改造
DOI：
分类号:
基金项目:
Research on Low-efficiency Suburban Forest Targeted Reconstruction: A Case Study of Low-efficiency Forest Renovation Project in Luohu District of Shenzhen
WEI Yu-han1, LI Yuqi2, ZHAO Qing2
1.Guangdong Lingnanyuan Exploration and Design Co Ltd;2.Guangdong Academy of Forestry/Guangdong Provincial Key Laboratory of Silviculture Protection and Utilization
Abstract:
To elucidate the growth effects of low-efficiency forests, such as Eucalyptus robusta and Acaci mangium after reconstruct a ion, 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 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.
Key words:  inefficient forest  green beauty Guangdong  sub-urban forest  transformation