广州市南沙区海岸防护林群落构建技术研究

森林是稳固和改善生态环境的重要载体，因其能提供巨大的生态服务功能而备受各国政府和学界的关注。珠江三角洲地区城市化进程的步伐逐渐加快，带来一系列环境问题。以广州市南沙区海岸景观防护林（也即河涌水网林、公路隔离林、海岸防风林）建设为例，主要研究了防护林的关键构建模式、林分群落结构等方面内容。结果显示，采用多层次的乔灌草配置，遵循适地适树的原则，以本土树种为主，搭配部分优良的引进树种，采取适合的营林措施，可构建出具有一定防护功能的人工林群落。广州南沙防护林建设是珠三角地区城市森林建设的一个缩影和代表，为我国南方城市森林建设理论的创建提供了一定的参考经验。破解城市化危机，创建宜居城市环境，实现城市可持续发展，应综合考虑城市的人口集中程度，经济发展规模，环境污染模式，针对具体的水分、气候和土壤等要素，运用多学科理论和技术，制定合适的森林构建模式，并需要政府、社会组织、以及公众的协同努力。

Construction of coastal protective forest communities in Nansha district,Guangzhou city

Forests, being an important vector in retaining and improving the quality of the present ecological environment, have attracted special concerns from governments and academia because they provide enormous ecosystem services for the planet. The pace of urbanization in the Pearl River Delta region is speeding up, which results in a series of environmental problems. The present study was carried out in a protective forest （consisting of three forest communities, i.e., water channel forest, windbreak forest, and isolating forest） in Nansha district, Guangzhou city, and was demonstrated as a case of urban forest construction in the Pearl River Delta. The study described the main purpose, key modes of the forest construction, and forest community structure therein. The results showed that artificial forest communities with certain protection functions could be constructed when following the principle of matching species with the site, using the proportion of arbor, shrub and grasses, giving a top priority to native tree species and a supplementary of exotic tree species, and adopting proper silvicultural measures before, during and after the afforestation. Construction of protective forest in Nansha district is a miniature and representative of urban forest construction in the Pearl River Delta, which possibly offers a reference for forming theories of urban forest construction in southern China. Resolving the urbanization crises, creating a livable environment, and achieving sustainable development, should seriously consider the population, the economy, and the pollution of the city, form suitable forest construction modes on the basis of water, climate, and soil condition from the point of multi-disciplinary theories and technologies, and also promote the collaboration from the government, social organizations, as well as the public.