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南方低山丘陵区村域森林景观及植物群落特征

Rural Forest Landscape and Plant Communities in Hilly Areas of South China

  • 摘要: 目的  探索南方低山丘陵区农村地区科学的森林恢复方式,改善森林结构及维护生物多样性,以保障森林生态系统的可持续发展和森林资源的永续利用。 方法  基于高分辨率GF-2数据和实地调查,以浙江省杭州市临安区昔口村为研究对象,对其森林景观及植物群落特征进行调查研究。 结果  昔口村森林面积占村域总面积的80.80%,主要林分类型有阔叶林、针阔混交林、马尾松林、杉木林、竹林、香榧林,村域内天然林、人工混交林面积小,以人工单层纯林为主,林下植被盖度偏低,植物多样性明显丧失。大部分乔木树高、胸径偏低。 结论  昔口村森林生态系统整体结构简单、多样性较低,若持续传统的造林、经营方式,势必会导致林分退化、地力衰退等问题。建议对现存的阔叶林、针阔混交林进行封育、改造,促进其向优质的常绿阔叶林转化,对马尾松生态公益林进行改造,引种补植乡土树种营造混交林,用材林、经济林采用小面积种植的方式,选择当地乡土阔叶树种、适生阔叶树种营造混交林作为绿色隔离带与小面积用材林、经济林镶嵌种植,并辅以科学的抚育经营措施。

     

    Abstract: Objective  To explore the suitable way of forests rehabilitation in rural areas of low hilly areas in south China, improve the forest structure, maintain biodiversity and ensure the sustainable development of forest ecosystems and the sustainable use of forest resources. Method  Taking Xikou Village of Hangzhou, Zhejiang Province, as the research object, based on high-resolution GF-2 data and field surveys, the forest landscape and plant community characteristics were investigated and studied. Result  The area of forest in Xikou Village accounted for 80.80% of the total area of the village. The main types of forest are broadleaved forests, coniferous and broadleaved mixed forest, Pinus massoniana forests, Cunninghamia lanceolata forests, bamboo forests, and Torreya grandis forests. In the village, the area of natural forest and artificial mixed forest is small, while the area of artificial single-layer pure forest is large, and the undergrowth vegetation coverage is low, and the plant diversity was obviously lost. Conclusion  The overall structure of the forest ecosystem in Xikou Village is simple and the diversity is low. If the traditional afforestation and management mode continues, it is bound to lead to forest degradation, soil degradation and other problems. It is suggested that the existing broadleaved forest and coniferous and broadleaved mixed forest should be closed and reformed to promote its transformation to high-quality evergreen broadleaved forest. The ecological public-welfare forests of Pinus massoniana should be transformed by introducing and replanting native species to create mixed forests. Industrial plantation and non-timber plantation should be planted in small scale and small areas, and the local native broadleaved tree species and suitable broadleaved tree species should be selected to create mixed forests as green isolation zones and inlaid with small area of industrial forests and non-timber forests with reasonable tending and management measures.

     

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