城市绿地的破碎化分析

An Analysis of Fragmentization of Urban Vegetation

以湖州市为个案 ,采用绿地斑块面积谱、斑块数破碎化、斑块形状破碎化等斑块结构描述方法 ,分析了湖州市绿地斑块的破碎化程度 .结果显示 ,90年代建成区比 80年代建成区绿地斑块破碎化程度小 ,新区比旧城区破碎化程度小 .湖州市没有 10 0 0 0m2 以上的大绿地镶嵌体 ,绿地斑块以草坪为主 ,缺少乔木灌木 ,生物量小 ,稳定性差 .城市绿化过程中没有充分利用地形优势 。

Adopting the constructional description method of vegetation patches area table and fragmentization of patchs amount and shape, this paper analyses the fragmentization degree of vegetation patches of Huzhou city. The result shows that there was less vegetation patches fragmentization degree of urban district constructed in 1990s than in 1980s, and there was less damage caused in the new urban district than in the old one. Huzhou city has not a big vegetation patch of more than 1000m 2, and vegetation patches mainly are lawns, and lacks arbores and bushes. The quantity of living beings is little, and the stability is poor. The afforesting process of the urban area does not give full play to its topographical advantages, and the afforestation of the urban are a needs improveing.