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采用实地调查法对大连市城市森林5种绿地类型的93块有效样地进行调查,记录样地内的树种、树高、胸径、冠高、冠幅等指标,测算样地树木的三维绿量;通过对树木水平径级结构、垂直径级结构的研究,发现大连城市森林三维绿量的变化趋势与树高和胸径成正相关;城市新栽植的树木对三维绿量的贡献较小,三维绿量值主要取决于大龄级、大树冠的树木;公园绿地与居住区绿地三维绿量分布较为合理,其水平径级、垂直径级的水平都明显高于其它3种绿地类型。
Field surveys were conducted to investigate 93 valid samples of 5 types of greenbelt in urban forest in Dalian. The tree species, tree height, DBH, crown height and crown width were recorded. Through the study on the horizontal and vertical diameter structure of trees, it was found that the trend of three-dimensional green of urban forest in Dalian is positively correlated with the height and diameter of the tree; the newly planted trees in the city contributed little to the three-dimensional green, The value mainly depends on the trees of the elder class and the tree crown. The three-dimensional green distribution of green space in the park and residential areas is more reasonable, and the levels of horizontal diameter and vertical diameter are obviously higher than the other three types of green space.