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本文对木麻黄防护林基干林带的防风效能及其与林带结构的关系进行了探讨,结果表明:滨海木麻黄防护林基干林带背风面1～20H 水平风速降低可达60%～70%;林带的防护效应与林带的结构状况有关,其中以疏透结构林带最佳,林带的防护效能最强,而紧密结构和通风结构林带的防风效能较弱;根据林带透风系数与林带密度、枝下高、冠幅等结构因子的量化关系,利用数量化理论Ⅰ模型对木麻黄基干林带的透风系数进行定量分析,从而推算出闽南沿海基干林带最佳结构的技术参数:林带密度控制在1755～2505株/hm~2,林带枝下高2.0～4.0 m 为宜。在营林生产中,可应用木麻黄林带的结构参数,确定相应的营林方法和配套技术。
The paper studied the windbreaking effect and the relationship between the windbreak effect and the structure of forest belt of Casuarina equisetifolia trunk shelterbelt. The results showed that the wind speed of 1 ~ 20H wind speed of Casuarina splitter forest shelterbelt could be reduced by 60% -70%; the protective effect of forest belt Which is related to the structure status of the forest belt. Among them, the shelterbelt is the best, and the shelterbelt has the strongest protective effect, while the windbreak effect of the compact structure and the ventilated forest belt is weak. According to the belt permeability and the belt density, And other structural factors, quantitative analysis of permeability coefficient of Casuarina equisetifolia trunk forest belt was carried out based on Quantitative Theory Ⅰ model, so as to deduce the technical parameters of optimal structure of the forest belt in the coastal zone of southern Fujian: the density of forest belt was controlled at 1755 ~ 2505 plants / hm ~ 2, high 2.0-2.0 m tall forest stand is appropriate. In the management of forest production, the structural parameters of Casuarina equisetifolia can be used to determine the corresponding management methods and supporting technologies.