沿海林网10种模式的区域性防风效果评价

应用朱廷曜等提出的区域性防风效应评价模型，对江苏沿海地区农田林网１０种模式的防风效果进行评价。结果表明：主栽树种和辅助树种复合结构或立体配置的林网，与相同主栽树种的单一林网相比，防风效果无差异，但不同主栽树种的林网之间，防风效果具有明显差异，以Ｉ－６９杨林网的防风效果最优，水杉林网次之，苦楝，刺槐，桃，梨等林网较差。

AN EVALUATION OF REGIONAL WIND-PROOF EFFECT OF 10 MODELS OF COASTAL FARMLAND WINDBREAK NETWORKS

In this paper the evaluation models that suggested by Zhutingyao,et., al are applied to the evaluation of regional wind-proof effeet of ten types of frmland windbreak networks.The results show that there is no difference between multiple windbreak composed of main species and accessory species and single windbreak with the same main species.However there is significant difference between windbreak networks with different main species.The protection effect of polar(I-69) windreak network is the best one;Matsaequoia glyptostroboides windbreak network takes the second place,and the wind-proof effect of chinaberry,yellow locust,peach and pear windbreak networks are relatively poor.The main factors which affect the protection effect of windbreak networks are height of the shelterbelt,transparent coefficient and the length of supplemental shelterbelt.