古浪县退耕还林区白榆防火林带宽度与株行距研究

The Width and Plant Spacing of the Fire-resistant Forest Belt of Ulmus pumila in Area of Convertting Farmland to Forest in Gulang County

运用样地调查的方法,以林带生物学特性、可燃物载量为基础,运用经典数学模型,对古浪县退耕还林区白榆防火林带的宽度、株行距、结构进行了研究。结果表明,白榆防火林带比较理想的结构为宽度2.9～8.7 m,株行距为外侧2.0 m×2.0 m,中间2.0 m×3.0 m。

The paper studied width,plant spacing and structure of the fire-resistant forest belt of Ulmus pum ila in area of convertting farmland to forest in Gulang County based on the forest belt biological characteristics and fuel load,at the same time,the sample survey method and the classical mathematical model are used.The results show that the width of the fire-resistant forest belt is 2.9.8.7 m,the plant spacing is 2.0 m×2.0 m on the outside and 2.0 m×3.0 m in the middle,which is an ideal structure.