退耕还林油樟林空间分布特征及其影响因素——以四川省宜宾市翠屏区为例

Spatial distribution characteristics and influential factors of Cinnamomum longepaniculatumforestry in returning grain plots——A case study in Cuiping district,Yibin city,Sichuan province

为了分析农户选择油樟的影响因素,以四川省宜宾市翠屏区部分乡镇为例,将历年来退耕还林图斑数字化,在ArcGIS环境下对其面积、空间分布等进行分析。结果表明:油樟是当地最主要的退耕还林树种,所占比重最高;油樟的空间分布具有聚集特征,尤其在原有油樟林地周围分布最多;距离传统油樟种植区越近,油樟在退耕还林树种中所占比重越高。这些空间特点说明,在油樟发展中自然环境有约束作用但不是最主要因素,当地政府引导、原有油樟栽植农户的示范带动作用,对油樟栽植的影响最大。然而,油樟的发展也将面临一定的困难,需要引起当地政府和农户的重视。

The Grain for Green Project is one of the most import engineering program for the environmental protection and ecological improvement in China. Cinnamomurn longepaniculaturn is one of the most native tree species planted in Yibin city, Sichuan province, which has significant economic and ecological benefits. To analyze the affecting factors in the selection of tree species for the Grain for Green Project, some townships in Cuiping district, Yibin city, Sichuan province were chosen to be the case study for the digitalized analysi＇s of the area and spatial distribution withArcGIS. The following results are obtained. Cinnamomum longepaniculatum is the most important tree species in the Grain for Green Project, with the largest proportion and obvious concentration characteristics. Especially, it is the most largely distributed one in the original area of Cinnarnomum longepaniculatum forestry, and the closer the new Cinnamomum longepaniculatum forest is to the original one, the higher ratio of the Cinnamomum longepaniculatum is to other tree species in the Grain for Green Project. These spatial distribution characteristics indicate that natural environment limits the planting of Cinnamornum longepaniculatum, while the government guidance and the demonstration for the original famers play a key role. There are some problems limiting the development of Cinnamomum longepaniculatum industry, and the local governments should pay more attention to these issues.