基于乡土树种利用的龙丽温高速公路生态廊道改造

Ecological Corridor Renovation of Longliwen Expressway Based on the Utilization of Native Trees

为提升高速公路生态廊道森林景观效果,建立了美丽生态廊道森林群落评价指标,调查了龙丽温高速公路廊道植被状况后发现,多年的人工经营改变了森林原有的自然植被特征,各种纯林脆弱与不稳定的缺陷,给森林可持续经营带来风险。根据森林演替规律,提出充分利用乡土树种,对不同群落使用间伐改造、补植、定向抚育等措施,增加森林群落内具有明显层次、叶色、花色和果色的乡土阔叶树种品种和数量;对容易发生森林火灾区域,种植耐火阔叶树种;清除外来有害生物、保护生物多样性的建设目标。通过改造,构造不同的景观斑块,形成具有空间和时间变化的异质景观,各种景观彼此镶嵌,季相变化明显,形成丰富多彩、美学价值高、生态功能强的美丽生态廊道景观。

In order to improve the forest landscape effect of the ecological corridor on the expressway,a beautiful ecological corridor forest community evaluation index was established.After investigating the vegetation status of the Longliwen Expressway corridor,it was found that years of artificial management have changed the natural vegetation characteristics of the forest.Based on the law of forest succession,it is proposed to fully utilize native trees species and adopt measures such as thinning,replanting,and targeted nurturing for different communities to increase the number of local broad-leaved tree species with obvious levels,leaf colors,flower colors,and fruit colors within the forest community;Planting fire-resistant broad-leaved tree species in areas prone to forest fires;The construction goal is to eliminate foreign harmful organisms and protect biodiversity.By transforming and constructing different landscape patches,a heterogeneous landscape with spatial and temporal changes is formed.Various landscapes are embedded with each other,with obvious seasonal changes,forming a rich and colorful,aesthetically valuable,and ecologically functional beautiful ecological corridor landscape.