辽宁西部低山丘陵区植被恢复研究:基于演替理论和生态系统退化程度

摘要/Abstract

摘要： 在对辽宁西部地区植被演替分析的基础上,选用不同演替阶段的生境指标,应用聚类分析方法,定量确定了辽宁西部低山丘陵区退化生态系统的退化程度.在辽宁西部地区,南刘杖子林场的天然栎林、天然油松林、杨栎林、牛河梁和欺天林场坡地的人工油松林与天然松栎林的平均相异系数分别为0.655、0.665、2.029、3.919,综合反映了其在生态系统演替/退化中的相对位置.研究表明,辽宁西部低山丘陵区现有油松林(阴坡)立地大多已退化到灌木林和先锋乔木林之间的演替阶段,并且接近于先锋乔木林阶段;建议在现有人工林经营改造或营造混交林时,应适当增大灌木树种和先锋乔木树种的比重.

关键词: 退化生态系统, 退化程度, 演替理论, 植被恢复, 油松, 辽宁西部

Abstract: Based on the analysis of vegetation succession in western Liaoning hilly region,and by the method of Cluster Analysis with some habitat indexes of different succession stage,this paper quantitatively measured the degradation degree of degraded ecosystems in this region.The results showed that the average dissimilarities between natural Quercus forest,natural Chinese pine (Pinus tabulaeformis) forest and Populus-Quercus forest in Nanliuzhangzi forestry centre and Chinese pine plantations in Niuheliang region and Qitian forestry centre were 0.655,0.665,2.029 and 3.919,respectively,and as a whole,the dissimilarities represented the places of the forests in the process of ecosystem succession /degradation.It was also showed that most habitats were degraded to the stage between shrubbery and pioneer arbor forest,and closer to the succession stage of pioneer arbor forest.Some suggestions were made for the management of the existing plantation and the construction of mixed forest,e.g.,to increase the proportion of shrubbery and pioneer arbor species,especially that of nitrogen fixation tree species.The plant species list of several main vegetation types in western Liaoning we offered could provide scientific reference for the vegetation restoration and the management of pure Chinese pine plantation in this region.

Key words: Degraded ecosystem, Degradation degree, Succession theory, Vegetation restoration, Chinese pine, Western Liaoning Province

中图分类号:

S718

杜晓军, 姜凤岐, 焦志华. 辽宁西部低山丘陵区植被恢复研究:基于演替理论和生态系统退化程度[J]. 应用生态学报, 2004, (9): 1507-1511.

DU Xiaojun, JIANG Fengqi, JIAO Zhihua . Vegetation restoration in western Liaoning hilly region: A study based on succession theory and degradation degree of ecosystem[J]. Chinese Journal of Applied Ecology, 2004, (9): 1507-1511.

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