5种地被植物耐践踏性综合评价
2021-09-03崔雅芳李艳辉牟宁宁张雨辰崔潆心郭金辉苏治维
崔雅芳 李艳辉 牟宁宁 张雨辰 崔潆心 郭金辉 苏治维



摘要 以马蔺、野牛草、草地早熟禾、崂峪苔草、麦冬5种地被植物为试验材料,采用人工践踏法进行试验处理,以不践踏为对照,测定践踏处理下5种地被植物的SOD、POD活性、MDA、叶绿素含量、叶长、根长、根重7个形态和生理指标变化值。采用主成分分析法分析其与植物耐践踏性之间的关系。通过主成分提取,用3个新的综合指标代替原来的7个单项指标。3个综合指标的累计贡献率为98.545%。所选的7个生理指标与耐践踏性的相关性顺序为POD活性>根重>叶绿素含量>MDA含量>SOD活性>根长>叶长。采用隶属函数加权法对5种地被植物的耐践踏性进行综合评定,其耐践踏性强弱次序为野牛草>马蔺>麦冬>崂峪苔草>草地早熟禾。
关键词 地被植物;耐践踏性;主成分分析;综合评价
中图分类号 S 688.4 文献标识码 A
文章编号 0517-6611(2021)14-0128-03
Abstract Five ground cover plants,i.e. Iris lacteal,Buchloe dactyloides,Poa pratensis,Carex giraldiana,Ophiopogon japonicas were used as test materials,and artificial trampling was used for the experimental treatment,with no trampling as the controlled trial. The change values of 7 morphological and physiological indexes of 5 ground cover plants under trampling treatment,including superoxide dismutase (SOD),peroxidase (POD),malondialdehyde (MDA),chlorophyll,leaf length,root length,and root weight were measured. Principal component analysis was used to analyze the relationship between it and plant tramp resistance. Through the extraction of principal components,3 new comprehensive indicators replaced the original seven individual indicators. The cumulative contribution rate of the three comprehensive indicators is 98.545%. The order of correlation between the selected 7 physiological indicators and tramp resistance was POD>root weight>chlorophyll>MDA>SOD>root length>leaf length. Applying the method of weighted subordinate function,comprehensively evaluated the tramp resistance of the 5 ground cover plants. The order of tramp resistance was Buchloe dactyloides > Iris lacteal > Ophiopogon japonicas > Carex giraldiana > Poa pratensis.
Key words Ground cover plant; Trampling resistance;Principal component analysis;Comprehensive evaluation
基金項目
北京动物园园管课题“地被植物在节约型园林建设中的选择与应用(KGBZ201912)”。
作者简介 崔雅芳(1981—),女,北京人,高级工程师,从事园林绿化研究。*通信作者,农艺师,硕士,从事园林绿化研究。
收稿日期 2020-11-02
目前,国内外针对植物践踏性的研究材料主要集中于禾本科草坪植物[1]。有关地被植物耐践踏性评价[2],对践踏的生理响应以及在践踏条件下可用于园林景观种植的资源研究仍较少。为此,该研究测定了5种地被植物在践踏处理下所发生的形态和生理生化指标变化,采用主成分分析法分析其与植物耐践踏性之间的关系,采用隶属函数加权法对5种地被植物的耐践踏性进行综合评定,以期为耐践踏地被植物在开放性生态园林中的应用提供指导和科学依据。……p>
