Mechanical damage in relation to tree characteristics after a catastrophic freeze in Tiantong Region,Zhejiang Province
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摘要: 为探讨冰冻雨雪灾后林木机械受损与功能性状间的联系,调查了浙江天童盘山8种人工林的灾后受损状况,并对主要常绿林木的抗雨雪冰冻功能性状进行了测定,结果显示:①柳杉Cryptomeria fortunei受损指数最大(0.54),木荷Schima superba次之(0.45),金钱松Pseudolarix kaempferi最低;木荷和红楠Machilus thunbergii幼树在纯林中的受损指数大于混交林。②几种常绿阔叶林木的抗机械损伤功能性状表现各异:叶面积和比叶面积最大的是木荷,其次是红楠,最小的是小叶青冈Cyclobalanopsis myrsinaefolia;树枝干物质质量分数和树枝密度的表现格局相反,即小叶青冈最高,木荷最低,红楠中等。③受损指数与叶面积和比叶面积间显著正相关(P<0.05),与枝条干质量和枝条密度间显著负相关(P<0.05)。常见常绿林木抗雨雪冰冻功能性状与林木受损指数间具有重要关联。图2表3参12Abstract: In early 2008 forest ecosystems in subtropical China were subjected to catastrophic heavy snow and freezing rain. The damage index and mechanical damage tolerance of common evergreen species (Cryptomeria fortunei,Schima superba,Pseudolarix kaempferi,Machilus thunbergii,and Cyclobalanopsis myrsinaefolia) in eight plantations of the Tiantong Region,Zhejiang Province,were determined and then compared with and correlated to tree traits (leaf area,specific leaf area,leaf dry matter content,twig dry matter content,twig density,and trunk density). Results showed that:1) the damage index was highest in Cr. fortunei(0.54),intermediate in S. superba (0.45),and lowest in P. kaempferi with damage severity for S. superba and M. thunbergii seedlings higher in monoculture forests than in mixed forests. Also,2) for mechanical damage tolerance,leaf area and specific leaf area were:S. superba>M. thunbergii>Cy. myrsinaefolia,but twig dry matter content and twig density were:Cy. myrsinaefolia>M. thunbergii>S. superba. Finally,3) the damage index was positively and significantly correlated with leaf area (r = 0.95,P<0.001) and specific leaf area (r = 0.86,P<0.01) but negatively and significantly correlated with twig dry matter content (r = 0.73,P<0.05) and twig density(r = 0.97,P<0.001). Thus,for evergreen trees in this area,there should be a ecological linkage between tree characteristics and the mechanical damage index.[Ch,2 fig. 3 tab. 12 ref.]
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2010.03.007

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