基于功能性状的常绿阔叶植物防火性能评价

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 基于功能性状的常绿阔叶植物防火性能评价 DOI: 10.5846/stxb201301030010 作者: 作者单位: 浙江省宁波市林特科技推广中心,华东师范大学,浙江农林大学,华东师范大学 作者简介: 通讯作者: 中图分类号: 基金项目: 宁波市重大(重点)择优委托项目(2007C110032, 2012C10027); 浙江省科技厅重大项目(2006C12060) Functional trait-based evaluation of plant fireproofing capability for subtropical evergreen broad-leaved woody plants Author: Affiliation: Ningbo Technology Extension Center for Forestry and Specialty Forest Products,,,East China Normal University Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:植物功能性状不仅便于评价植物的防火性能,也有利于筛选防火植物。以宁波地区的29个常绿木本植物为对象,在测定植物比叶面积、叶干物质含量、叶片含水量、枝条干物质含量和树皮厚度5个功能性状,以及鲜叶的7个防火性能指标的基础上,通过因子分析将防火性能指标划分为抗燃性fa(包含抗火性因子f1 和燃烧速度因子f2 2个公因子)与燃烧性fb 2个防火因子,然后利用Pearson相关分析和偏相关分析建立了5个功能性状与各个防火因子的相关性,并对29个物种的防火性能进行评价。结果表明:1)比叶面积和树皮厚度与抗火性因子f1,枝条干物质含量、树皮厚度和当年生叶片含水量与燃烧速度因子f2,比叶面积与抗燃性因子fa,叶片干物质含量、比叶面积和当年生叶片含水量与燃烧性因子fb间存在显著的相关关系;2)偏相关简化植物防火性状后,比叶面积和叶干物质含量分别对抗燃性因子fa与燃烧性因子fb的指示性最好;3)分别基于功能性状和燃烧试验的物种抗燃性排序相似度为0.80。研究证明,基于简易观测的植物功能性状可较好地反映树种的抗火性和燃烧性,可作为植物防火性能有效的评价方法。 Abstract:Functional trait-based approach is convenient for evaluating plant fireprofing capability, and is also vital for selecting fireprofing plant speices. In the present study, five plant functional traits, including specific leaf area (SLA), leaf dry matter content (LDMC), current year leaf water content (CYLWC), branch dry matter content (BDMC) and bark thickness (BT), and seven indices of fireproofing capability in fresh leaf materials were measured for 29 evergreen broad-leaved plants in Ningbo. Seven indices of fireproofing capability were grouped into two factors involving burning resistence (fa) (including burning resistence factor f1 and burning velocity factor f2) and combustibility (fb), and then related to each of five plant functional traits. Finally, the fireproofing capability was assessed. The results showed: 1) burning resistence factor f1 was significantly correlated with SLA and BT, burning velocity factor f2 was significantly correlated with BDMC, BT and CYLWC, burning resistence factor fa was significantly correlated with SLA, and combustibility factor fb was significantly correlated with LDMC, SLA and CYLWC. 2) SLA and LDMC were effective indices indicating fa and fb, as functional traits being simplified by partial correlation. 3) Similarity index was 0.8 for plants' fireprofing rank between trait\based and burning experiment\based assessments. In conclusion, easily measurable plant functional traits are useful approach to surrogate and to assess plant fireprofing and combustibility. 参考文献 相似文献 引证文献