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林业资源管理 ›› 2019›› Issue (2): 142-146.doi: 10.13466/j.cnki.lyzygl.2019.02.021

• 研究简报 • 上一篇    下一篇

昆明地区15种常绿森林木本植物离体叶的失水特征

李世友1,2(), 罗静1, 张桥蓉1, 蒋婷1, 王昆伦1, 王秋华1,2, 胡燕娥1   

  1. 1.西南林业大学 消防学院,昆明 650224
    2.云南省森林灾害预警与控制重点实验室,昆明 650224
  • 收稿日期:2019-01-06 修回日期:2019-03-31 出版日期:2019-04-28 发布日期:2020-09-22
  • 作者简介:李世友(1971-),男,湖北麻城人,副教授,博士,研究方向为森林防火。Email: lsy0703@163.com
  • 基金资助:
    国家自然科学基金项目(31260180)

Water Loss Characteristics of Excised-leaves of 15 Evergreen Woody Plants in Kunming,Yunnan Province

LI Shiyou1,2(), LUO Jing1, ZHANG Qiaorong1, JIANG Ting1, WANG Kunlun1, Wang Qiuhua1,2, HU Yane1   

  1. 1. School of Fire Science and Technology,Southwest Forestry University,Kunming 650224,China
    2. Key Laboratory of Forest Disaster Warning and Control,Kunming 650224,China
  • Received:2019-01-06 Revised:2019-03-31 Online:2019-04-28 Published:2020-09-22

摘要:

基于特定条件下昆明地区阔叶林与云南松林、华山松林、地盘松林同样易燃的现象,选择昆明地区15种常见常绿木本植物的离体叶为研究对象,测定了鲜叶质量和在80℃干燥箱中0.5h,1h,1.5h,2h,3h,4h,5h,17h共8个时刻的质量,计算各时段的平均失水率、平均失水速率和各时刻平均含水率,分析了离体叶的失水特征。结果表明:15种离体叶失水速率均呈现出先快后慢的变化趋势,3种针叶保水能力强于12种阔叶。从失水角度看,3种针叶失水慢于12种阔叶,阻燃性强于后者。植物离体叶在热作用下的失水速率可以作为评价植物燃烧性的一个指标。

关键词: 昆明地区, 木本植物, 离体叶, 失水速率, 失水特征

Abstract:

Based on the phenomenon that the broad-leaved forest was as flammable as Pinus.yunnaneneis forest,P.armandii forest,P.yunnanensis var. pygmaea forest under certain conditions,the excised-leaves of 15 evergreen woody plants collected from Ternstroemia gymnanther,Illicium simonsii,Camellia pitardii,Cinnamomum glanduliferum,Rhododendron siderophyllum,Castanopsis orthacantha,Lithocarpus mairei,Cyclobalanopsis glaucoides,Rhododendron spinuliferum,Myrica nana,R.decorum,Michelia yunnanensis,P.yunnaneneis,P.armandii,P.yunnanensis var. pygmaea respectively were sampled to study the water loss characteristics in Kunming,Yunnan province.The mass of each fresh samples and its mass heated in 0.5h,1h,1.5h,2h,3h,4h,5h,17h at 80 ℃ were weighed.The water loss characteristics of 15 samples were analyzed according to the water loss rate of each sample in each period,the water loss rate of each sample in each second and absolute moisture content of each sample in each period.The results showed that the water loss rate of 15 samples was fast firstly then turned to be slow and coniferous leaf samples hold water better than broad-leaved samples.From the perspective of water loss,3 kinds of coniferous leaves were slower than 12 kinds of broad leaves and the flame retardancy was opposite.The water loss rate of excised-leaves under the action of heat can be used as an indicator to evaluate the plants combustibility.

Key words: Kunming area, woody plant, excised-leaf, rate of water loss, water loss characteristics

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