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应用生态学报 ›› 1995, Vol. 6 ›› Issue (3): 251-254.

• 研究论文 • 上一篇    下一篇

沿海防护林防海煞危害初探

王述礼1, 孔繁智1, 关德新1, 诸德新2, 孙美清2, 王华胜3   

  1. 1. 中国科学院沈阳应用生态研究所, 沈阳 110015;
    2. 大连市林业局科技中心, 大连 116001;
    3. 大连市甘井子区林业水利局, 大连 116033
  • 收稿日期:1995-03-20 修回日期:1995-05-08 出版日期:1995-07-25 发布日期:1995-07-25
  • 基金资助:

    国家“八五”科技攻关专题“沿海防护林体系生态经济效益评价技术”研究内容之一

Protection effect of salt damage by coastal windbreak forest

Wang Shuli1, Kong Fanzhi1, Guan Dexin1   

  1. Institute of Applied Ecdegy, Academia Sinica, Shenyang 110015
  • Received:1995-03-20 Revised:1995-05-08 Online:1995-07-25 Published:1995-07-25

摘要: 通过后牧村海岸防护林带附近空气中主要盐离子飘尘(即海煞)的观测分析表明,林带对大气盐尘有吸附和截留作用,无林带地区平均沉降量为4.34μg·m-3·100m-1,通过林带时为18.40644g·m-3·100m-1.林带的吸附量与树种、枝叶形状有关,侧柏对Cl-和Na+的吸附量分别为6330和3350mg·kg-1,而黑松为1570和950mg·kg-1.空气中盐尘受天气条件特别是风速的影响。阴天,风速越大,空气中盐尘含量越大,输送距离越远。

关键词: 海防林, 盐离子, 盐尘, 农田土壤, 重金属, 化学形态, 潜在生态风险指数, 风险评估编码法(RAC)

Abstract: Observation and analysis of salty dust in the air near coastal windbreak forest show thatatmospheric salty dust can be intercepted and adsorbed by the windbreaks, its mean subsidence amount is 4.3μg· m-3·100m-1in the region without windbreaks, and is 18.4μg·m-3·100m-1in the region with ones.The adsorption amount of it by the windbreaks la related to the tree species and their size of branches and leaves.The adsorption amount of Cl- and Na+ by Platycladus orientalis is 6330 and 3350mg· kg-1,but that by Pines thunforii is 1570 and 950 mg· kg-1 The atmospheric salty dust is depended on the weatherand wind speed.On cloudy day, the greater wind speed is,the higher salt content in theair and the farther transported distance are.

Key words: Coastal windbreak forest, Salt ions, Salty dust, risk assessment code method., heavy metal, chemical speciation, agricultural soil, potential ecological risk index