| 微生物结皮层对地表蒸发过程影响的机理研究 |
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| 引用本文： | 周丽芳,阿拉木萨.微生物结皮层对地表蒸发过程影响的机理研究[J].水土保持学报,2010,24(1). |
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| 作者姓名： | 周丽芳 阿拉木萨 |
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| 作者单位： | 1. 中国科学院沈阳应用生态研究所,沈阳110016;中国科学院研究生院,北京100039
2. 中国科学院沈阳应用生态研究所,沈阳,110016 |
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| 基金项目： | 国家自然科学基金项目(30671723); 辽宁省科学技术基金博士启动基金(20051009) |
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| 摘 要： | 对流沙土壤和林地土壤分别进行覆盖结皮和模拟降水处理,结皮选择苔藓和藻类结皮,观测不同处理的蒸发过程,并将结皮对地表蒸发的影响(即结皮效应)分解为封闭效应和截持效应,分析两种效应各自的变化特点及其关系,探讨结皮对地表蒸发的影响。研究发现:(1)结皮封闭效应和截持效应均呈现阶段性变化,封闭效应表现为先抑制蒸发后促进蒸发,截持效应表现为先促进蒸发后抑制蒸发;(2)在整个蒸发过程和不同蒸发阶段,两种效应均为负相关关系,对蒸发的影响是相反的,且存在主导与非主导的关系,不同蒸发阶段主导效应不同,导致结皮效应呈阶段性变化;(3)不同降水条件下,结皮对蒸发过程产生不同影响,较大降水条件下,结皮主要表现为对蒸发的抑制作用,较小降水条件下,因土壤基质的差异表现出不同。
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| 关 键 词： | 微生物结皮 地表蒸发 封闭效应 截持效应 |
Mechanism of Microbiotic Crust Effects on Evaporation Process |
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| ZHOU Li-fang,A Lamusa.Mechanism of Microbiotic Crust Effects on Evaporation Process[J].Journal of Soil and Water Conservation,2010,24(1). |
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| Authors: | ZHOU Li-fang A Lamusa |
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| Institution: | ZHOU Li-fang1,2,A Lamusa1 (1.Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,2.Graduate School of the Chinese Academy of Sciences,Beijing 100039) |
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| Abstract: | In order to study how microbiotic crust influenced evaporation process,by covering moss/algae crust and simulating precipitation on sand soil and woodland soil,evaporation process with different treatments was observed and the crust effect on evaporation was decomposed into the sealing effect and the retention effect. Their variation characteristics were analyzed respectively and the relationship between them were investigated. Three conclusions can be concluded. (1) Both the Sealing effect and the retentio... |
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| Keywords: | microbiotic crust evaporation process sealing effect retention effect |
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