风沙静电场对植物茎秆液流传输过程影响的理论分析

doi:10.7522/j.issn.1000-694X.2013.00258

摘要/Abstract

摘要：

风沙流对植物生理过程具有非常重要的影响,但是对其影响机理目前并无相关理论模型给予解释。本文基于植物茎秆的刚性导管模型讨论了风沙静电场对植物茎流速率的影响。结果表明:随着外部电场增强,茎流速率指数增加,即外部电场越强,水分输运速度越快;植物茎秆导管半径越大,水分输运速度越快,且电场的影响越明显。本文结果在一定程度上解释了风沙流胁迫对植物的影响远大于净风影响的实验结果,可为沙化地区的植被保护提供一定的帮助。

关键词: 风沙流, 电场, 茎流速率, 植物生理

Abstract:

Wind-blown sand has an important effect on plant physiological processes, but there is no any theoretical model to explain its mechanism. Based on the rigid conduit model of the plant stem, this paper discusses the effect of wind-sand electrostatic field on the speed of plant sap flow. The numerical result shows that with the increasing of external electric field, the sap flow rate corresponding exponentially increases, accordingly the stronger external electric field, the faster the water transport; with the increasing of conduit radius, the water transport rate increases, and the effect of environment electric field on plant sap flow is more obvious. To some extent, these results can explain why the effect of wind-blown sand on plant is larger than that of the net wind, and it will provide some helps for the vegetation protection on arid areas.

Key words: wind-blown sand, electric field, sap flow rate, plant physiological processes

中图分类号:

Q945.79

李兴财1,2,3, 赵宁1. 风沙静电场对植物茎秆液流传输过程影响的理论分析[J]. 中国沙漠, 2013, 33(6): 1731-1734.

LI Xing-cai1,2,3, ZHAO Ning1. A Theoretical Analysis of the Effect of Wind-blown Sand Electrostatic Field on Vegetation Physiological Processes[J]. JOURNAL OF DESERT RESEARCH, 2013, 33(6): 1731-1734.

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