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何謂水分潛勢 (water potential)?水分潛勢主

何謂水分潛勢 (water potential)?水分潛勢主要由那些成分所決定?

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  • 1 decade ago
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    1.水分潛勢 (water potential)是指水相對於純水(如去離子水)的位能

    可以用來衡量水從一個區域因滲透或重力或機械等驅動因素移動至另一個區域的傾向

    2.通常訂標準溫度和壓力下的純水的水分潛勢 (water potential)為0

    3.加入水中的溶質會降低水分潛勢 (water potential)--更負,而增加壓力會增加水分潛勢 (water potential)--更正

    4.在條件許可時--如以半透膜為隔離界面--水會從高水分潛勢 (water potential)區流向水分潛勢 (water potential)區

    參考網頁:

    http://en.wikipedia.org/wiki/Water_potential

    2008-08-22 23:51:23 補充:

    漏字補充:

    4.在條件許可時--如以半透膜為隔離界面--水會從較高水分潛勢 (water potential)區流向較低水分潛勢 (water potential)區

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