| 对树液上升动力的探讨和比较 |
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| 引用本文： | 欧可宗.对树液上升动力的探讨和比较[J].大学物理,2004,23(2):11-12. |
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| 作者姓名： | 欧可宗 |
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| 作者单位： | 西昌学院,工程系,四川,西昌,615013 |
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| 摘 要： | 提出树液上升有三种驱动力:毛细现象、渗透压和负压.对这三种驱动力的大小进行计算和比较,指出树液上升的主要驱动力是分子距离增大处于拉伸状态后形成的负压.
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| 关 键 词： | 毛细现象 渗透压 负压 比较 |
| 文章编号： | 1000-0712(2004)02-0011-02 |
| 修稿时间： | 2003年1月14日 |
Comparison of three driving forces causing the transportation of the sap |
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| OU Ke-zong.Comparison of three driving forces causing the transportation of the sap[J].College Physics,2004,23(2):11-12. |
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| Authors: | OU Ke-zong |
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| Abstract: | It is pointed out that there are three types driving forces causing the transport of sap.A calculation is made and the three types of driving forces are compared each other.It turned out that the primary one is the negative pressure formed by molecular force. |
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| Keywords: | capillarity osmotic pressure negative pressure |
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