影响树木生长高度因素的研究

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1、存档编号赣南师范学院学士学位论文影响树木生长高度因素的研究教学学院:物理与电子信息学院届别:2011届专业:物理学学号:070800068姓名:颜熠乔指导老师:钟握军完成日期:2011.513目录摘要·················································································3关键词········································································

2、·······3Abstract·················································································3Keywords··············································································3引言······································································

3、·····················1.根压对树木生长高度的影响1.1根压现象1.2根压的特征1.3影响根系吸水的土壤条件1.3.1土壤中的可用水分1.3.2土壤的通气状况1.3.3土壤温度1.4根压的两种解释·············································2.毛细现象对树木生长高度的影响···············································2.1附加压强··································

4、···············132.2上升高度···············································1.实例对比···························································3.1桐花树的简介3.2高度计算3.3结果分析2.蒸腾作用对树木生长高度的影响···························································4.1蒸腾作用的方式·············

5、··············································4.2蒸腾拉力······························3.总结····················································6.参考文献··························································································7.致谢摘要：本文通过对树木中水的吸收与运输

6、过程的描述，讨论与分析影响树木生长高度的三个主要因素：毛细现象、蒸腾作用、根压。通过理论的分析与计算，测算出水在树木中上升的高度，由此推测树木的高度，并将理论数据与某种树木的实际高度相比较，分析其中的差异，做出定性的结论。关键词：毛细现象；蒸腾作用；根压；水的运输Abstract:Basedonthetreesinthewaterabsorptionandtransportationprocessdescription,discussionandanalysisoftreegrowthheightofthre

7、emainfactors:13capillarity,transpiration,rootpressure.Throughtheoreticalanalysisandcalculation,estimatedincreaseinwaterheightinthetrees,whichindicatedthattheheightofthetrees,andsomekindoftheoreticaldataandcomparetheactualheightofthetreestoanalyzethedifferen

8、ces,tomakequalitativeconclusions.Keywords:Capillarity；transpiration；rootpressure；watertransport.引言美国亚利桑那州立大学的乔治·科赫博士率先爬上世界最高的5棵树进行水分输送测量。其中最高的一棵是生长在美国加利福尼亚州、有“世界第一高树”美誉的红巨杉,此树高112.7米,与30多层高的大厦相当。在这些树的顶