Primary Research on the Wettabil ity of Leaves of Selected Plants in Shaanxi Province

SHI Hui; LI Jun-yi

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Primary Research on the Wettabil ity of Leaves of Selected Plants in Shaanxi Province

- Primary Research on the Wettabil ity of Leaves of Selected Plants in Shaanxi Province
- Bulletin of Soiland Water Conservation Vol. 28, Issue 3, Pages: 202-205(2009)
- 作者机构：
  
  西安建筑科技大学环境与市政工程学院,陕西,西安,710055
- 作者简介：
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- Published：2009
- 稿件说明：
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SHI Hui, LI Jun-yi. Primary Research on the Wettabil ity of Leaves of Selected Plants in Shaanxi Province[J]. Bulletin of Soiland Water Conservation, 2009, 28(3): 202-205.
DOI：

SHI Hui, LI Jun-yi. Primary Research on the Wettabil ity of Leaves of Selected Plants in Shaanxi Province[J]. Bulletin of Soiland Water Conservation, 2009, 28(3): 202-205. DOI：

摘要

植物叶片的润湿性表现了叶片对水的亲和能力，叶片上润湿的一层水膜对植物的光合作用、叶片截流降水有重要的影响。测定了陕西省境内34种植物叶片对水的接触角，初步探讨了叶片润湿性的一些特征。所研究植物叶片正面的接触角为0°~140°，平均85.4°。接触角大于95°不润湿的植物占到测定总数的31.4%；小于85°润湿植物中占到51%以上；而介于润湿与不润湿之间的物种占17.1%。叶片的正面和背面的润湿性具有一定水平的差异。叶面角质与腊质的比例对润湿性有重要的影响。叶片上附属物的多少也会对润湿性产生影响，附属物愈多，润湿性愈差；人为去除附属物可以极大地增加叶片的润湿性能。植物叶片上的气孔和叶脉通过影响叶片的粗糙程度来影响叶片的湿润性。

Abstract

The wettability of plant leaves

reflects the affinity about the water to leaves

and the water membrane on a leaf has the key influences on photosynthesis and rainfall interception.Contact angles of water were measured for 35 species plants in Shaanxi Province

and the wettability of leaves was researched primarily.Contact angles of adaxial leaves were 0%一14%

with an averaged 85.40°.According to contact angle

the plant species that are non-wettability or repellency with the value more than 95° was 31.4%of total measurements;the species with contact value less than 85° was more than 51%of the total;and there were 17.1%plant with contact angle of 85°-95°

which means that the wettability of the leaves lies between wetness and repellency.For a plant leaf

the wettability on adaxial and reverse leaves was somewhat different.The ratio of cuticle to wax of plant leaf had significance to leaf wettability.The degree of subsidiary hair on a leaf had influence to wettability and the wettability of the leaf became worse along with the subsidiary increased.If the subsidiary hair was rejected

the wettability of leaf would become better.The stoma and vein on the leaf affected the wettability through increasing the roughness of plant leaf.

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