欢迎访问林业科学,今天是

林业科学 ›› 2012, Vol. 48 ›› Issue (12): 128-133.doi: 10.11707/j.1001-7488.20121220

• 研究简报 • 上一篇    下一篇

植物4种水势测定方法的比较及可靠性分析

柏新富, 卜庆梅, 谭永芹, 朱建军   

  1. 鲁东大学生命科学学院 烟台 264025
  • 收稿日期:2011-11-14 修回日期:2012-11-06 出版日期:2012-12-25 发布日期:2012-12-25

Comparison and Analysis of Four Methods Used in Measuring the Plant Water Potential

Bai Xinfu, Bu Qingmei, Tan Yongqin, Zhu Jianjun   

  1. College of Life Sciences, Ludong University Yantai 264025
  • Received:2011-11-14 Revised:2012-11-06 Online:2012-12-25 Published:2012-12-25

关键词: 水势, 压力室法, 原位法, 叶圆片法, 小液流法

Abstract:

The results and characteristics of water potential measurements with four different methods, namely the Chardakov method, Pressure chamber, in situ hygrometry and leaf disc hygrometry were compared on several plants species. Experimental results showed that the former 3 methods produced similar results, but the leaf disc hygrometry yielded significant different results from the other 3 methods. Further investigation showed that the results with the leaf disc hygrometry varied considerably with the equilibrium time and was not able to show the actual water potentials of the plants. The Chardakov method was time-consuming, and its efficiency was very low. Pressure chamber was able to provide accurate and reliable measurements of plant water potentials if the sample water loss could be avoided and the repetitious samples were available. While the in situ hygrometry showed the merits such as more reliable results, non-destructive to plants, no harsh prerequisites for plants and could measure the same spot of a plant continuously.

Key words: water potential, pressure chamber (Scholander bomb), in situ hygrometry, leaf disc hygrometry, chardakov method

中图分类号: