南京林业大学学报(自然科学版) ›› 2008, Vol. 32 ›› Issue (03): 131-134.doi: 10.3969/j.jssn.1000-2006.2008.03.031

• 研究简报 • 上一篇    下一篇

水分胁迫下3种榆树幼苗生理变化与抗旱性的关系

夏尚光1,张金池1,梁淑英1,2   

  1. 1. 南京林业大学森林资源与环境学院, 江苏 南京 210037; 2. 安徽省滁州市环保局, 安徽 滁州 239500
  • 出版日期:2008-06-18 发布日期:2008-06-18

Relationship between drought resistance and physiological change of three elm trees seedling under water stress

XIA Shang-guang1, ZHANG Jin-chi1, LIANG Shu-ying1,2   

  1. 1. College of Forest Resources and Environment Nanjing Forestry University, Nanjing 210037, China; 2. Chuzhou Environment and Protection Bureau, Chuzhou 239500, China
  • Online:2008-06-18 Published:2008-06-18

摘要: <正>设计了一种锯链锯切木材时可实时动态测量主切削力、进给力和侧向力的八角环式三向测力传感器。通过对主切削力和进给力方向的标定,分析研究贴片位置对被测方向灵敏度、非线性度的影响,以及对非被测方向交叉灵敏度的影响。修改进给力方向的贴片位置,使交叉灵敏度由3.2×10-6N11下降到4.27×10-7N-1,进给力测试系统的非线性度由原来的7.8%下降到0.025%。主切削力、进给力、侧向力等各测力方向的灵敏度分别为5.51×10-6N-1、6.45×10-6N-1和4.05×10-5N-1。

Abstract: The experiment was carried out with one-year-old seedling of three elm trees. Under artifical arid condition the changes of relative water content (RWC), wilting coefficient (WC), chlorophyll content (Chl), activity of catalase (CAT), proline(Pro), solvable sugar(SS) and MDA in their leaves were determined. Pro,SS and MDA might be taken as reference indexes of drought-resistanced appraisal for Ulmus thomasii Sarg., U. crassifolia and U. pumila through principal component analysis.

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