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林业科学 ›› 2008, Vol. 44 ›› Issue (8): 145-148.doi: 10.11707/j.1001-7488.20080826

• 论文 • 上一篇    下一篇

持续干旱胁迫对女贞形态与生长的影响

黄 华1.2 梁宗锁2 韩蕊莲2   

  1. (1. 河南科技大学农学院 洛阳 471003; 2. 中国科学院水土保持研究所 杨凌 712100)
  • 收稿日期:2007-07-09 修回日期:1900-01-01 出版日期:2008-08-25 发布日期:2008-08-25

Effects of Drought Stress on Morphology and Growth of Ligustrum lucidum

Huang Hua1,2,Liang Zongsuo2,Han Ruilian2   

  1. (1. College of Agronomy,Henan University of Science & Technology Luoyang 471003; 2. Institute of Soil and Water Conservation,Chinese Academy of Science Yangling 712100)
  • Received:2007-07-09 Revised:1900-01-01 Online:2008-08-25 Published:2008-08-25

关键词: 女贞, 形态, 生长, 干旱, 胁迫

Abstract:

Responses of morphology and growth of Ligustrum lucidums were investigated to drought stress using pottedplant in Yangling, China. Two water treatments were used by artificially controlling soil moisture. One was normal water supply (70% of the maximum soil moisture), and the other was severe water deficit (30% of the maximum soil moisture). The results showed that severe water deficit significantly affected the growth rate, leaf characteristic, branching pattern, biomass and their distribution of the tree species. On severe water deficit condition, the survival ratio of the seedlings did not decrease notably. The growth of leaves area was obviously hampered on drought stress. The biomass was reduced in the drought stressed seedlings, compared with the control. The leaf dry weight decreased, whereas the stem biomass dry weight increased. The growth of branch of the seedlings was changed in response to the drought stress. Both total branch number and total branch length were decreased, and their bifurcation ratio was also decreased. The outer branches number, which is very important for photosynthesis, significantly descended with the reduced length. However, the root shoot ratio remained unchanged.

Key words: Ligustrum lucidums, morphology, growth, drought stress