2004•Xibei Linxueyuan xuebaoRequires access
Transpiration and drought resistance of poplar under different soil drought
Jianwei Yang, Ruilian Han, Shuming Liu, Liang Zong-suo
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Abstract
Under three soil water levels, i. e., fitted soil water content(7.0%) , medium(55%) and serious drought stress(40%),respectively. Transpiration characteristic and drought resistance adaptability by imitated soil drought of Loess plateau are studied. The results showed that the transpiration rate of poplar leaves is closely related to soil water content. The total water consumption and biomass are: fitted soil water contentmedium droughtserious drought, and total water use efficiency was highest at medium drought level; lowest at serious drought level; change of transpiration rate are affected syntheticly by environmental factors, the effect of air factors to transpiration rate is controlled by soil water content. The relation of drought resistance of poplar with superoxide dismutase (SOD) activity and K~+ content is not significant, indicating that poplar dose not have the character of drought resistance plants; From results, it can be concluded that poplar is not suitable to plant widely in loess plateau area and only fit to favorable soil water condition.