Investigation on water consumption characteristics and water use efficiency of poplar under soil water deficits on the Loess Plateau

被引：65

作者：

Liang, Zong-Suo

Yang, Han-Wei

Shao, Hong-Bo ^{[1
]}

Han, Rui-Lian

机构：

[1] Qingdao Univ Sci & Technol, Coll Mol & Chem Engn, Dept Biol, Qingdao 266042, Peoples R China

[2] Chinese Acad Sci, Ctr Soil & Water Conservat & Ecoenvironm Res, Yangling 712100, Peoples R China

[3] NW Sci Tech Univ Agr & Forestry, Yangling 712100, Peoples R China

[4] Chinese Acad Sci, Ctr Natl Water Saving & Irrigat Yangling, Yangling 712100, Peoples R China

[5] Chongqing Univ Post & Telecommun, Bioinformat Coll, Chongqing 400065, Peoples R China

[6] Nanyang Normal Coll, Dept Biol, Nanyang 473061, Peoples R China

来源：

COLLOIDS AND SURFACES B-BIOINTERFACES | 2006年 / 53卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Populus simonii; water consumption; soil water deficit; water use efficiency (WUE); drought; water-saving; ecological restoration;

D O I：

10.1016/j.colsurfb.2006.07.008

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

The water consumption characteristics and water use efficiency (WUE) of poplar (Populus simonii) were investigated under the condition of three different soil water regimes, which were 70%, 55% and 40% of field capacity (FC), respectively. The results showed that water potential, water content, photosynthetic rate, WUE of leaves, and plant growth rate decreased significantly with reduction in soil water content. At the level of adequate and medium soil water content, rapid growth and biomass accumulation in poplar occurred during May and June, whereas this phenomenon occurred only during May under severe soil drought condition. Total water consumption and biomass growth were the greatest under adequate soil water condition, decreased under medium soil drought condition, and lowest under severe soil drought condition. Total WUE was the highest under medium soil water condition and lowest under severe soil condition. Changing patterns of water consumption for daily rate, every 10-day rate, and month rate were quite different under these three soil water regimes. For all these three treatments, the highest monthly water consumption rate occurred during July and June. The highest water consumption over a 10-day period was during in the second 10 days of July, the first 10 days of July, and the last 10 days of June for these three treatments, respectively. The day for the highest water consumption in the medium and severe drought treatments occurred I or 2 months earlier than the adequate soil water treatment. The daily time for the greatest water consumption was different throughout the life span of poplar under these soil water levels. According to these results, we concluded that poplar did not have the characteristics of drought-resistance plants, and we do not recommend that this tree species be planted over a wider range of the Loess Plateau in China. (C) 2006 Published by Elsevier B.V.

引用

页码：23 / 28

页数：6

共 25 条

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