| The influence of water stress on photosynthesis characteristics and water use efficiency in Jujube in Tarim Basin |
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| DOI：10.7606/j.issn.1000-7601.2012.03.30 |
| Key Words: jujube water stress photosynthesis characteristics water use efficiency Tarim Basin |
| Author Name | Affiliation | | WAN Sumei | College of Plant Sciences, Tarim University, Alar, Xinjiang, 843300, China | | HU Shoulin | College of Plant Sciences, Tarim University, Alar, Xinjiang, 843300, China | | GAO Xianmin | Agricultural Technology Extension Station, Xinjiang Production and Construction Corps, Urumqi 830000, China | | WEN Qinglin | College of Plant Sciences, Tarim University, Alar, Xinjiang, 843300, China |
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| Abstract: |
| The diurnal variation of photosynthetie eharacteristics in jujube field in Tarim Basin under water stress was monitored using portable LI-6400 photosynthesis system at the stage of full fruit. The results showed that the curves of diurnal variation in Pn(net photosynthetic rate)and Tr(transpiration rate)had single peaks; Pn, PAR(photosyn-
thetically active radiation), RH(relative humidity), Ta(atmospherie temperature)and Ca(CO2 concentration in the field)differed significantly amongst four
water treatments at 0.01 level; WUE(water use efficiency)differed significantly amongst four water treatments at 0.5 level, whereas there was no difference in Tr. Based on tendency of changes of photosynthesis characteristics and WUE, it was speculated that jujube could adapt to extreme
arid condition, dry condi-tion, and the proper water amount of drip irrigation was about 320 m3/667m2. |
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