Physiological Mechanism of Leaf Water Use of Winter Wheat

doi:10.3321/j.issn:1000-7091.2004.04.012

Abstract

Abstract: The pot experiments were conducted in greenhouse under dif ferent soil moisture contents to ana-l yses the response of flag leaf w ater use ef ficiency of w inter w heat to soil moisture contents. Combining the field condit ions, the relat ionships betw een f lag leaf w ater use eff iciency, light intensity, concent rat ion of CO₂ and the photosynthet ic rate, stomatal conductance, interstellar CO₂ concentration and transpirat ion rate of w inter wheat w ere determined. The results indicated there w as a close relat ionship of f lag leaf w ater use eff iciency with the determined physiolog ical factors, and flag leaf w ater use eff iciency had a crit ical value of soil moisture contents, light intensity, and concentrat ion of CO₂.

Key words: Winter wheat, Water use efficiency, Physiological mechanism.

CLC Number:

S512.11

ZHANG Xi-ying1,CHEN Su-ying1,DONG Bao-di. Physiological Mechanism of Leaf Water Use of Winter Wheat[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2004, 19(4): 42-46. doi: 10.3321/j.issn:1000-7091.2004.04.012.

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