Relationship between stable carbon isotope discrimination and water use efficiency under regulated deficit irrigation of pear-jujube tree

Ningbo Cui, Taisheng Du, Shaozhong Kang, Fusheng Li, Xiaotao Hu, Mixia Wang and Zhijun Li

Agricultural Water Management, 2009, vol. 96, issue 11, 1615-1622

Abstract: To investigate the relationship between stable carbon isotope discrimination ([Delta]) of different organs and water use efficiency (WUE) under different water deficit levels, severe, moderate and low water deficit levels were treated at bud burst to leafing, flowering to fruit set, fruit growth and fruit maturation stages of field grown pear-jujube tree, and leaf stable carbon isotope discrimination ([Delta]L) at different growth stages and fruit stable carbon isotope discrimination ([Delta]F) at fruit maturation stage were measured. The results indicated that water deficit had significant effect on [Delta]L at different growth stages and [Delta]F at fruit maturation stage. As compared with full irrigation, the average [Delta]L at different growth stages and [Delta]F at fruit maturation stage were decreased by 1.23% and 2.67% for different water deficit levels, respectively. [Delta]L and [Delta]F among different water deficit treatments had significant difference at the same growth stage (P

Keywords: Carbon; isotope; discrimination; Pear-jujube; (Zizyphus; jujube; Mill.); Regulated; deficit; irrigation; Water; use; efficiency (search for similar items in EconPapers)
Date: 2009
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Citations: View citations in EconPapers (9)

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