Relationships between stable isotope natural abundances (δ¹³C and δ¹⁵N) and water use efficiency in rice under alternate wetting and drying irrigation in soils with high clay contents.

ABSTRACT: Natural abundance of the stable isotope (δ¹³C and δ¹⁵N) in plants is widely used to indicate water use efficiency (WUE). However, soil water and texture properties may affect this relationship, which remains largely elusive. Therefore, the purpose of this study was to evaluate δ¹³C as affected by different combinations of alternate wetting and drying irrigation (AWD) with varied soil clay contents in different organs and whole plant and assess the feasibility of using δ¹³C and δ¹⁵N as a physiological indicator of whole-plant water use efficiency (WUE_whole-plant). Three AWD regimes, I₁₀₀ (30 mm flooded when soil reached 100% saturation), I₉₀ (30 mm flooded when reached 90% saturation) and I₇₀

SUBMITTER: Wang Z 

PROVIDER: S-EPMC9756853 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature