Carbon isotope discrimination and the factors affecting it in a summer maize field under different tillage systems.

ABSTRACT: Based on two years of field experiments, under different soil tillage methods and straw management practices, which included conventional tillage (CT), subsoiling (SS), rotary tillage (RT), and no-tillage (NT), combined with either straw return (S) or straw removal (0), we characterized the dynamic changes in Δ¹³C among three height layers [upper (U, 240 cm above the ground), middle (M, 120 cm above the ground), and lower (L, 30 cm above the ground)] of the summer maize canopy. The Δ¹³C, the factors affecting it, and the relationships between Δ¹³C and soil water content (SWC), the leaf area index (LAI), canopy microclimate, and the CO₂ concentration were elucidated. The results indicated that the Δ¹³C of summer maize at the pre-filling

SUBMITTER: Cui J 

PROVIDER: S-EPMC8842653 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature