Temperature-driven yield variation of super hybrid rice across ecological regions: mitigation by nitrogen management and genotype selection.

ABSTRACT: Improving rice productivity remains essential under land constraints and rising food demand. However, spatial yield variation of super hybrid rice across agroecosystems and the mechanisms driving it is not fully resolved. We evaluated how thermal regimes, nitrogen management and genotype jointly shaped yield differences of super hybrid rice across two ecological regions. Field experiments (2021-2022) used three super-hybrid cultivars - Liangyoupeijiu (LYPJ), Y-liangyou-1 (YLY1) and Y-liangyou-900 (YLY900) - under four N rates (0, 150, 240, and 330 kg ha^-1) at Longhui and Changsha. Averaged across varieties and years, grain yield in Longhui exceeded Changsha by 16.8% (2021) and 26.7% (2022). These site differences were associated with higher temperatures in Changsha during panicl

SUBMITTER: Li J 

PROVIDER: S-EPMC12946190 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature