Optimizing irrigation and nitrogen rate can enhance the grain yield in both main and ratoon rice crop.

ABSTRACT: Ratoon rice enhances yield per unit area through efficient resource use, but the interactive effects of irrigation regime and nitrogen (N) rate on its productivity remain unclear. A two-year field experiment was conducted to assess the effects of two irrigation regimes-conventional flooding irrigation (CF) and alternate wetting and moderate soil drying irrigation (WMD)-combined with five N application rates on yield, agronomic productivity, root oxidation activity (ROA), soil chemical properties, and N use efficiency (NUE) in the rice cultivar Liangyou 6326. The results showed that compared with CF, WMD increased spikelets number per panicle, total spikelet number, and filled grain rate in both main and ratoon crop, thereby enhancing the yields by 11.0% and 16.1%, respectively. These impro

SUBMITTER: Zhang Q 

PROVIDER: S-EPMC12434168 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature