High N availability decreases N uptake and yield under limited water availability in maize.

ABSTRACT: Water and nitrogen (N) are the most limiting factors to plant productivity globally, but we lack a critical understanding of how water availability impacts N dynamics in agricultural systems. Plant N requirements are particularly uncertain when water is limited because of the interactive effect of water and N on plant growth, N demand, and plant uptake. We investigated impacts of N application and water availability on plant growth and N movement, including above and belowground growth, water productivity, N productivity, N uptake, N recovery, and greenhouse gas emissions within a semi-arid system in northeastern Colorado, USA. Moderately high soil N availability depressed grain yield and shoot growth under both limited and full water availability, despite no indication of physical toxicit

SUBMITTER: Flynn NE 

PROVIDER: S-EPMC10471730 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature