Maize Canopy Apparent Photosynthesis and ¹³C-Photosynthate Reallocation in Response to Different Density and N Rate Combinations.

ABSTRACT: Appropriate planting density and nitrogen (N) supply are critical factors optimizing yield in crop cultivation. To advance the knowledge of maize plants under different density and N rate combinations, responses of canopy apparent photosynthesis (CAP), and assimilate redistribution characters (by ¹³CO₂ stable isotope tracing) were investigated. In this study, two maize varieties DH618 and DH605 were grown at various planting densities (6.75, 8.25, 9.75, and 11.25 pl m^-2) and N application rates (0, 180, 270, 360, and 540 kg ha^-1) during 2013-2015. Maize grain yield (GY) was maximized at a density of 9.75 pl m^-2 with 180-360 kg ha^-1 N during the three study years. Maize GY, biomass, CAP, leaf area index (LAI), and ¹³

SUBMITTER: Wei S 

PROVIDER: S-EPMC6761910 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature