Deep nitrogen fertilizer placement improves the yield of summer maize (Zea mays L.) by enhancing its photosynthetic performance after silking.

ABSTRACT:

Background

Effective nitrogen (N) fertilizer management can improve photosynthetic performance of maize and enhance the grain yield. However, the effects of the deep placement of N on post-silking photosynthetic performance in maize and its relationship with grain filling are limited. The study was a split-plot design with N application rates as the main plots and N placement depths as sub-plots. The N application rates consisted of 225, 191.25, and 157.5 kg ha^- 1 and N placement depths consisted of 5 and 15 cm, respectively. The growth parameters, photosynthetic capacity, subcellular ultrastructure, antioxidant system in maize leaves, and grain filling characteristics were measured.

Results

Increasing the N placement depth counteracted the adverse effects of redu

SUBMITTER: Cheng Y 

PROVIDER: S-EPMC11808948 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature