Optimal nitrogen regimes compensate for the impacts of seedlings subjected to waterlogging stress in summer maize

• DOI: 10.1371/journal.pone.0206210
• Publication Date: 2018-10-23T21:31:31Z
• Authors: Wenming Wu; Shiji Wang; Hongjian Chen; Youhong Song; Lin Zhang; Chen Peng; Lili Jing; Jincai Li
• Keywords: Waterlogging (archaeology); Photosynthetic capacity

A field experiment was performed to explore the compensation effects of different nitrogen (N) regimes on growth and photosynthetic capacity in leaf layers summer maize hybrid LuYu9105 under waterlogging at seedling stage. The results showed that significantly decreased maximum green area (gLA) by 10.0~15.3% 9.3~22.5%, mainly due reduction below-ear layer leaves silking stage 2014 2015, respectively. Waterlogging also ear rate (PN), Fv/Fm, Fv/Fo, ΦPSII qP mid- late-filling stages, which accompanied a duration grain-filling (T) 2.6~5.9%, thus resulting loss grain yield 7.0~18.5%. Interestingly, shift N from basal application topdressing big flare shown compensate adverse through increased gLA above-ear layer, as well greater rate, an increase 9.9~27.0% 17.8~25.8% compared other treatments. Therefore, this study optimal during are capable compensating for impacts caused