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Remote sensing for response to Nitrogen fertilizer in maize
  • Brandon Webster,
  • Addie Thompson
Brandon Webster
Department of Plant Biology, Michigan State University

Corresponding Author:[email protected]

Author Profile
Addie Thompson
Plant Resilience Institute, Michigan State University, Department of Plant, Soil & Microbial Sciences, Michigan State University


Modern maize hybrids prolong the period that they photosynthesize and accumulate Nitrogen (N) out of the soil which has helped them produce more yield per unit of N fertilizer. However, the increase in post flowering activity is inversely correlated with N remobilization from the leaves. Further gains in N response could be achieved by breaking this association, but doing so requires an in-depth understanding of the temporal dynamics of maize canopy traits and plant N mobilization. Leaf nutrient samples were collected at five time points and remote sensing phenotypes were extracted from Unoccupied Aerial System (UAS) imagery (orthomosiacs and point clouds). Spectral indices and point-cloud based metrics were used to investigate the relationship between changes in N storage dynamics and yield among hybrids grown in low and high N treatments. From these combined phenotypes, it is possible to dissect how rate of growth and canopy health help to describe hybrid response N and also provide clues for how to break the negative relationship between yield and N remobilization.
30 Oct 2023Submitted to NAPPN 2024
30 Oct 2023Published in NAPPN 2024