The invention discloses a construction method for summer corn
nitrogen content monitoring model based on
canopy spectrum information. According to the method, four kinds of summer corn
nitrogen content monitoring models are constructed by taking original spectral
reflectivity and first derivative spectrum most sensitive band, an optimal band combination and optimal spectrum index as basis by performing
test analysis on the change characteristics of summer corn
plant canopy spectral
reflectivity in different fertilizing levels by a mini
lysimeter, researching the response relation between the summer corn
plant canopy spectral
reflectivity and a first derivative and
nitrogen content thereof, screening a sensitive band for corn canopy nitrogen content monitoring, and determining an optimal band combination is determined, and meanwhile, screening optimal
spectral index; the four kinds of summer corn nitrogen content monitoring models are calibrated by model evaluation index, and
verification is performed by using
field plot test data, so as to confirm an optimal monitoring model. The monitoring model can be used for monitoring the nitrogen content of summer corn in the whole growth period, and has important theoretical and practical meaning for realizing large-scale
crop nitrogen content non-destructive monitoring and precise water and
fertilizer management.