[Evaluation of nutrient release profiles from polymer coated fertilizers using Fourier transform mid-infrared photoacoustic spectroscopy]

Guang Pu Xue Yu Guang Pu Fen Xi. 2012 Feb;32(2):330-3.
[Article in Chinese]

Abstract

The acrylate-like materials were used to develop the polymer coated controlled release fertilizer, the nutrients release profiles were determined, meanwhile the Fourier transform mid-infrared photoacoustic spectra of the coatings were recorded and characterized; GRNN model was used to predict the nutrients release profiles using the principal components of the mid-infrared photoacoustic spectra as input. Results showed that the GRNN model could fast and effectively predict the nutrient release profiles, and the predicted calibration coefficients were more than 0.93; on the whole, the prediction errors (RMSE) were influenced by the profiling depth of the spectra, the average prediction error was 10.28%, and the spectra from the surface depth resulted in a lowest prediction error with 7.14%. Therefore, coupled with GRNN modeling, Fourier transform mid-infrared photoacoustic spectroscopy can be used as an alternative new technique in the fast and accurate prediction of nutrient release from polymer coated fertilizer.

MeSH terms

  • Acrylates
  • Fertilizers*
  • Fourier Analysis
  • Nitrogen
  • Phosphorus
  • Polymers
  • Spectrophotometry, Infrared
  • Spectroscopy, Fourier Transform Infrared*
  • Spectrum Analysis

Substances

  • Acrylates
  • Fertilizers
  • Polymers
  • Phosphorus
  • acrylic acid
  • Nitrogen