02164naa a2200349 a 450000100080000000500110000800800410001902400510006010000200011124501460013126000090027752010390028665000150132565000280134065000310136865000240139965000190142365000280144265000200147065000230149065000110151365000230152465300200154770000170156770000200158470000190160470000200162370000180164370000260166170000290168777300980171621335122021-08-12       2021    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1016/j.saa.2020.1188342DOI1 aBEDIN, F. C. B.  aNIR associated to PLS and SVM for fast and non-destructive determination of C, N, P, and K contents in poultry litter.h[electronic resource]  c2021  aAbstract: Using near-infrared (NIR) spectroscopy for poultry litter characterization can be a rapid, non-destructive, and low-cost alternative. This study aims to estimate the C, N, P, and K content in poultry litter samples using for first time NIR spectroscopy. For these purposes, the building models were carried out using Partial Least Squares (PLS) and Support VectorMachines (SVM)methods. A total of 160 litter sampleswere analyzed in poultry houses of different rearing systems, seeking the highest possible variability in their chemical composition. NIR spectroscopy, combinedwith PLS and SVMmethods, is an alternative method for non-destructive C, N, P, and K determination in poultry samples. The regression models using SVM provide better accuracy for all elements, laying the basis for the nonlinear regression approach's application. The K determination on poultry litter using NIR was possible only by the SVM model (R2 = 0.8620 and RPD = 2.7330). Conclusively, the predictive ability was improved using the SVM method.  aAviculture  aLitters (young animals)  aNear-infrared spectroscopy  aOrganic fertilizers  aOrganic wastes  aSupport vector machines  aAdubo Orgânico  aCama de Galinheiro  aFrango  aRaio Infravermelho  aOrganic manures1 aFAUST, M. V.1 aGUARNERI, G. A.1 aASSMANN, T. S.1 aLAFAY, C. B. B.1 aSOARES, L. F.1 aOLIVEIRA, P. A. V. de1 aSANTOS-TONIAL, L. M. dos  tSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopygv. 245, n. 118834, 2021.