Resumo

COTO FONSECA, Alberto Francisco  e  ROJAS GONZALEZ, Alejandra María. Comparativa multi e hiperespectral del pasto Cynodon nlemfuensis bajo condiciones tropicales y de pastoreo con ganado lechero. Ingeniería [online]. 2022, vol.32, n.1, pp.1-18. ISSN 2215-2652.  http://dx.doi.org/10.15517/ri.v32i1.46129.

Spectral information has been widely applied to study the growth and nutritional conditions of different crops used in the agricultural field; however, there is a research gap regarding forage crops in tropical conditions. This study compared the multi and hyperspectral information of the African star pasture crop (Cynodon nlemfuensis) for dairy cattle feeding using field spectroscopy and satellite information of Sentinel-2. This study determined spectral signature heterogeneity of this crop due to the randomness of the feeding pattern of the cattle and the continuous change of the environmental conditions. Different crop heights in the sampling areas affected the reflectance values, leaf area index and vegetation indices directly. For the NDVI and SAVI, R2 values of 0,725 and 0,446 were achieved for spectral indices between field and satellite data. This research is relevant because it lays the baseline for the use of spectral information regarding the analysis of tropical pastures employed in dairy cattle feeding using remote sensing and a field spectroradiometer.

Palavras-chave : NDVI; SAVI; SENTINEL 2-MS; Spectral Signature; Spectroradiometry.

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