Resumo

TIEDEMANN, José Luis. Relating the aerial forage biomass productivity of wheat varieties (Triticum aestivum L.) to digital camera-derived chromatic coordinates. Ecol. apl. [online]. 2018, vol.17, n.1, pp.61-68. ISSN 1726-2216.  http://dx.doi.org/10.21704/rea.v17i1.1174.

The aerial forage biomass productivity (AFBP) of wheat varieties (Triticum aestivum L.) was quantified and compared using ANAVA in a facility located at Colonia El Simbolar, Santiago del Estero, Argentina. AFBP of the varieties were related to digital camera-derived chromatic coordinates and from the data lineal models were adjusted. Significant differences in the accumulated AFBP (which ranged from 4.4 and 5.6 tn ms ha^-1) among varieties were not found. On the contrary, significant differences were found in the AFBP of the third (R² = 0.55; p² = 0.47; p^-1) and Gladiator (1.1 tn ms ha^-1 ) varieties those with the highest productivity: Strong inverse (r -0.99; r -0.88) and straight (r 0.96) relationships were found among the AFBP of the varieties and the integrate chromatic coordinate Σcct. It is highlighted that the simple chromatic coordinate Σcct (red) showed strong inverse relationship with the AFPB of the varieties Yarara and Gladiator with a r -0.99 for both varieties. The lineal models adjusted by the AFPB and the chromatic coordinate presented a high explanatory power with a R²Aj ranging between 0.71 and 0.99. The digital camera-derived chromatic coordinates allow for the aerial forage biomass productivityof wheat varieties to be quantified easily and economically.

Palavras-chave : RGB; near sensor; lineal models; chromaticity.

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