Please login first

Monitoring a calcium biofortification workflow in an orchard of Pyrus communis var. Rocha applying precision agriculture technology
* 1, 2 , 3, 4 , 3, 4 , 3, 4 , 3, 4 , 3 , 4, 5 , 3, 4 , 3, 4 , 3, 4 , 3, 4 , 3, 4 , 3, 4 , 4, 6 , 4, 7 , 4, 7 , 6 , 4, 7 , 4, 6 , 3, 4
1  Earth Sciences Department, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa. Campus da Caparica, 2829-516 Caparica, Portugal
2  GeoBioTec Research Center, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa. Campus da Caparica, 2829-516 Caparica, Portugal
3  Earth Sciences Department, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus da Caparica, 2829-516 Caparica, Portugal
4  GeoBioTec Research Center, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus da Caparica, 2829-516 Caparica, Portugal
5  Escola Superior de Educação Almeida Garrett (ESEAG-COFAC), Av. Campo Grande 376, 1749-024 Lisboa, Portugal
6  PlantStress & Biodiversity Lab, Centro de Estudos Florestais (CEF), Instituto Superior Agronomia (ISA), Universidade de Lisboa, Quinta do Marquês, Av. República, 1349-017 Lisboa, Portugal
7  Instituto Nacional de Investigação Agrária e Veterinária I.P. (INIAV), Av. República, Quinta do Marquês, 2780-157 Oeiras, Portugal

https://doi.org/10.3390/IECAG2021-09661 (registering DOI)
Abstract:

Smart farming techniques can be used to maximize food production. This can be achieved by rapid detection of variations in crops and clever use of resources such as water and fertilizers, which might minimize crop stress through direct target practices. In an orchard located in the West region of Portugal (GPS coordinates 39°23’28.997’’N; 9°4’52.483’’W), a Ca biofortification workflow with 7 foliar sprays of CaCl2 (4 kg.ha-1 and 8 kg.ha-1) was used to increase Ca contents in “Rocha” pear trees. During the biofortification process, an Unmanned Aerial Vehicle synchronized by GPS, was used to characterize the orchard regarding it`s morphology (slope) and to monitor trees (NDVI - Normalized Difference Vegetation Index). These data were correlated with Ca content (assessed by X-Ray fluorescence analysis) and photoassimilates synthesis (assessed by leaf gas exchange measurements). The orchard showed no major slopes and after 4 sprays with CaCl2, NDVI values revealed no major differences between the control and sprayed trees. Accordingly, leaf gas exchange parameters did not reveal negative impacts in the photoassimilates synthesis of the sprayed trees, although in the leaves Ca content significantly increased. The use of precision agriculture techniques in correlation to other analysis to assess plant stress is discussed.

Keywords: Biofortification; Calcium; Leaf gas exchange; NDVI; Pears; Precision Agriculture; X-Ray fluorescence analysis
Top