<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The application of biological active preparations (BAPs) and remote-sensing control in the management of agronomic intervention are an important part of successful crop cultivation. The effects of foliar application of two BAPs (containing amino acids or Abiestins<sup>®</sup>) on yield and yield-forming, as well eco-physiological traits calculated from infrared thermographs data (crop water stress index, CWSI and index of stomatal conductance, Ig) of three hybrids of sunflower were studied in field poly-factorial experiments, realised during two years (2012 and 2013). The results showed that the application of selected BAPs has contributed to an increase of the sunflower yield, in particular through an increase in the weight of thousand seeds (<italic>rp</italic> = 0.761, <italic>P</italic> &lt; 0.001). Similarly, oil content in achenes was significantly higher in treatments with BAPs, mainly with preparation containing free amino acids. The study describes the quantitative relationship between yield and quality of sunflower production (<italic>rp</italic> = −0.41, <italic>P</italic> &lt; 0.01). Selected hybrids of sunflower in two growth stages showed the significant differences in CWSI and Ig (both at <italic>P</italic> &lt; 0.01), respectively. An analysis of negative linear relation between the yield of achenes and CWSI (<italic>rp</italic> = −0.654, <italic>P</italic> &lt; 0.001) confirmed that higher value of plant stress resulted in a smaller yield and vice-versa. The opposite trend was observed between yield and Ig index (<italic>rp</italic> = 0.576, <italic>P</italic> &lt; 0.001). The data obtained from IR thermography can be used for monitoring the physiological health of sunflower plants, as well in potential prediction and control of yield.</p></abstract>

The application of biological active preparations (BAPs) and remote-sensing control in the management of agronomic intervention are an important part of successful crop cultivation. The effects of foliar application of two BAPs (containing amino acids or Abiestins®) on yield and yield-forming, as well eco-physiological traits calculated from infrared thermographs data (crop water stress index, CWSI and index of stomatal conductance, Ig) of three hybrids of sunflower were studied in field poly-factorial experiments, realised during two years (2012 and 2013). The results showed that the application of selected BAPs has contributed to an increase of the sunflower yield, in particular through an increase in the weight of thousand seeds (rp = 0.761, P < 0.001). Similarly, oil content in achenes was significantly higher in treatments with BAPs, mainly with preparation containing free amino acids. The study describes the quantitative relationship between yield and quality of sunflower production (rp = −0.41, P < 0.01). Selected hybrids of sunflower in two growth stages showed the significant differences in CWSI and Ig (both at P < 0.01), respectively. An analysis of negative linear relation between the yield of achenes and CWSI (rp = −0.654, P < 0.001) confirmed that higher value of plant stress resulted in a smaller yield and vice-versa. The opposite trend was observed between yield and Ig index (rp = 0.576, P < 0.001). The data obtained from IR thermography can be used for monitoring the physiological health of sunflower plants, as well in potential prediction and control of yield.

Analysis of relations between crop temperature indices and yield of different sunflower hybrids foliar treated by biopreparations

Slovak University of Agriculture in Nitra, Slovak Republic

Agriculture (Pol'nohospodárstvo)

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The application of biological active preparations (BAPs) and remote-sensing control in the management of agronomic intervention are an important part of...

Analysis of relations between crop temperature indices and yield of different sunflower hybrids foliar treated by biopreparations

Published Online: May 12, 2016

Page range: 28 - 40

Received: Nov 23, 2015

DOI: https://doi.org/10.1515/agri-2016-0004

Keywords
infrared thermography, CWSI, yield, oil content, foliar preparations, sunflower

© 2016 Marek Kovár et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Analysis of relations between crop temperature indices and yield of different sunflower hybrids foliar treated by biopreparations

Published Online: May 12, 2016

Page range: 28 - 40

Received: Nov 23, 2015

DOI: https://doi.org/10.1515/agri-2016-0004

Keywordsinfrared thermography, CWSI, yield, oil content, foliar preparations, sunflower

© 2016 Marek Kovár et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
infrared thermography, CWSI, yield, oil content, foliar preparations, sunflower