article · Acta agriculturae Slovenica
Field trials evaluated how foliar sprays of salicylic acid, irrigation scheduling, and plant spacing affect the growth, yield, and quality of two sugar beet cultivars, Samba and Farida. Applying 100 ppm salicylic acid 30 days after planting, followed by a second spray 14 days later, notably altered top fresh mass and root biomass. Extending the interval between planting and the first irrigation produced significant differences in fresh mass, sugar yield, sucrose percentage, and juice purity. Planting densities also altered outcomes: a spacing of 60 by 20 centimetres enhanced root fresh mass, total soluble solids, and purity, whereas a tighter 60 by 15 centimetre spacing delivered the highest top fresh mass, root yield, and sugar yield in the initial season. Combining the 60 by 20 centimetre spacing with salicylic acid applied at 30 days produced the greatest overall improvements, particularly for the Farida cultivar.
Optimising crop management practices can directly enhance root yield and sugar extraction quality in commercial sugar beet farming. By identifying specific planting densities, irrigation intervals, and timing for growth-promoting sprays such as salicylic acid, growers can improve production efficiency and crop quality without requiring extensive modifications to existing field operations.
These findings provide applied agronomic guidance for commercial sugar beet growers and agricultural extension officers seeking to improve yield and sucrose purity. The techniques rely on standard field methods, such as adjusting planting spacing, scheduling irrigation, and applying commercially available salicylic acid sprays. Because the trials reflect field-tested agricultural practices, the protocols are near-market and can be adapted into operational field management regimes.
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Two field experiments were conducted to evaluate the time of foliar application of 100 ppm salicylic acid (SA), two irrigation (IR) timings, three levels of spacing (SP) hill-1 with different plant density on growth, yield and quality characters of two sugar beet cultivars (‘Samba’ and ‘Farida’). The results revealed that the foliar application of 100 ppm SA at 30 days after planting (DAP) and 14 days after the first application significantly influenced top fresh mass and root biomass of sugar beet plants. Conversely, the increasing period between planting and first irrigation scheduling led to significant differences in fresh mass, sugar yield, and sucrose % as well as purity % of sugar beet. Plants density with 60 × 20 cm spacing hill-1 was found to be better than the other two spacings for major characters, particularly root fresh mass, and Total soluble solids and purity %. Inversely, spacing at 60 × 15 cm, between hills gave the maximum levels of top fresh mass, root yield and sugar yield in the first season. The interaction effect between spacing hill-1 at 60 × 20 cm and 100 ppm SA applied at 30 DAP gave the maximum levels of increment for most of the studied characters, particularly for cultivar ‘Farida’.
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DOI: 10.14720/aas.2020.115.2.1159
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