Improvement of physiological indices of growth and root yield of sugar beet through seed hydropriming and foliar application of humic acid under delayed planting conditions

Document Type : Research Paper

Authors

1 Agronomy Department, Faculty of Agriculture, Bu-Ali Sina University

2 Sugar Beet Research Department, Hamedan Agricultural and Natural Resources Research and Education Center, AREEO, Hamedan, Iran.

10.22034/saps.2023.56557.3044

Abstract

Background & Objective: This study was conducted with the aim of investigating the interaction of planting date, hydropriming of seeds and humic acid foliar application on the growth physiological indices and root yield of sugar beet.
Materials & Methods: The research was conducted as a split plot factorial based on a randomized complete block design with three replications. The main factor was planting dates (March 25, April 8 and 22, May 6) and hydropriming (primed and unprimed) and humic acid (water and humic acid spray) were factorially placed in sub-plots.
Results: The effect of planting date, hydropriming and humic acid foliar were significant on the growth indices and root yield. Planting date had the greatest effect and the highest maximums of leaf area index and crop growth rate, net assimilation rate, relative growth rate and root yield were related to March 25th planting date and the lowest were obtained on May 6th planting date. On the last planting date, hydropriming alone caused an increase of 17.5% and 24.4% relative growth rate and tuber yield, respectively, compared to the treatment water spraying without hydropriming.
Conclusion: If both seed hydropriming and humic acid foliar spraying are done at the same time, it will increase plant growth indices and improve root yield. In case of a 6-week delay in planting (planting on May 6), separate application of hydropriming is preferable to spraying humic acid, and their combination use can completely compensate for the effects of a 2-week delay in planting.

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JOURNAL OF AGRICULTURAL SCIENCE AND SUSTAINABLE PRODUCTION

Articles in Press, Accepted Manuscript
Available Online from 21 October 2024

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