WINTER WHEAT SEED GERMINATION DEPENDS ON PRE-SOWING TREATMENT WITH GROWTH REGULATORS

I. D. Zhilyak, H. Ya. Slobodianyk, О. I. Zabolotnyi

Abstract


Modern technologies for growing grain crops require the use of environmentally safe measures and methods. The pre-sowing treatment of wheat seeds necessitates the correct choice of drugs with a wide spectrum of influence on the morphological and physiological indicators of seedlings. From 2019 to 2022, the effectiveness of pre-sowing treatment of winter wheat seeds was studied using the growth regulators 1-naphthyl-acetic acid (25 ml/l), succinic acid (0.025 % solution), and the organo-mineral preparation Fulvohumin (1 % solution) both separately and in combination: 1-naphthyl-acetic acid + Fulvohumin, 1-naphthyl-acetic acid + succinic acid, succinic acid + Fulvohumin, and 1-naphthyl-acetic acid + succinic acid + Fulvohumin. The working solution consumption was 10 liters per ton of seeds. Treated winter wheat seeds were germinated for eight days at a temperature of +20°C. Laboratory seed germination, biometric parameters, and dry and wet weight of seedlings were determined and statistically analyzed.
It was established that succinic acid significantly increases seed germination by 11 %, but seedlings treated with succinic acid showed slightly smaller seedling length and raw weight than the control.
Pre-sowing treatment of winter wheat seeds with Fulvohumin significantly increases laboratory seed germination (up to 95 %), root length, and total seedling length. This treatment resulted in a 34.5 % increase in the dry weight of seedlings compared to the control. The highest content of dry matter was observed after seed treatment with a mixture of 1-naphthyl-acetic acid + Fulvohumin + succinic acid, reaching 17.4 %. The combination treatment with Fulvohumin + succinic acid produced the tallest seedlings (14.12 cm) and the greatest raw weight (131.39 mg). A significant increase in raw and dry mass of 8-day-old seedlings was noted after seed treatment with the mixture of 1-naphthyl-acetic acid + succinic acid.
However, pre-sowing treatment of winter wheat seeds with only 1-naphthyl-acetic acid (0.025 % solution) was not effective, as it did not significantly increase germination (only by 1.3 %). Additionally, seedlings treated with 1-naphthyl-acetic acid had the shortest root length (4.99–5.78 cm). Therefore, the use of Fulvohumin enhances the effectiveness of growth regulators such as succinic acid and 1-naphthyl-acetic acid.

Keywords


1-naphthyl-acetic acid; succinic acid; Fulvohumin; laboratory seed germination; seedling length; wet and dry weight of seedlings

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DOI: https://doi.org/10.25128/2078-2357.24.1.9

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