Effect of leonardite humate as a priming agent on the yield and quality of radish under open-field conditions

Nikolaeva, A.A.; Filippova, O.I.; Khusnedtinova, T.I.; Kulikova, N.A.

Авторы: Nikolaeva A.A., Filippova O.I., Khusnedtinova T.I., Kulikova N.A.
Сборник: Book of Abstracts. Ninth International Conference of the CIS IHSS on humic innovative technologies "Humic substances and green technologies" (HIT-2024)
Тезисы
Год издания: 2024
Место издания: Non-Commercial Partnership “Center for Biogenic Resources “Humus Sapiens” (NP CBR “Humus Sapiens”) Москва
Первая страница: 96
Последняя страница: 96
Аннотация: Currently, a transition to environmentally sound technologies of crops cultivation that do not harm the environment is of urgent issue. Therefore, it is relevant to search for new approaches and materials in the field of agriculture that allow increasing crop yields.Seed priming has been numerously reported to be a promising way to increase crop productivity due to promoting the rapid germination and emergence of seedlings, and increasing resistance to stress in various adverse environmental conditions. Various substances are used as priming agents, in particular, humic substances. They are multifunctional biostimulants protecting plants from environmental stress. Though many laboratory studies demonstrated beneficial effect of priming, field experiments are still lacking. The results of laboratory studies often cannot be extrapolated to field conditions, so the result of a field experiment can be unexpected. The aim of the study was to assess the effect of Sakhalin humate (SH) as a priming agent on the yield and quality of radish crops.Radish seeds (Raphanus raphanistrum ssp. sativus L, cv. “Sophit”) were used for the study. In laboratory conditions, optimal seed priming conditions (SH concentration, duration and temperature of priming) were determined using Box-Behnken design. The field experiments were conducted on Urban Technosol (pH 7.4, 38 g/kg OС, 570 mg P2O5/kg and 172 mg K2O/kg). Radish crop was harvested at the 24th day after sowing (DAS) or at the 32nd DAS. During radish cultivation, the rate of germination was monitored. At the end of the experiment, germination, weight of root crops were estimated, and yield was calculated. To assess the quality of root crops, the content of dry matter, pigments (carotenoids and chlorophyll), sugars and ascorbic acid were measured.Depending on the optimized parameter (vigor index, germination, root and shoot length), the optimal concentration of SH for priming radish seeds lay in the range from 0.5 to 1.0 g/l. For the field experiment, a concentration of 0.5 g/l HS was used, at which optimal germination values were obtained. SH treatment reduced the final germination of radish in field conditions, while the yield did not differ significantly from the control. Depending weather conditions, the content of sugars or ascorbic acid changed due to seed priming with SH indicating partial adaptation of plants to unfavorable temperature and water conditions.The conducted studies showed lack of SH efficiency as priming agents in the case of using priming as the only method of stress mitigation.Acknowledgements. This research was funded by the Federal budget of the Russian Federation (CIT&S no. 121041300098-7).References1.Canellas L., Canellas N., Irineu L., Olivares F. Plant chemical priming by humic acids. Chemical and Biological Technologies in Agriculture, 2020, 7. https://doi.org/10.1186/s40538-020-00178-4.2.Poomani S., Yadav S., Choudhary R., Singh D., Dahuja, A., Yadav S.K. Seed priming with humic acid modifies seedling vigor and biochemical response of lentilunder heat stress conditions. Turkish Journal of Agriculture and Forestry, 2023, 47. https://doi.org/10.55730/1300-011X.3147.
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