Weather conditions affect the physiological features of the Lupinus angustifolius L. development when using biological products
A.P. Kislitsyna, A.Y. Sofronova
Section: Agroecology
We assessed the climatic factor effect on the manifestation of two agricultural practices for the Lupinus angustifolius. The first was inoculation of lupine seeds with a Rhizoverm preparation of nodule bacteria. The second one was treatment of seeds and crops with a complex growth-stimulating preparation PolyminТМ Boron-Molybdenum. The experiment was conducted for 2 years varied considerably in the precipitation amount and temperature conditions. The weather in 2023 was moderately humid (moisture index – 1.29), but precipitation during the summer season was extremely uneven. The weather in 2024 was arid (moisture index – 0.68). The leaves pigments’ amount (LPA) during the mass flowering phase in lupine varied in different years. The LPA closely related to the accumulation of dry matter by the phytomass in the phase of gray-green beans (r=0.96) in favorable water-temperature conditions. The level of the above-mentioned relationship corresponded to the average values, r=0.43 (p≤0.05) in drought conditions. There was 227% precipitation from the climatic norm in July 2023. Due to vegetative overgrowth of L. angustifolius plants in warm and rainy weather during flowering and seed formation, the seed yield was 0.8–0.93 t/ha, versus 0.6 t/ha in the control. Seeds inoculation with Rizoverm combined with the crops treatment with PolyminТМ Boron-Molybdenum during the growing season (the budding phase) was the most effective method that provided 55% increase in seed yield compared to the control (+0.33 t/ha). In atmospheric and soil drought in 2024, there was no reliable effect of the growth regulator, as well as the inoculation of seeds or their combined use on the pigment content in leaves and the productivity. The L. angustifolius seeds yield according to the experimental variations was 0.82–0.87 t/ha.
ISSN 1995-4301
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