Diurnal and seasonal variation in leaf water content of Vigna umbellata in Karmana and Tashkent, Uzbekistan

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Cover: Current issues in veterinary medicine and animal husbandry and their solutions (Nukus, 13 November 2026)
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Published: 2026-11-13
DOI: https://doi.org/10.66073/ReFocus-Conf/1311141
Keywords:
Vigna umbellata, leaf water content, plant introduction, diurnal variation, seasonal variation, water balance, Karmana, Tashkent

Main Article Content

Makhfuza Pardayevna Nazaraliyeva
Denov Institute of Entrepreneurship and Pedagogy
https://orcid.org/0009-0009-9588-6097 (unauthenticated)

Abstract

This study compared diurnal and seasonal changes in leaf water content of Vigna umbellata grown in Karmana District, Navoi Region, and Tashkent City during 2024–2025. Leaf water content, expressed as a percentage of fresh mass, was measured every two hours from 08:00 to 20:00 on observation dates from May to August in Karmana and May to September in Tashkent. Data were analysed descriptively, with site comparisons based on matching months and observation times. Tashkent showed higher water content at every matched time point in both years. The largest differences occurred at 20:00 in June: 6.5 percentage points in 2024 and 6.7 in 2025. Diurnal variation was greater in Karmana, except in June 2025, when the range was 2.9 percentage points compared with 4.0 in Tashkent. Evening water content remained below morning levels on all eight observation dates in Karmana but equalled or exceeded them in May and June in Tashkent. These findings highlight the importance of considering observation time, daytime minima, and evening recovery when comparing leaf water status between sites.

Article Details

Issue

Vol. 1 No. 10 (2026): Current issues in veterinary medicine and animal husbandry and their solutions

Section

Sustainable development of agriculture
Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Nazaraliyeva, M. P. (2026). Diurnal and seasonal variation in leaf water content of Vigna umbellata in Karmana and Tashkent, Uzbekistan. Partner Conferences of the International Scientific Journal Research Focus, 1(10), 657-662. https://doi.org/10.66073/ReFocus-Conf/1311141

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