Soil temperature and weather factors as key drivers of flowering phenology and nectar production in black locust (Robinia pseudoacacia L.) in Hungary

Porcsin, Alexandra and Ábri, Tamás and Déri, Helga and Zajácz, Edit and Bolla, Bence Kálmán and Szakálosné Mátyás, Katalin and Rédei, Károly Miklós and Keserű, Zsolt (2026) Soil temperature and weather factors as key drivers of flowering phenology and nectar production in black locust (Robinia pseudoacacia L.) in Hungary. JOURNAL OF FOREST SCIENCE, 72 (4). pp. 202-211. ISSN 1212-4834

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Abstract

The black locust (Robinia pseudoacacia L.) is the second most planted tree species worldwide, and the most common in Hungary. Phenotypic traits, particularly flowering patterns, are well-established indicators of the species' response to climate change. This study examined four forest subcompartments across three Hungarian regions: Northern-Central, Eastern and Southern-Central. The aim was to identify climatic factors correlating with the onset and duration of the flowering period. Additionally, the relationships between these factors and nectar weight and sugar concentration were defined. Results indicate a strong negative correlation between precipitation levels and flowering time: lower accumulated and average precipitation during the spring months of the preceding year was associated with a delayed flowering period in the following year (r = -0.922, r = -0.918, P = 0.05). However, when examining the 14-day period (r = 0.829) before blooming or examining from 1 January (r = 0.929, r = 0.890), the results indicate that other environmental factors may play a more dominant role. Furthermore, the number of chill and heat days was found to affect the starting date (R² = 0.819, R² = 0.765).

Tudományterület / tudományág

natural sciences > biological sciences

Faculty

Not relevant

Institution

Soproni Egyetem

Item Type:	Article
SWORD Depositor:	Teszt Sword
Depositing User:	Csaba Horváth
Identification Number:	MTMT:37082658
Date Deposited:	27 May 2026 08:23
Last Modified:	27 May 2026 08:23
URI:	http://publicatio.uni-sopron.hu/id/eprint/4061

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