Kuivlaiksuse esinemine õlikanepil erinevate väetustasemete juures
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Kuupäev
2026
Kättesaadavus
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool; Maaelu Teadmuskeskus
Abstrakt
Oilseed hemp (Cannabis sativa L.) has been considered relatively pest-free so far. Alternaria-
like symptoms were observed on the experimental field of oilseed hemp (cv
‘Finola’) in 2018. The aim of this research was to evaluate the resistance of hemp to
Alternaria leaf spot, and to assess the effects of nitrogen application rate (0–150 kg/ha),
fertilization method (at sowing vs. top dressing), fertilizer type (complex fertilizer vs.
ammonium nitrate) and sowing rate (20–40 kg/ha) on the variation of disease progression.
Within this study Alternaria leaf spot reduced leaf area, plant biomass and seed yield of
oilseed hemp. In addition, strong negative relationship (p<0.001) was found between
disease severity and nitrogen application rate. Although hemp biomass and seed yield
were significantly higher under top-dress fertilization, no clear relationship was observed
between fertilizer type, application timing and disease severity. Furthermore,
sowing rate had a statistically significant effect on the AUDPC value (p<0.001) in each
of the three experimental years. However, it was not a straight-forward trend, indicating
the existence of covariates such as annual weather conditions, plant biomass and related
field microclimate. Although warmer and drier seasons might suppress Alternaria
occurrence, the pathogen is progressively dispersing in the Northern climates. Under
changing climate conditions, continued research on oilseed hemp diseases in essential
to avoid the increased reliance on pesticides in the future. The role of endophytic microorganisms
within hemp microbiome should be considered, when explaining the effects
or developing management strategies.
Kirjeldus
Märksõnad
oilseed hemp, nitrogen fertilization, sowing rate, Alternaria leaf spot, endophytes, plant health, articles
Viide
Mäeorg, E., Lääniste, P., Nassar, H., Kännaste, A., Tedersoo, L., Niinemets, Ü., & Runno-Paurson, E. (2026). Kuivlaiksuse esinemine õlikanepil erinevate väetustasemete juures. Eesti Maaülikool; Maaelu Teadmuskeskus. https://doi.org/10.15159/AGR.26.16