Allelopathic effects of water extracts of Sorghum halepense (L.) Pers., Convolvulus arvensis L. and Cirsium arvense Scop. on early seedling growth of some leguminous crops

Abstract

In order to study the allelopathic effect of aboveground dry biomass of Sorghum halepense, Convolvulus arvensis and Cirsium arvense on seed germination and early seedling growth of Pisum sativum (L.), varieties Mir (winter form) and Kerpo (spring form); Vicia sativa (L.), variety Tempo, and Medicago sativa (L.), variety Dara, a laboratory experiment was conducted at the Institute of Forage Crops - Pleven. Four concentrations: 1.25, 2.5, 5.0 and 10.0% were applied to each weed biotype used to study allelopathic effects. The results showed that weed extracts significantly decreased germination percentage, shoot and root length (cm), shoot and root weight (g), and seed vigor index (SVI1 and SVI2) of the tested species. In general, the variable effects are related to the weed species and extract concentrations.

Kako bi se proučio alelopatski uticaj suve biomase nadzemnih delova biljaka Sorghum halepense, Convolvulus arvensis i Cirsium arvense na klijanje semena i početni razvoj izdanaka Pisum sativum (L.), var. Mir (ozima) i Kerpo (jara); Vicia sativa (L.), var. Tempo, i Medicago sativa (L.), var. Dara, izveden je laboratorijski eksperiment u Institutu za krmno bilje - Pleven. Četiri koncentracije - 1.25, 2.5, 5.0 i 10.0% - primenjene su na svaku korovsku vrstu kako bi se proučio alelopatski uticaj. Rezultati su pokazali da su ekstrakti korova značajno smanjili procenat klijanja, dužinu izdanaka i korena (cm), težinu izdanaka i korena (g) i indeks vigora semena (SVI1 i SVI2) testiranih vrsta. Uopšte, promenljivost delovanja zavisi od korovske vrste i koncentracije ekstrakta.