The influence of water extracts of wild plants on the germination of cabbage seeds (Brassica oleracea var. capitata L.)

U ovom je završnom radu istraživan alelopatski utjecaj vodenih ekstrakata bilja kamilice (Matricaria chamomilla L.), koprive (Urtica dioica L.), maslačka (Taraxacum officinale F.H. Wigg), kore hrasta (Quercus sp.), stolisnika (Achillea millefolium L.), valerijane (Valeriana officinalis L.) te njihove mješavine na klijanje sjemena kupusa (Brassica oleracea var. capitata L.). Pokus je provođen u laboratorijskim uvjetima u Petrijevim zdjelicama. Korišteni su vodeni ekstrakti navedenih biljaka i njihove mješavine u koncentracijama od 50%, 20% i 5% glavnog ekstrakta. Klijavost je određivana 5. i 7. dana nakon početka pokusa. Osim klijavosti obavljeno je mjerenje duljine klijanaca (stabljike i korjenčića). Najviša koncentracija ekstrakta od 50% djelovala je inhibirajuće, a niže koncentracije od 20% i 5% su donekle stimulirale klijavost sjemena kupusa. Najbolje rezultate klijavosti pokazali su kopriva (20%-tni ekstrakt), maslačak (5%-tni ekstrakt) i valerijana (20%-tni ekstrakt) s 58% klijavosti, a najlošije kamilica (50%-tni i 20%-tni ekstrakt), maslačak (50%-tni ekstrakt) s 0% klijavosti te mješavina biljaka (50%-tni ekstrakt) s 10% klijavosti. Najveća duljina stabljike je zabilježena kod 20%-tnog ekstrakta maslačka s 33 mm, a najveća duljina korjenčića kod 5%-tnog ekstrakta maslačka s 39 mm.Allelopathic influence of water extracts of plants chamomile (Matricaria chamomilla L.), nettle (Urtica dioica L.), dandelion (Taraxacum officinale F.H. Wigg), oak bark (Quercus sp.), yarrow (Achillea millefolium L.), valerian (Valeriana officinalis L.) and their mixture on the germination of cabbage seeds (Brassica oleracea var. capitata L.) was researched in this paper. The experiment was set in laboratory conditions in Petri dishes. Water extracts of the aforementioned plants and their mixture was used in concentrations of 50%, 20% and 5% of main extract. The germination was determined 5 and 7 days after starting the experiment. Apart from the germination, measurements of the lengths of seedlings (stem and root) were done. The highest concentration of extracts of 50% was inhibitory and the lower concentrations of 20% and 5% were somewhat stimulatory on the germination of cabbage seeds. The best germination results were given by nettle (20% extract), dandelion (5% extract) and valerian (20% extract) with 58% germination, and the worst by chamomile (50% and 20% extract), dandelion (50% extract) with 0% germination and the plant mixture (50% extract) with 10% germination. The longest stem was measured in 20% extract of dandelion at 33 mm, and the longest root in 5% extract of dandelion at 39 mm