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Estimation of allelopathic potential of perennial grasses

100%

Kryzeviciene A., Paplauskiene V.

Zeszyty Problemowe Postępów Nauk Rolniczych

2004

tom 496

nr 1

Laboratory and field tests of 4 grass species: meadow grass (Poa pratensis L.), perennial ryegrass (Lolium perene L.), timothy (Phleum pratense L.), and meadow fescue (Festuca pratensis HUDS.) were conducted at the Lithuanian Institute of Agriculture during 1998-2000. We investigated the effects of aqueous extracts of the above-ground organ and of roots of the above-mentioned grass species on the germination of garden radish (Raphanus sativus L.), red clover (Trifolium pratense L) and white clover (Trifolium repens L.). The extracts were also analysed for the total content of phenolic compounds. Our experimental evidence suggests that, irrespective of the growth stage, the extracts of the above-ground organ of grasses had a much stronger effect (especially negative) on the germination of tested plant species compared with root extracts. During the generative stage of grasses the inhibitory effect was more pronounced. It reached its critical point at mass flowering stage when the seeds of tested species germinated either poorly or did not germinate at all (red clover). At this growth stage of grasses the content of total phenolic compounds was also the highest. Red clover was the most sensitive to the effect of grass extracts, while the least sensitive was garden radish. The effect of root extracts on the germinating clover was more often stimulating rather than inhibitory. Under field conditions the effect of different grass species on germination of undersown clover, and especially on the establishment during the first growth days, was diverse and most adverse late in spring, during inflorescence emergence or beginning of flowering.

Ograniczanie wyników

1 Zeszyty Problemowe Postępów Nauk Rolniczych

1 Kryzeviciene A.

1 Paplauskiene V.

1 2004

Wyniki wyszukiwania

Estimation of allelopathic potential of perennial grasses