The purpose of the researches is represented of determination of allopathic effect   realized of Lolium perenne L. on perennial graminaes Festuca rubra L., Dactylis glomerata L. and Poa pratensis L. In the vegetal preparation of Lolium perenne L. have been found compounds with allopathic character which corresponds to some other researches realized on global level. The studied biologic material is represented of four perennial graminaes species: Dactylis glomerata L., Lolium perenne L., Poa pratensis L. and Festuca rubra L., studied in laboratory conditions and in vegetation pots. The experience have been established in three repetitions. Excepting the witness that have been watered only with running water, the other vegetation pots have been splashed with deafly alcoholic pirolizidinici alkaloids white extract, respectively ergotic  obtained from the aerial vegetal part of Lolium perenne L. specie. The estract have been applied in three different shots, shot of 10 ml/pot, 40 ml/pot and 80 ml/pot. The novelty degree of the paper and personal contribution results from the fact that on national level, perennial graminaes that have been studied have not been completely characterized from allopathic point of view. Between the factors that threaten the biodiversity and to which must get the profile research are allelochemical compounds. Their structure and their way of action are different and can built start points for realizing new herbicides. The paper importance results from the fact that through these experiments, have been proved the alkaloids influence (on changing the quality parameter of plants that have been studied) did reflected through an a small decrease on crude protein contain.

perennial graminaes; allelopathy; lolinici acizi; crude protein

Presentation: oral