Resumo

SHANG, ZH  e  XU, SG. Allelopathic testing of Pedicularis kansuensis (Scrophulariaceae) on seed germination and seedling growth of two native grasses in the Tibetan plateau. Phyton (B. Aires) [online]. 2012, vol.81, n.1, pp.75-79. ISSN 1851-5657.

Abstract. Pedicularis kansuensis is a dominating poisonous weed, and it might have allelopathic effects on other native grasses in al­pine meadows. An experiment was conducted to examine a range of concentrations of aqueous whole plant extracts (25, 12.5, 2.5, 1.25, 0.25 and 0.0 g/L) of P. kansuensis, prepared at the flowering stage on seed germination and seedling growth of two native grasses (Poa pra­tensis and Elymus nutans). High concentrations of aqueous extracts of P. kansuensis inhibited seed germination and seedling growth of P. pratensis (p< 0.05). Most aqueous extracts of P. kansuensis had a stimulatory (p< 0.05) effect on E. nutans. Our results suggest that the allelopathic ecology of P. kansuensis on other native grasses needs further experiments.

Palavras-chave : Biological allelopathy; Aqueous extracts; Weeds; Native grasses; Alpine meadows.

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