Allelopathic effects of new alien species Sagittaria graminea on three plant species.
The allelopathy of Sagittaria graminea aqueous extract on the recipient plants Cucurnis sativus Linn, Avena sativa, and Pisum sativum L, was studied by bioassay. The results showed that Sagittaria graminea aqueous extract had allelopathic inhibitory effects on the germination rate, germination potential and seed vigor of the seeds of the three plants within the scope of the test, while the growth performance of the seedlings of Avena sativa was "low and high". Phenomenon that when the concentration of the extract solution was 0.025 g/mL, the extract had an effect on the seedling height of Avena sativa, and the root length and seedling height of other herbages were all inhibited to varying degrees, and the allelopathic inhibitory effect was observed. Increases with the concentration of the solution. Sagittaria graminea aqueous extract had the strongest allelopathic inhibitory effect on Cucurnis sativus Linn. The comprehensive effect values of Cucurnis sativus Linn reached 100 with 0.075 g/mL and 0.1 g/mL Sagittaria graminea extracts.