Seed allelopathy effect in vegetable celery crops

Allelopathic effect of aqueous extract (2.5, 5.0, and 10.0 %) from donor seeds ( Apium graveolens cultivar Kupidon, Petroselinum crispum cultivar Lyubasha, Pastinaca sativa cultivar Kulinar, Anethum graveolens cultivar Kentavr) on seed germination in testers Raphanus sativus, Lactuca sativa, Brassica chinesis var. japonica, Lepidium sativum, Brassica juncea was examined in laboratory experiment (distilled water used as a control). For all tested crops, a negative general adaptability was characteristic. For fennels and celeries, the strong, but unstable allelopathy was detected. They completely depressed seed germination in some crops, including salad and watercress salad. Parsley and parsnip were less active, but had more stable allelopathic effect. The most stable results were obtained in control. Donor and tester relationship can be used in mathematical modelling to study the allelopathy phenomenon by statistical methods.