Published in Scientific Papers. Series B, Horticulture, Vol. LXV, Issue 1
Written by Valentin PANCHEV, Valeria IVANOVA, Nikolay PANAYOTOV
The main purpose of the present study was to determine the effect of ultrasound treatment of seeds of different lupine species of the genus Lupinus on their sowing qualities. The experiments were carried out with seeds of two species of lupine (Lupinus polyphyllus Lindl.) and tarwi (Lupinus mutabilis Sweet.). The treatment of the seeds was performed with ultrasound, testing the following sound durations: 3, 6 and 9 minutes. Germination energy, germination, mean germination time and uniformity of germination, length of hypocotyls and embryo root, fresh and dry matter of seedlings were studied. Sonication with a duration of 6 minutes causes the highest increase of germination. As a result of treatment, the fresh weight of seedlings also increases. Polynomial regressions with high coefficients of determination about the effect of ultrasound on germination energy and germination were found. A higher effect was observed in the species Lupinus polyphyllus Lindl. It is recommended to improve the sowing qualities of lupine seeds to apply the sonication of 6 minutes.
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