Yem Bezelyesinin Çimlenme ve Fide Özellikleri Üzerine Düşük Sıcaklık ve Ekim Tarihlerinin Etkileri

Abstract

In the study reported here, six forage pea cultivars Töre, Taşkent, Özkaynak, Ulubatlı, Ürünlü, and Gölyazı were examined at different temperatures 20 °C (i.e., control), 15 °C, and 10 °C and sowing dates October 1, October 15, and November 1 in Eskişehir condition, to determine their cold tolerance during germination and as early seedling stages. Results included that survival rates varied among cultivars and by sowing date, with the highest rate achieved by Töre (98.2%) and the lowest (87.9%) by Ulubatlı; however, the high survival rates of the Töre, Taşkent, Özkaynak, Ürünlü, and Gölyazı varieties did not differ significantly. Early sowing negatively affected the survival rates of the Ulubatlı and Gölyazı cultivars more than the others. Survival rate correlated negatively with plant height and number of nodes but correlated positively with SPAD value and leaf relative water content. Gölyazı achieved the highest germination rate (92.8%) and Ulubatlı the lowest (81.8%), although the high rates of the Gölyazı, Töre, Taşkent, and Özkaynak cultivars did not significantly differ. Low temperatures adversely affected all observed characteristics, and seedling lengths highly paralleled survival rates obtained in field conditions. Taken together, such findings suggest that purple-flowered cultivars tolerate low temperatures better than white-flowered ones.