Determination of Some Physical Properties of Some Pumpkin (Cucurbita moschata Duch.) and Winter Squash (Cucurbita maxima Duch.) Genotype Seeds

摘要

In this study, some physical properties of pumpkin line ('14 BO 01') (Cucurbita moschata Duch.) and winter squash variety seeds ('55 CA 15' and 'Arican 97') (Cucurbita maxima Duch.) were evaluated at five different moisture content levels. Length, width and thickness increased linearly, as the moisture content increased from 8.62 to 25.49% dry weight basis (dwb) for 'Arican 97', from 9.60 to 25.60% for '55 CA 15' and from 6.81 to 23.07% for '14 BO 01'. All the diameters of seeds were significantly related with the seed moisture contents (P < 0.05). The sphericity varied from 0.548 to 0.565 for 'Arican 97', from 0.548 to 0.565 for '55 CA 15' and from 0.482 to 0.504 for '14 BO 01' as the moisture content increased. With the increase in moisture content, the surface area varied from 290.08 to 330.86 mm~2 for 'Arican 97', from 349.22 to 382.12 mm~2 for '55 CA 15' and from 333.29 to 398.35 mm~2 for '14 BO 01'. The bulk and true densities decreased from 411.86 to 366.03 kgm~(-3), from 390.35 to 347.37 kgm'3 and from 375.54 to 316.55 kgm~(-3) for 'Arican 97', '55 CA 15' and '14 BO 01', whereas the seed moisture content increased, respectively. The angle of repose increased from 17.11° to 22.87° for 'Arican 97' as the moisture content increased. These values increased from 15.25° to 23.87° for '55 CA 15' and from 16.42° to 24.17° for '14 BO 01' with the increase in moisture content. Porosity values ranged between 41.30-43.20%, 45.08-47.36% and 45.47-50.49% with the increasing moisture contents for'Arican 97', '55 CA 15' and '14 BO 01', respectively.