Thermophysical properties of camelina (Camelina sativa (L.) Crantz) seeds fertilized with nitrogen

摘要

The aim of this study was to evaluate the effect of nitrogen fertilization (0, 40, 80, 120, 160 kg N ha(-1)) on changes in selected physical, thermal, and geometric parameters of camelina seeds. Samples 0 kg N ha(-1) and 40 kg N ha(-1) formed a homogenous group with lower values of 1,000 seed weight and differed significantly from the second homogeneous group of samples 80, 120, and 160 kg N ha(-1) with higher 1,000 seed weight. Nitrogen fertilization did not exert a significant effect on bulk density, true density, or porosity. Fertilization had no significant effect on the thermal properties of camelina seeds. Based on all linear dimensions and shape factors, samples 0 and 40 kg N ha(-1) formed one homogenous group and were significantly different from the remaining samples. Samples 0 and 40 kg N ha(-1) were characterized by the lowest values of linear dimensions, including length, width, surface area, profile specific perimeter, and convex perimeter, the lowest values of selected shape factors, including diameter range, standard deviation of all radii, Blair-Bliss coefficient, and Danielsson coefficient, as well as the highest values of the radius ratio and roundness. Practical Applications Nitrogen fertilization strongly influences the properties of camelina seeds. Camelina seeds subjected to 120 kg N ha(-1) were characterized by the highest dimensions, such as: length, width, surface area, and high values of 1,000 seed weight and they may be most desirable to be used in practice.