LIFESTYLES OF SEEDS OF OILSEED RADISH AND ITS BIOLOGICAL COMPOSITION BY LABORATORY EVALUATION METHODS

The results of complex estimation of biological components of viability of oilseed seeds varieties of radish are highlighted in the article. The stage of germination of seeds from the beginning of moisture absorption by seed until the formation of complete stairs from the standpoint of the features of soil nutrition and water absorption is described in detail. The data concerning the formation of the index of laboratory similarity of seeds with regard to the germination temperature in the range from 0 to 45 ºС in the simulated conditions of the soil substrate is analyzed. The optimum conditions of the temperature regime of germination of seeds of oilseed radish varieties are determined on the basis of which the optimal timing of sowing is specified in both spring and summer periods. An estimation of the formation of indices of laboratory germination of oilseed radish depending on its fractional composition in the range of mass of 1000 seeds of 7-10 g, 10-13 and 13-16 g was done. This allowed to develop recommendations on optimal conditions for the sowing of seeds of different fractions and to clarify its biological peculiarities given the weight differences. The biological longevity of seed of oilseed radish is estimated due to the duration of its economic storage. The peculiarities of formation of the indicator of biological longevity of seeds according to the index of laboratory similarity of seeds are described, depending on the conditions of formation of seeds in the year of its harvesting. The conclusions on the management of reproductive seedlings of oilseed radish on the basis of certain and investigated factors are summarized.