Seedling Emergence and Establishment of Germinated Seeds in Soybean

[摘要] The present experiments were conducted with an aim to obtain higher percentages of seedling emergence and establishment by sowing the germinated seeds than by direct sowing in the field. By this new method it is possible to lessen the labor needed for transplanting. A series of experiments with soybean (Glycine max cultivar. Enrei) were carried out on the field nursery beds. The results obtained are summarized as follows : (1)When seeds were put on so as to direct the hilum to the valley parts of the filter paper folded up in V-shape, seed germination became considerably promoted. The highest germinability was obtained when water depth was maintained at about one-fourth of the seed height (seed width in practice) (Fig. 1). (2)Assuming the percentage of seedling establishment being 100% by transplanting the seedlings raised in paper pots, those of germinated seeds and of direct sowing were 92% and 73%, respectively (Fig. 3). (3)The percentages of seedling establishment by sowing germinated seeds dried out on the filter paper in the laboratory did not decrease conspicuously within about one week, but thereafter it decreased so rapidly. Those of the germinated seeds stored under refrigeration were higher than those of air-dried ones in the laboratory within the same period (Fig. 5). (4)The percentages of seedling establishment by sowing the germinated seeds submerged in water during 1, 2 and 3 days were 83%, 44% and 10%, respectively (Fig. 6). (5)More uniform seedlings can be obtained when shallow planted at the depth of 1-3 cm than 5-6 cm under field conditions (Fig. 7).

[学科分类] 农业科学（综合）