Analytical studies on the stability of the factors affecting appearance of the grain and eating quality in rice, 1: Effect of the characters of seedling on vegetative growth, yield and appearance of the grain in rice cultivar, Koshihikari
2001
Inoue, K. (Fukui-ken. Agricultural Experiment Station (Japan)) | Yuasa, K.
The influence of the characters of rice seedling (mainly young seedling with 3.0 to 3.5 leaf stage) on the vegetative growth after transplanting, yield and appearance of grain was studied. The experiments were conducted in three years by changing the seeding density, the amount of applied, the amount of irrigation water used and the air temperature in which the seedlings were grown during periods. The seedlings, which contained much nitrogen in the shoot, showed high roofing ability and vigorous growth during the transplantation to the maximum tiller number stage. A high positive correlation was recognized between the amount of nitrogen content in the shoot at transplanting and top dry weight at the maximum tiller number stage. At the maximum tiller number stage, the same relationship was observed between shoot dry weight and the root number. The higher the root number, the higher the ratio of total root to surface root numbers. A negative correlation appeared between the tiller number and the number of roots per tiller. In plots containing: less irrigated seedlings, non-fertilized and double fertilized seedlings, the ratios of to total root to surface root numbers were slightly higher than other plots at heading stage. There was a few differences on yield and yield components among plots. The yield was slightly higher in the plots, which were transplanted with superior seedlings. Plots, which were transplanted within inferior seedlings, had less spikelets, yield and an inferior of grain. The drainage treatment during ripening period caused a high increase of milky white rice kernels in these inferior seeding plots.
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