Abstract
Metabolism of carbohydrates and crude protein in rice plants grown on the Non-Si Plot were compared with those in the plants of the Si plot. Contents of reducing sugar (Fig. 2), non-reducing sugar (Fig. 4), starch (Table 1), and crude protein (Fig. 6) in the plants of the Si plot were in general higher than in those of the Non-Si plot through the whole growth stage. Production of reducing and non-reducing sugars and crude protein, and translocation of those to the panicle were large and smooth in the plants of the Si plot, but in the Non-Si plot, they were small and not smooth. From the results obtained, it was recognized that SiO2 would be concerned in production and translocation of carbohydrates and protein in rice plants directly or indirectly.
