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珪酸 窒素施用量이 稻體無機成分과 收量構成要素에 미치는 影響
卞漢圭,高美錫 慶尙大學校 1985 論文集 Vol.24 No.1
A series of field experiment were conducted to evaluate the effects of silicate fertilizer, mineral contents and nitrogen fertilizer on the yield, its components, and changes of chemical properties of rice plant. The results obtained are summarized as follows: 1. The applications of silicate fertilizer produced number of grains per hill, ripened ratio of grains and 1000-grain weight in the plots silicate applied were higher and heavier than those of the control plot (not silicate applied) in two types of varieties (Japonica and Japonica x Indica). The brown rice yield was increased by 9.3% in the Japonica x Indica variety and 8.2% in the Japonica variety in plots silicate applied compared with those of the control plot. 2. The rice plant in the plot silicate applied contained more T-N and P_2O_5 at the maximum tillering stages, K_2O, CaO and MgO at the heading time, and SiO_2 at the three stages(maximum tillering stages, heading time and harvesting time) than those in the control plot. 3. In the plot silicate applied, positive correlation were recognized between the yield and mineral nutritions, but those in the control were not. 4. When applied more nitrogen fertilizer, the rice plant showed the more SiO_2 contents. 5. The maximum yield showed N12kg/10a in the control and N18kg/10a in the plot silicate applied. 6. The SiO_2 ratio was increased in the plot silicate applied, and decreased outbreak of leaf blast and sheath blight. 7. The optimum levels of nitrogen fertilizer were 14kg/10a in the control, 20kg/10a in the plot silicate applied.
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