답토양(畓土壤)에서의 시비규산(施肥珪酸)과 인산(燐酸)의 상호작용(相互作用)에 관(關)한 연구(硏究) = Interaction between Silicate and Phosphate Fertilizers Applied in the Paddy Soils

다국어 초록 (Multilingual Abstract)

To investigate interactions of silicate and phosphate applied in paddy soil, different levels of the two fertilizers were treated on pots of Jinheung variety of Japonica rice, then availability and absorption of the silicate and phosphate and growth of the rice plant were analyzed. The availability of silicate applied in soil was reduced by increased application of phosphate and this antagonism implied the interaction of silicate and phosphate in soil. The silicate absorption by rice plants was remarkably reduced by the phosphate application, while the phosphate absorption was reduce only at high levels of silicate. At low levels of silicate, the phosphate absorption was affected differently depending on growth stage or parts of the rice plant. The application of silicate fertilizers increased the pH of the soils. The application of silicate and phosphate fertilizers improved the plant height, the tiller number, and the grain weight, but not the dry weight of the grain. The effect of interaction of silicate and phosphate on the plant growth did not appeared.