The effect of increased application of silica, nitrogen and potassium on rice grown on Akiochi soils

추락답(秋落沓)의 수도(水稻)에 대(對)한 규산(珪酸), 질소(窒素) 및 가리(加里)의 증시효과(增施效果)

  • Published : 1971.10.15

Abstract

1. Increment of applied $SiO_2$, N and K effected Significantly the rice yield in Akiochi soil. Nitrogen fertilizer, however, should be split in several times. 2. The applied silica accelerated the nitrogen efficiency in particular when the increased nitrogen fertilizer was applied. 3. The number of hill per plant was increased by increasing nitrogen application, while percent of maturity was decreased. But application of increased Potassium gave remarkerbly high percentage of maturity. 4. Application of silica to the Akiochi soil increased both the number of spikelets and percentage of maturity of rice. 5. The increased application of nitrogen raised nitrogen content in plant but decreased the content of silica and potassium. The ratio of $SiO_2/N$ and $K_2O/N$, therefore, decreased. 6. From the results it can be concluded that application of increased nitrogen to the Akiochi soil should be accompanied by application of increased $SiO_2$ and K.

1. 추락답(秋落畓)에 대(對)한 규산(珪酸), 질소(窒素) 및 가리(加里)의 증시효과는 현저하나 질소(窒素)는 수회(數回)로 나누어 분시(分施)하여야 한다. 2. 규산(珪酸)은 질소증시(窒素增施)의 효율을 높인다. 3. 질소(窒素)를 증시(增施)하면 주당수수(株當穗數)는 증가(增加)하나 등숙률(登熟率)이 현저히 감소(減少)된다. 질소증시(窒素增施)로 인(因)하여 감소된 등숙률(登熟率)은 가리증시(加里增施)로 높일 수 있다. 4. 규산시용(珪酸施用)은 추락도(秋落稻)의 등숙률(登熟率)과 수당립수(穗當粒數)를 증가(增加)시켰다. 5. 질소증시(窒素增施)는 식물체(植物體)의 질소함량(窒素含量)을 증가(增加)시키나 규산(珪酸) 및 가리(加里)의 함량(含量)은 감소(減少)되여 규산(珪酸)/질소(窒素) 및 가리(加里)/질소비(窒素比)가 낮아진다. 6. 추락답(秋落畓)에 질소(窒素)를 증시(增施)할 때에는 규산(珪酸) 및 가리(加里)도 함께 증시(增施)하여야 한다.

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