규산시용량(珪酸施用量)이 수도(水稻)의 지방산(脂肪酸) 및 Sterol 조성(組成)에 미치는 영향(影響)

Effect of Silicates on the Fatty Acid and Sterol Composition of Paddy Rice

1. 식물체(植物體) 중(中) 전생육기간(全生育期間)동안 검출(檢出)된 지방산(脂肪酸)의 종류(種類)는 $C_{12:0}$, $C_{14:0}$, $C_{16:0}$, $C_{16:1}$, $C_{16:2}$, $C_{18:0}$, $C_{18:1}$, $C_{18:2}$, $C_{18:3}$, $C_{20:2}$와 몇종(種)의 미동정(未同定)된 지방산(脂肪酸)으로 구성(構成)되어 있었다. 2. 규산흡수양(珪酸吸收量), 건물중(乾物重) 및 수량(收量)은 unsaturated fatty acid/saturated fatty acid와 최고분얼기(最高分蘖期) 및 출수기(出穗期)에는 유의적(有意的)인 정(正)(+)의 상관(相關)이 있었으며 수확기(收穫期)에는 유의적(有意的)인 상관(相關)은 없었으나 전반적(全般的)으로 역(逆)(-)의 관계(關係)가 있었다. 3. 식물체중(植物體中) UFA/SFA 비(比)의 평균치(平均値)는 최고분얼기(最高分蘖期) 및 출수기(出穗期)에서는 토양중(土壤中) 규산함량(珪酸含量)이 180ppm까지는 규산함량(珪酸含量)이 높을수록 증가(增加)하였고, 규산자원(珪酸資源) 200kg/10a 시비구(施肥區)(약(約) 410ppm)에서는 감소(減少)하였다. 4. 최고분얼기(最高分蘖期)의 sitosterol/stigmasterol 비(比)는 토양중(土壤中) 규산농도(珪酸濃度)가 높을수록 계속 증가(增加하였으나, 출수기(出穗期)에 있어서는 그 비(比)가 토양중(土壤中) 규산농도(珪酸濃度)를 180ppm 조절시(調節時)까지는 증가(增加)하다가 200kg/10a 시용(施用)(410ppm)에서는 감소(減少)하였다.

A pot experiment was conducted to find out the effect of application amounts of silicates on the fatty acid and sterol composition of paddy rice at various growing stages. The results obtained were as follows; 1. At maximum tillering stage and heading stage, significant positive correlations were obtained between the ratio of unsaturated fatty acid to saturated fatty acid and silica absorption, dry matter or grain yield, respectively. But significant correlation was not observed between them at harvesting time. 2. At maximum tillering stage and heading stage, the ratio of unsaturated fatty acid to saturated fatty acid in paddy rice was increased with increasing silica application from 80 to 180 ppm of soil, but these ratio was decreased at the plot of 200Kg/10a of silicate. 3. The ratio of sitosterol to stigmasterol in paddy rice at maximum tillering stage was increased with increasing silica application of soil, but these ratio was increased with increasing silica application up to 180 ppm of soil at heading stage, and was decreased at the plot of 200Kg/10a (410 ppm in soil) application of silicates.