水稻의 亞黃酸가스 煙害에 관한 硏究 (Ⅰ) : 被害水稻의 營養學的實態와 品種抵抗性 Survey of nutritional status of suffered rice plant and varietal resistance = Study on sulfur dioxide gas injury to rice plant (Ⅰ)

다국어 초록 (Multilingual Abstract)

Absorption of sulfur dioxide by rice plant of 10 varieties and its relation to the varietal resistance and nutrient contents of leaves in accordance with the increased sulfur contents were studied on rice plants in Ulsan district suffered from smoke injury as compared with those in Jinju district being not suffered.
1. The typical symptoms of SO₂ gas injury showing the smoky spots were presented on suffered leaves of rice plant in Ulsan district, however no symptoms were appeared in Jinju.
2. Soluble sulfur contents of leaves in affected rice plant in Ulsan were generally high, presenting the amount of 0.176%.
3. Average nitrogen content of suffered leaves in Ulsan was 1.68%, and showed statistically high correlation with soluble sulfur content. The correlation coefficient(r) was +0.557.
4. Negative correlation were revealed between S and Ca, K and P contents of leaves, having the coefficient of -0.354, -0.378, -0.27 respectively, and no significant correlation was found.
5. Mn, Mg and SiO₂ contents of leaves were showed no connection with S content of leaves.
6. The ratio of SiO₂/N and K₂O/N of leaves were highly correlated with S content having the coefficient of -0.535, -0.512 respectively. The ratio of K₂O/SiO₂ and CaO/MgO were not significantly correlated with S content.
7. Of the rice yield components, weight of unpolished rice per 10a, weight of unhulled rice 「per 10a, mating ratio, number of grain per panicle, 「panicle length and clum length of affected rice plant in Ulsan district were remarkedly reduced as compared with healthy rice plant in Jinju.
8. Weight of unpolished rice, number of grain per panicle and number of panicle, of the yield components for suffered rice plant in Ulsan district were revealed high amount in "Nopoong" variety and in "Milyang 23", the next.