Studies on the Effects of Ozone Gas in Paddy Rice;4. Effects of Ozone Gas on Rice Growth at Different Nutrition Levels

수도생육(水稻生育)에 대(對)한 Ozone가스의 영향(影響)에 관(關)한 연구(硏究);4. 수도 (水稻)의 영양상태(營養狀態)와 Ozone가스 피해(被害)

This study was carried out to investigate the effect of ozone gas on paddy rice at the different nutrition levels. Jinjubyeo variety of rice plant was exposed to 0.3 ppm ozone gas for 3 hours. It was cultivated at three different application levels, optimum, -50%, and +50% of optimum of nitrogen, phosphorus, and potassium, respectively. After ozone gas fumigation, percentage of damaged leaf, malondialdehyde contents, activity of peroxidase, and nutrient contents of rice plant were observed. The results obtained are as follows. 1) Percentage of damaged leaf was increased at the both additional 50% application of nitrogen and 50% reduction of potassium. 2) Malondialdehyde contents of leaves were increased with the ozone gas exposure. 3) Percentage of damaged leaf was increased at the lower level of $K_2O/N$ ratio in leaves. 4) Nitrogen, phosphorus, and potassium contents in rice leaves were decreased with the ozone gas exposure. 5) The peroxidase bands on gel in electrophoresis were changed by the ozone gas exposure.

수도(水稻)의 영양상태(營養狀態)와 Ozone가스 피해(被害)와의 관계(關係)를 구명(究明)하기 위(爲)하여 진주(眞珠)벼를 공시(供試)하여 질소(窒素), 린산(燐酸), 가리(加里), 표준비(標準肥)에 각각(各各) 50%증비(增肥) 및 50%감비(減肥)하여 Ozone가스 0.3ppm을 3시간접촉후(時間接觸後)에 엽피해율(葉被害率), malondialdehyde, peroxidase의 전기영동(電氣泳動) 및 무기성분함량변화(無機成分含量變化)을 조사(調査)한 결과(結果)는 다음과 같다. 1. 질소증시(窒素增施) 및 가리감비(加里減肥)로 Ozone가스의 피해(被害)가 증가(增加)된다. 2. Ozone가스 피해율(被害率)에서 malondialdehyde의 함량(含量)이 증가(增加)된다. 3. $K_2O/N$비(比)가 낮을수록 엽피해(葉被害)가 증가(增加)한다. 4. Ozone가스 피해(被害)로 엽중(葉中) 질소(窒素), 린산(燐酸), 가리함량(加里含量)이 감소(減少)하는 경향(傾向)이다. 5. Peroxidase를 전기영동(電氣泳動)한 결과(結果) 시비량(施肥量)에 따른 band의 차이(差異)는 발견(發見)하지 못하였으나 Ozone가스 접촉(接觸)으로 2, 3, 4번째 band에서 변화(變化)가 있었다.