Studies on Uptake by Crops of Lead and Reduction of It's Damage -I. Effects of the Lead Uptake and Yield of the Rice Plant Related to Concentration of Lead in Sandy Liquid Culture

농작물(農作物)에 대(對)한 납(pb)의 흡수(吸收) 및 피해경감(被害輕減)에 관(關)한 연구(硏究) -I. 사경용액중(砂耕溶液中) 납(pb)농도(濃度)가 수도체흡수(水稻體吸收) 및 수량(收量)에 미치는 영향(影響)

A study was carried out to investigate yield, yield components, and change of chemical components in rice plants grown under different concentration of lead compound in nutrient solution of sandy culture. The results obtained are as follows. 1. Increasing lead concentration in culture solutions, pb content in the plant was increased and crop yields were decreased. 2. The critical pb concentration at which yield was declined, was 13.6 ppm. 3. As adding higher concentration of lead in nutrient solutions, concentration of lead in rice plant was significantly increased on leaf blade, and brown rice in pb. 4. Yield loss was closely related to pb content in leaf blade.

환경오염물질(環境汚染物質)의 하나인 납(pb)을 배양액중(培養液中)에 농도(濃度)를 달리하고 수도(水稻)에 대(對)한 pot사경시험(砂耕試驗)을 실시(實施)하여 수량(收量), 생육상황(生育狀況) 및 식물체내(植物體內) 납 축적정도(蓄積程度)를 조사(調査)한 결과(結果)는 다음과 같다. 1. 사경액중(砂耕液中) 납 농도(濃度)가 증가(增加)함에 따라 감수(減收)되였다. 2. 유의성(有意性)있는 감수최저농도(減收最低濃度)는 13.6ppm이었다. 3. 납 농도증가(濃度增加)에 따라서 수도체중(水稻體中) 납 함량(含量)은 엽신(葉身) 현미(玄米)에서 유의성(有意性)있는 증가(增加)를 보였고 엽초에선 유의성(有意性)이 없었다. 4. 식물체(植物體) 부위별(部位別) 납 함량(含量)과 감수율(減收率)과의 관계(關係)는 엽신(葉身)에서는 유의성(有意性)있는 증가(增加)를 보였으나 엽초에서는 유의성(有意性)이 없었다.