토양중 제초제 Bentazon 잔류물의 콩과 무우에 의한 흡수 = Originals : Uptake of the Residues of the Herbicide Bentazon in Soil by Soybean and Radish

다국어 초록 (Multilingual Abstract)

In order to clarify how much of the residues of Bentazon could be taken up by crops, soybean and radish were grown for 28 days in soils containing freshly treated ^(14)C-Bentazon and non-extractable soil-hound residues of ^(14)C-Bentazon. The results obtained are summarized as follows. 1. ^(14)CO₂ evolution from ^(14)C-Bentazon during the 6-month pre-incubation in soil was 14.79% relative to the applied radioactivity. 2. Mineralization of ^(14)C-Bentazon in soil to ^(14)CO₂ during 28 days of crop growing was much higher in the freshly treated soil than in the bound soil, and much higher in radish than in soybean. 3. The amounts of ^(14)C-Bentazon and its metabolites absorbed by soybean and radish were 45.41 and 21.48%, respectively, in freshly treated soil, whereas those were 3.92 and 1.23% in bound soil, respectively. The translocation ratios of radioactivity .from the root to the shoot were much higher in radish than in soybean, remarkably. 4. The uptake ratios of the freshly treated ^(14)C-Bentazon to the bound ^(14)C-Bentazon by soybean and radish were 12 : 1 and 17 : 1, respectively. 5. It was well verified that the presence of crops enhanced the mineralization to ^(14)CO₂ and the transformation to polar metabolites of Bentazon.