Growth and crop residue of soybean and barley grown at high paraquat level of the orchard soil

고농도 paraquat 잔류 과원토양에서의 콩과 보리 생육 및 작물 잔류

  • Chun, Jae-Chul (Division of Applied Biotechnology, Chonbuk National University) ;
  • Park, Nam-Il (Division of Applied Biotechnology, Chonbuk National University) ;
  • Kim, Sung-Eun (Division of Applied Biotechnology, Chonbuk National University) ;
  • Chun, Jae-Kwan (Division of Applied Biotechnology, Chonbuk National University)
  • 전재철 (전북대학교 응용생물공학부) ;
  • 박남일 (전북대학교 응용생물공학부) ;
  • 김성은 (전북대학교 응용생물공학부) ;
  • 전재관 (전북대학교 응용생물공학부)
  • Published : 1998.12.30

Abstract

Effect of soil residue paraquat (1,1-dimethyl-4,4-dipyridinium dichloride) on growth of barley (Hordeum vulgare L. cv. Sacheon No.6 and cv. Tapgolbori) and soybean [Glycine max (L.) Merr. cv. Alcheon and Danyeop] was investigated. Changes in soil residue paraquat during the cultivation period and residue amount in the p1ants at harvest were also determined. Experiments were conducted at two paraquat residue conditions; the first was done in an apple orchard soil where paraquat residue recorded 30.2 ppm in 1996, but decreased to about 9 to 9.8 ppm at the time of crop seeding and the second was conducted in the soil fortified to about 27 to 32 ppm paraquat residue. In both conditions, no crop injury due to the residue paraquat was observed and number of emerged seedlings and plant height of the two crops were not affected by soil residue paraquat. Residue amount of paraquat in the plants occurred less than 0.5 ppm detection limit. At the first condition, soil residue paraquat was further slightly decreased for 90 days after seeding, while no great change in the residue level was found at the second condition for 30 days after seeding. The results suggest that no carry-over effect occurs at about 30 ppm of soil residue paraquat and at present crop cultivation in Korean orchard soils are safe with respect to crop growth and paraquat residue in the plants.