Residual Activity and Effect of Soil-applied Herbicides on Succeeding Crops in Vegetable Fields;4. Residual Amount of Herbicides Nitralin and Napropamide

주요채소용제초제(主要菜蔬用除草劑)의 토양중(土壤中) 잔효와 후작물(後作物)에 미치는 영향(影響);제(第)4보(報) : 제초제(除草劑) Nitralin과 Napropamide의 잔류량조사(殘留量調査)

  • Ryang, H.S. (College of Agriculture, Chonbuk National University) ;
  • Moon, Y.H. (College of Agriculture, Chonbuk National University) ;
  • Choi, E.S. (College of Agriculture, Chonbuk National University) ;
  • Jang, M.S. (College of Agriculture, Chonbuk National University) ;
  • Lee, J.H. (College of Agriculture, Chonbuk National University) ;
  • Chang, Y.N. (College of Agriculture, Chonbuk National University)
  • Published : 1991.10.11

Abstract

The soil residual amount of herbicides nitralin and napropamide was determined in 6 winter crops field using a chemical assay method. Chemical analysis on soil residue revealed that a relatively high amount of nitralin was detected between 150 and 200 days after treament(DAT). However, regardless of soil types the residue at 220 DAT ranged from 0.053 to 0.141ppm and from 0.134 to 0.308ppm, at the rate of 75 and 150 g a.i./10a, respectively. The residue of napropamide applied at the rate of 75 g a.i./l0a ranged from 0.006 to 0.072ppm at 150 DAT, but not detectable at 220 DAT. When application rate increased to 150 g a.i./10a, napropamide residue was between 0.005 and 0.16ppm at 150 DAT and less than 0.004ppm at 200 DAT, and was not detected at 220 DAT, irrespective of soil types. The results of chemical analysis for the two herbicides showed a similar trend to those obtained from the experiments in agar medium and fields.

월동작물(越冬作物)에 처리(處理)한 두 제초제(除草劑)의 토양중잔류량(土壤中殘留量)을 화학분석(化學分析)에 의하여 경시적(經時的)으로 조사(調査)한 결과(結果)는 다음과 같다. 1. nitralin은 150일 경과후에서 200일 경과후까지는 비교적 고약량(高藥量)이 검출(檢出)되었고, 220일 경과후 토양(土壤)에서도 토성(土性)에 관계없이 75g a.i./l0a 처리구(處理區)에서 $0.053{\sim}0.141ppm$ 범위(範圍)로, 150g처리구(處理區)에서는 $0.134{\sim}0.308ppm$로 검출(檢出)되었다. 2. napropamide의 75g처리구(處理區)중 150일 경과후 토양(土壤)에서는 $0.006{\sim}0.072ppm$이 검출(檢出)되었고, 200일 경과후 토양(土壤)에서는 검출한계이하(檢出限界以下)(ND)였다. 또 150g처리구(處理區)중 150일 경과후 토양(土壤)에서는 N. D-0.04ppm이 검출(檢出)되었으며 220일 경과후 토양(土壤)에서는 토성(土性)에 관계없이 검출한계이하(檢出限界以下)로 나타났다. 3. 두 제초제(除草劑) 모두 화학적(化學的)일 잔류량조사결과(殘留量調査結果)는 한천배지실험(寒天培地實驗) 및 포장(圃場)에서의 생물검정실험(生物檢定實驗)의 결과(結果)와 합치(合致)된 결과(結果)임이 확인(確認)되었다.

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