Korean Journal of Weed Science (한국잡초학회지)

The Korean Society of Weed Science & The Turfgrass Society of Korea Archive (한국잡초학회 & 한국잔디학회)
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Effect of Several Herbicides on Weed Control and Seedling Growth in Rice Nursery

수도(水稻)못자리에 있어서 몇가지 제초제처리(除草劑處理)가 잡초방제(雜草防除) 및 묘생육(苗生育)에 미치는 영향(影響)

  • Ree, D.W. (Kyounggi Provincial Office of Rural Development) ;
  • Hong, Y.K. (Kyounggi Provincial Office of Rural Development) ;
  • Kim, J.C. (Kyounggi Provincial Office of Rural Development) ;
  • Kim, H.D. (Kyounggi Provincial Office of Rural Development)
  • Published : 1984.12.30
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Abstract

This experiment was carried out to clarify the effect of herbicide chlormethoxynil 7G, CNP 9G and butachlor 3.5/pyrazolate 6G on weed control and seedling growth in rice seedbed. Different quantities of the herbicides were applied as soil incorporation or surface broadcasting. At earlier sowing annual grasses such as Echinochlva spp. and Alopecurus spp. were dominated, but Cyperus spp. were dominated at later sowing. Weed suppression by herbicides was greater in soil incorporation than in broadcasting and chlormethoxynil 7G and CNP 9G application (30kg/ha) showed about 70% weed control, while butachlor 3.5/pyrazolate 6G (10-20kg/ha) showed 90 to 100% weed control. At lower rate of butachlor 3.5/pyrazolate 6G (10kg/ha) emergence ratio, healthy seedling ratio and relative growth rate of rice were higher, and phytotoxicity was lower than in the others.

제초제(除草劑) 처리(處理)에 의한 못자리 잡초방제(雜草防除)와 묘생육(苗生育)에 미치는 영향(影響)을 검토(檢討)하기 위하여 경기도(京畿道) 농촌진흥원(農村振興院) 시험포장(試驗圃場)에서 못자리 제초제(除草劑)인 Chlormethoxynil, CNP 및 Butazol을 시용량(施用量)을 달리하여 복토(覆土) 무복토(無覆土) 처리(處理)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 파종시기(播種時期)에 따른 잡초발생량(雜草發生量)은 파종기(播種期)가 빠를수록 둑새풀, 피 등 화본과(禾本科) 1년생(年生) 잡초(雜草)가 우점(優占)되었으나 파종기(播種期)가 늦어질수록 방동산과(科) 잡초발생량(雜草發生量)이 많았다. 2. 잡초방제가(雜草防除價)는 복토구(覆土區)가 무복토구(無覆土區)에 비하여 높은 경향(傾向)이었으며 복토구(覆土區)에서 Chlormethoxynil, CNP 각각 3kg/10a 시용시 각각 76.71%, Butazol 1kg/10a 시용시는 97%이었다. 무복토구(無覆土區)에서는 이보다 다소 낮은 76, 61, 92%였다. 4. 무복토(無覆土)할 때 파종후(播種後) 40일(日)의 묘건물중(苗乾物重)은 Chlormethoxynil, CNP 각가 4kg/10a, Butazol 2kg/10a 처리에서 낮은 경향(傾向)이었다. 5. Butazol 1kg/10a 처리시(處理時) 묘(苗)의 생장속도(生長速度) 및 상대생장율(相對生長率)이 높은 경향(傾向)이다.

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