Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Impacts of Flooding Depths on Weed Occurrence and Yield in No-tillage Paddy Field Covered with Chinese Milk Vetch

무경운 자운영 피복 논에서 담수 깊이가 잡초발생과 수량에 미치는 영향

  • Hong, Kwang-Pyo (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Lee, Young-Han (Gyeongsangnam-do Agricultural Research and Extension Services)
  • Received : 2011.03.17
  • Accepted : 2011.04.13
  • Published : 2011.04.30
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Abstract

Rice production depended on the weed control. The purpose of this study was conducted to evaluate the influence of tillage with chemical amendments + 5 cm flooded, no-tillage without Chinese milk vetch + 5 cm flooded (NTNT 5 cm), no-tillage amended with Chinese milk vetch + 5 cm flooded (NTCM 5 cm), and no-tillage amended with Chinese milk vetch + 10 cm flooded (NTCM 10 cm) on weed occurrence and yield of rice in paddy. Triplicate experimental plots were laid out in a randomized complete block design and compared by employing least significant difference. The dry weights of weeds in NTCM 5 cm and NTCM 10 cm were 11% and 4% level of NTNT 5 cm (p<0.05) and were 3.2 times and 1.2 times more than in conventional tillage system. In addition, the Aneilema keisak and Ludwigia prostrata were significantly increased in NTNT 5 cm (p<0.05). The yield of rice grain in NTCM 10 cm was 2.6 times more than in NTNT 5 cm and was 89% level of conventional tillage system. Our findings suggest that NTCM 10 cm should be enhance of weed control as well as improving of yield of rice in paddy.

유기농업을 위한 무경운 논에서 자운영 피복을 통한 담수깊이가 잡초발생과 벼 수량에 미치는 영향을 구명하여 농가현장에 적용할 수 있는 기술을 연구하였다. 무경운 논에서 자운영 피복과 담수깊이를 10 cm로 40일간 유지한 결과 잡초발생량은 $4.8g\;m^{-2}$으로 제초제를 처리한 경운 처리구 $4.1g\;m^{-2}$와 비슷한 수준이었으며 벼 수량은 $3.92Mg\;ha^{-1}$로 경운 처리구 보다 11% 감소되었다. 무경운 논에서 발생되는 주요 잡초는 사마귀풀, 여뀌바늘, 물달개비 순이었으며 자운영을 피복하지 않을 경우 잡초발생량이 $115.4g\;m^{-2}$으로 벼 생육이 어려워 수량이 경운 처리구 $4.42Mg\;ha^{-1}$보다 66% 감소되었다. 따라서 벼 유기농업을 위해 무경운에 자운영을 피복하고 담수깊이를 10 cm로 40일간 유지하는 것이 가장 효율적인 것으로 나타났다.

Keywords

References

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