Effect of Hairy Vetch (Vicia villosa Roth) Sod Culture on Reducing Soil Loss and Providing Nitrogen for Chinese Cabbage in Highland

고랭지 배추 재배지에서 헤어리베치 초생재배에 의한 토양유실 경감 및 질소비료 공급효과

  • Received : 2005.07.25
  • Accepted : 2005.09.12
  • Published : 2005.10.30

Abstract

The effect of hairy vetch sod culture on reduction of soil loss and providing of nitrogen was investigated for the fields of Chinese cabbage in Hoenggye-Ri, Pyeongchang-Gun Gangwon-Do (780 m above sea level) from 2002 to 2003. Hairy vetch was sowed at just before planting, 15, 30 and 40 days after planting and right after harvest of Chinese cabbage. Hairy vetch was sod-cultivated with Chinese cabbage. The amount of sowing was $40kg\;10a^{-1}$. In this experiment, proper sowing times that had no influence on the yield of Chinese cabbage were 30 and 40 days after planting while other sowing times led to decrease the yield. In case of the former, there was 74% reduction effect of soil loss compared with no-hairy vetch because of covering the fields with hairy vetch right after harvest. Moreover, when the hairy vetch was put into the soil before planting of Chinese cabbage in the next year, it showed 61-79% substitution effect of standard application rate ($320kg\;ha^{-1}$, chemical fertilizer) for nitrogen fertilizer. It is suggested that using hairy vetch as cover crop would be useful in conservation of soil loss and reduction input of agricultural materials.

본 연구는 콩과 녹비작물인 헤어리베치를 고랭지 배추 재배지에 도입하여 경사지에서 토양유실 경감효과 및 녹비 반전 투입에 따른 질소 공급 효과를 알아보기 위하여 2002년부터 2003년까지 강원도 평창군 횡계리 (해발 780 m)에서 포장시험을 수행하였다. 처리는 헤어리베치를 배추 정식직전 파종구, 정식 후 15, 30, 40일 및 배추 수확직후 파종구 등 5처리로 하였으며, 배추와 함께 초생재배를 하였고, 파종량은 ha 당 40 kg으로 하였다. 시험 결과 헤어리베치를 배추 정식 직전과 정식 후 15일 이전에 파종할 경우에는 배추 생육 및 수량에 부정적인 영향으로 도입하기가 어려울 것으로 판단되었다. 그러나 정식 후 30, 40일 이내에 파종하여 초생재배 할 경우에는 배추 수량에는 영향을 미치지 않으면서 수확직후 토양이 조기 피복되는 효과로 헤어리베치 무처리구 대비 70% 이상의 토양유실 경감효과가 있을 것으로 평가되었다. 또한 이듬해 녹비로 반전 투입할 경우 표준시비량 ($320kg\;ha^{-1}$)의 61-78%의 질소질 화학비료 대체가 가능한 것으로 평가되어 경사지 밭의 보전과 농자재 저투입 기술의 일환으로 매우 유용할 것으로 판단된다.

Keywords

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