Evaluation of Companion Crop for Conservation of Soil in Highland Cultivativation of Chinese Cabbage

고랭지배추 재배지 토양보전을 위한 동반작물 도입 평가

  • 김기덕 (농촌진흥청 고령지농업연구소) ;
  • 안재훈 (농촌진흥청 고령지농업연구소) ;
  • 이정태 (농촌진흥청 고령지농업연구소) ;
  • 홍순춘 (농촌진흥청 고령지농업연구소) ;
  • 황선웅 (농촌진흥청 농업과학기술원) ;
  • 김충국 (농촌진흥청 작물과학원)
  • Published : 2008.03.31

Abstract

Four cover plants such as Phlox subulata, Glechoma hederacea var. longituba, Sedum middendorffianum and Saxifraga laciniata were evaluated to investigate the effect of companion planting on reducing soil erosion in Chinese cabbage cultivated highland. The experiment was conducted using lysimeters of $5\;m{\times}2\;m$ (length$\times$width) with 5, 15 and 30% slopes. Companion plants except Sedum middendorffianum did not interface with growth of Chinese cabbage Glechoma hederacea var. longituba and Sedum middendorffianum grew faster than Phlox subulata and Saxifraga laciniata in the early growth stage suer transplanting, resulting in fast ground covering, but the ground covering by Phlox subulata and Saxifraga laciniata was delayed because growth suppression by high air temperature during summer season. Soil erosion became severe as increasing degree of slope. Assessments of the four cover plants were conducted in relation to soil conservation characteristic of scenery, endurance to the environment stress, plant growth and weed suppression. From the assessments, Phlox subulata was superior to other intercropping crops tested for reducing soil erosion in highland cultivation of Chinese cabbage.

고랭지 경사밭의 토양보전을 위해서 고랭지 배추재배지에 애기기린초, 범의귀, 지면패랭이, 긴병꽃풀 등 4종의 지피성 동반작물의 도입가능성을 경사도 5, 15 및 30%의 라이시미터에서 평가하였다. 애기기린초를 제외한 지피성 동반작물은 배추의 생육에 영향을 미치지 않았다. 배추와 동반작물에 의한 정식 이후의 피복률 변화는 동반작물보다는 배추생장에 의해 주도되었으며, 초기의 생장속도가 빨랐던 긴병꽃풀과 애기기린초 동반작물 재배구에서 초기 피복률 상승이 빠른 반면, 고온기 생장속도가 느린 범의귀와 지면패랭이는 급속한 피복도 증가를 보이지 않았다. 각각의 동반작물의 줄기와 잎의 절단 경도는 범의귀와 애기기린초가 낮은 반면, 긴병꽃풀과 지면패랭이는 매우 높아 내답압성이 우수하였다. 지피성 동반작물과 배추는 광 및 양분 경합성은 거의 없었다. 지피성 동반작물 재배구에서 배추 수관 아래 기온 및 지온은 배추 단독구보다 각각 $1^{\circ}C$내외, $0.5{\sim}1^{\circ}C$ 낮았으며, 습도는 8% 정도 높았다. 4종 지피성 동반작물을 토양보전성, 경관성, 내성, 생육 등을 고려하여 각 평가요소별 가중치를 두어 평가한 결과, 지면패랭이>긴병꽃풀>>범의귀>애기기린초의 순으로 높았고, 이중 지면패랭이가 가장 우수하였다.

Keywords

References

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