Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Relations between Soil Physicochemical Properties and Ginger Growth

토양의 물리.화학적 성질과 생강 생육과의 관계

  • 김동진 (전북대학교 대학원 농화학과) ;
  • 안병구 (전라북도농업기술원 기후변화대응과) ;
  • 이진호 (전북대학교 생물환경화학과)
  • Received : 2013.06.07
  • Accepted : 2013.06.25
  • Published : 2013.06.30
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Abstract

Root-rot disease is a serious problem in ginger cultivation fields and it reduces the quality and productivity of ginger. This study was conducted to investigate the effects of different soil physical and chemical properties on the changes of ginger growth. As comparing the selected soil chemical properties after harvesting the ginger plants with those before planting them, the contents of total nitrogen and exchangeable $Mg^{2+}$ increased, whereas electrical conductivity (EC) and exchangeable $K^+$ content decreased. Potassium (K) concentrations in ginger plant were markedly higher in both its shoot and root parts ranging from 63.9 to $72.3g\;kg^{-1}$ and from 27.6 to $37.3g\;kg^{-1}$, respectively, which might be related to the decrease of exchangeable $K^+$ content in soils. Incidence rate of ginger root-rot disease in the plots ranges between 26.7% and 88.1%. It was higher in low elevation plots with clay loam soils than in high elevation plots. In addition, the incidence of the disease increased as affected by high temperature and humid condition during the growth and maturity stages of ginger. Therefore, soil texture, field slop, and drainage system as well as chemical properties should be considered to cultivate ginger plant.

생강 재배지 토양의 물리 화학적 특성 변화, 생강의 양분 흡수 관계, 생강의 생육 변화를 조사하였다. 시험 전 토양과 생강 수확 후 토양 특성을 비교하면, 시험 전 토양의 전질소 함량은 $0.04{\sim}0.13g\;kg^{-1}$, 치환성 K는 $1.88{\sim}2.80cmol_c\;kg^{-1}$, 치환성 Mg는 $0.41{\sim}0.55cmol_c\;kg^{-1}$, 수확 후 토양의 전질소 함량은 $0.31{\sim}0.95g\;kg^{-1}$, 치환성 K는 $0.47{\sim}1.37cmol_c\;kg^{-1}$, 치환성 Mg는 $1.07{\sim}1.97cmol_c\;kg^{-1}$로서 전질소 함량과 치환성 Mg의 함량은 증가하였고, 치환성 K의 함량은 감소하였다. 식물 양분 중 K, Ca, Zn, Cu의 흡수량이 지상부에서, 망간의 흡수량은 지하부에서 높은 함량을 보였으며, K의 흡수량은 지상부에서 $63.9{\sim}72.3g\;kg^{-1}$, 지하부에서 $27.6{\sim}37.3g\;kg^{-1}$로서 특히 높은 함량을 보였다. 생강 중 K의 높은 흡수량으로 인하여 토양 중 치환성 K의 함량이 수확 후 감소한 것으로 보인다. 생강의 뿌리썩음병은 저지대 및 식양토에서 높은 병발생률을 보였는데, 저지대로의 수분이동과 저지대의 배수 취약성이 병발생을 증가시키고, 토양수분 보유력이 높은 식양토 또한 병발생 증가에 영향을 준 것으로 생각된다. 뿌리썩음병 발생률은 낮게는 26.7%에서, 높게는 88.1%로 나타났는데, 생강 성숙기인 8월과 9월의 고온다습한 기후 조건도 높은 뿌리썩음병 발생의 원인으로 보인다. 생강 뿌리썩음병은 토양의 토성 및 지형 조건에 따른 토양수분의 증가, 고온다습한 기후 조건 등에 따라 발생률이 증가되는 것으로 판단된다. 따라서, 생강 재배지 선정시 지대의 경사, 토성, 배수 system 등이 고려되어야 할 것이다.

Keywords

References

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