Effect of Soil Physical Characteristics on Rhizome Rot Incidence of Platycodon grangiflorus

토양 물리적특성이 도라지 근경부패병에 미치는 영향

  • Lee, Young-Han (Kyungnam Provincial Institute of Agricultural Technology) ;
  • Choi, Yong-Jo (Kyungnam Provincial Institute of Agricultural Technology) ;
  • Park, Sang-Ryeol (Department of Agricultural Chemistry, Kyungsang University) ;
  • Kim, Min-Keun (Kyungnam Provincial Institute of Agricultural Technology) ;
  • Cho, Soo-Jeong (Department of Agricultural Chemistry, Kyungsang University) ;
  • Yun, Han-Dae (Department of Agricultural Chemistry, Kyungsang University)
  • Published : 2000.02.28

Abstract

This study was conducted to determine the effect of soil physical characteristics on rhizome rot incidence of platycodon. Sampling sites were Keochang 4, Kimhae 7, Haman 6, Chinju 6 and Koseong 3 fields in Kyongnam province and Hongcheon 6 fields in Kangwon province. The root disease incidence rate was correlated with soil depth Y=-0.747X+88.19($R^2=0.394^{***}$), soil hardness Y=4.36X+8.93($R^2=0.201^*$), bulk density Y=104.7X-80.99($R^2=0.295^{**}$), clay content Y=1.24X+14.14($R^2=0.196^*$), porosity Y=-3.11X+215.9($R^2=0.220^*$) and silt content Y=-0.75X+67.85($R^2=0.178^*$). The yield was correlated with soil depth Y=0.263X+0.971($R^2=0.105^*$), clay content Y=-0.688X+32.74($R^2=0.158^*$), porosity Y=1.974X-93.19($R^2=0.231^{**}$) and silt content Y=53.05X-108.65($R^2=0.232^*$), The optimum cultivated land of perennial platycodon was soil depth over 1m, soil hardness under $5kg\;cm^{-2}$, bulk density $1.0Mg\;m^{-3}$, moisture content 13~17%. clay content 5~10%, porosity 58~63%, silt content 38~64% and soil texture of silt loam.

도라지 재배지 32개 농가의 토양 물리적 성질을 조사하고 근경부패병 발병 및 수량에 미치는 영향을 조사한 결과는 다음과 같다. 발병율과 유효토심은 Y = -0.747X + 88.19($R^2=0.394^{***}$), 토양경도는 Y = 4.36X + 8.93($R^2=0.201^*$), 용적밀도는 Y = 104.7X - 80.99($R^2=0.295^{**}$), 점토함량과는 Y = 1.24X + 14.14($R^2=0.196^*$), 토양공극과 Y= -3.l1X + 215.9($R^2=0.220^*$), 미사함량과는 Y = -0.75X + 67.85($R^2=0.178^*$)의 상관을 나타냈다. 수량은 토심과 Y = 0.263X + 0.971($R^2=0.105^*$), 경도는 Y = -1.712X + 30.60($R^2=0.109^*$), 자갈함량은 Y= -0.9172X + 45.74($R^2=0.113^*$), 점토함량은 Y = -0.688X+32.74($R^2=0.158^*$), 공극률은 Y = 1.974X -93.19($R^2=0.231^*$), 미사함량 Y = 53.05X - 108.65($R^2=0.232^{**}$)의 상관이 있었다. 위의 결과 다년생 도라지 재배적지는 유효토심 1m 이상, 토양경도는 $5kg\;cm^{-2}$ 이하, 용적밀도는 $1.0Mg\;m^{-3}$ 정도, 공극율은 58~63%, 수분함량은 13~17%, 점토함량은 5~10%, 미사함량은 38~64%가 좋은 것으로 나타났으며 토성은 미사질양토가 가장 좋은 것으로 분석되었다.

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