토양 물리적특성이 도라지 근경부패병에 미치는 영향

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

  • 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)
  • 발행 : 2000.02.28

초록

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.

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.

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