Salt Accumulation and Desalinization of Rainfall Interception Culture Soils of Rubus sp. in Gochang-gun, Jeollabuk-do

복분자 비가림 하우스 토양 중 염류집적 요인과 물리적 제염효과

  • Chung, Byung-Yeoup (Advanced Radiation Technology Institute, KAERI) ;
  • Lee, Kang-Soo (Crop Production and Technology Major, Chonbuk National University) ;
  • Kim, Myung-Kon (Department of Food Science & Biotechnology, Chonbuk National University) ;
  • Choi, Young-Hee (Gochang Agriculture Technical Center) ;
  • Kim, Moo-Key (Bio-environmental Science Major, Chonbuk National University) ;
  • Cho, Jae-Young (Bio-environmental Science Major, Chonbuk National University)
  • 정병엽 (한국원자력연구원 방사선과학연구소) ;
  • 이강수 (전북대학교 작물생산공학) ;
  • 김명곤 (전북대학교 바이오식품공학) ;
  • 최영희 (고창군 농업기술센타) ;
  • 김무기 (전북대학교 생물환경학) ;
  • 조재영 (전북대학교 생물환경학)
  • Received : 2008.07.19
  • Accepted : 2008.09.25
  • Published : 2008.10.30

Abstract

This study was carried out to investigate the factors of desalinization of the rainfall interception culture soils of Rubus sp. in Gochang-gun, Jeollabuk-do. Soil samples were collected from 85 different sites of the rainfall interception culture soils of Rubus sp. in Gochang-gun, Jeollabuk-do. The electrical conductivity in paste saturation of rainfall interception culture soils ranged from $1.0\sim28.4dS\;m^{-1}$ (average: $4.8dS\;m^{-1}$) and salt affected soil which EC was higher than $4dS\;m^{-1}$, covered nearly 55% of all field surveyed. Salts in rainfall interception culture soils were accumulated by increasing the cultivation period. Electrical conductivity in rainfall interception culture soils was positively correlated with water soluble anions such as chloride ion ($r=0.85^{**}$), nitrate ion ($r=0.94^{**}$), phosphate ion ($r=0.88^{**}$), and sulfate ion ($r=0.84^{**}$), respectively. As a result of desalinization experiments carried out by water management practices, the rinsing method was more effective than leaching method.

포화추출액중 전기전도도는 $1.0\sim28.4dS\;m^{-1}$의 범위로 평균 $4.8dS\;m^{-1}$를 나타내어 매우 높은 농도로 염류가 집적되고 있었다. 전기전도도 $4dS\;m^{-1}$ (포화추출액 조건으로 환산)를 초과한 경우가 전체의 55%를 차지하고 있었다. 복분자 비가림하우스 재배토양 중 전기전도도와 각각의 무기이온과의 단순상관관계를 조사한 결과, 전기전도도와 염소 ($r=0.85^{**}$), 질산 ($r=0.94^{**}$), 인산 ($r=0.88^{**}$), 황산 ($r=0.84^{**}$) 이온과 같은 음이온과 고도의 유의성 있는 정(+)의 상관관계를 나타내었고, 마그네슘 ($r=0.41^*$), 칼슘 ($r=0.38^*$), 칼리 ($r=0.47^*$) 이온과 같은 양이온과는 유의성 있는 정(+)의 상관관계를 나타내었다. 비가림 하우스형 복분자 재배토양 중에 함유되어 있는 염류집적 유발물질을 제거하는데 있어 작업의 편이성, 농업용수의 절감 및 처리시간 등을 고려하였을 때 용탈법보다 수세법이 더 효과적인 것으로 나타났다.

Keywords

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