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신간척지에서 토양 염농도가 청보리 생육, 수량 및 양분 흡수에 미치는 영향

Effect of Soil Salinity on Growth, Yield and Nutrients Uptake of Whole Crop Barley in Newly Reclaimed Land

  • 이상복 (농촌진흥청 국립식량과학원 벼맥류부) ;
  • 조광민 (농촌진흥청 국립식량과학원 벼맥류부) ;
  • 신평 (농촌진흥청 국립식량과학원 벼맥류부) ;
  • 양창휴 (농촌진흥청 국립식량과학원 벼맥류부) ;
  • 백남현 (농촌진흥청 국립식량과학원 벼맥류부) ;
  • 이경보 (농촌진흥청 국립식량과학원 벼맥류부) ;
  • 백승화 (충북도립대학 바이오식품공학과) ;
  • 정덕영 (충남대학교 생물환경화학과)
  • Lee, Sang-Bok (Department of Rice and winter cereal crop, NICS, RDA) ;
  • Cho, Kwang-Min (Department of Rice and winter cereal crop, NICS, RDA) ;
  • Shin, Pyung (Department of Rice and winter cereal crop, NICS, RDA) ;
  • Yang, Chang-Hyu (Department of Rice and winter cereal crop, NICS, RDA) ;
  • Back, Nam-Hyun (Department of Rice and winter cereal crop, NICS, RDA) ;
  • Lee, Kyeong-Bo (Department of Rice and winter cereal crop, NICS, RDA) ;
  • Baek, Seung-Hwa (Department of Biofood Science and Biotechnology, Chungbuk Proboncial University of Science & Technology) ;
  • Chung, Doug-Young (Department of Bio Environmental Chemistry, Chungnam University)
  • 투고 : 2013.10.20
  • 심사 : 2013.12.12
  • 발행 : 2013.12.31

초록

신간척지에서 청보리의 안정재배를 위한 토양 염농도를 제시하기 위하여 새로 조성된 새만금간척지에서 토양염농도(EC) 0.8, 3.1, 6.5, 11.0 dS/m에 해당하는 지점을 선정하고, 화학비료로 $N-P_2O_5-K_2O$=150-100-100 kg/ha를 시용한 후 2011년 10월 26일에 영양보리를 220kg/ha 파종하였다. 재배기간중 토양 염농도는 수확기>출수기>파종기>월동기 순으로 파종기에 비해 수확기에 1.4~4.2배 상승하였다. 염농도가 높을수록 발근에 지장을 초래하여 지상부 생육도 저조하였고 특히 EC 11.0 ds/m에서 출현은 하였으나 겨울철이 지난 후 고사하였다. 수량은 토양염농도 0.8 dS/m(8.8 MT/ha)에 비해 3.1 dS/m과 6.5 dS/m에서 각각 68 %, 35 % 수준이었다. Proline함량은 생육초기가 수확기보다, 그리고 염농도가 높을수록 많았다. 수확기의 $Na_2O$와 MgO 함량은 염농도가 높을수록 많았고 N, $P_2O_5$, $K_2O$ 및 CaO 함량은 염농도가 높을수록 적었다. 따라서 토양 염농도가 3.1 dS/m이상으로 높아짐에 따라 청보리의 지하부와 지상부에 심각한 생육저해로 양분의 불균형 흡수를 초래하여 수량이 저조하기 때문에 안정한 청보리 생산을 위해서는 지하 배수시설 또는 관개수를 이용하여 3.1 dS/m이하로 염농도를 떨어뜨린 후 재배하는 것이 바람직할 것으로 판단된다.

키워드

Soil salinity;reclaimed land;whole-crop-barley

과제정보

연구 과제번호 : Cooperative Research Program for Agriculture Science & Technology Development

연구 과제 주관 기관 : Rural Development Administration

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피인용 문헌

  1. Investigation of Soil Physico-chemical Properties in Saemangeum Reclaimed Tidal Land in Korea vol.49, pp.4, 2016, https://doi.org/10.7745/KJSSF.2016.49.4.347
  2. Effects of Liquid Pig Manure Application Level on Growth Characteristics, Yield, and Feed Value of Whole Crop Barley at Reclaimed Tidal Land in Southwestern Korea vol.47, pp.6, 2014, https://doi.org/10.7745/KJSSF.2014.47.6.579