Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Effects of Reclaimed Wastewater and Waste Nutrient Solution Irrigation on Seedling Growth of Chinese Cabbage

하수처리수 및 폐양액의 재이용이 배추 유묘 생장에 미치는 영향

  • Hong, Ki-Chan (College of Agriculture and Life Sciences, Kangwon National University) ;
  • Choi, Bong-Su (College of Agriculture and Life Sciences, Kangwon National University) ;
  • Lim, Kyoung-Jae (College of Agriculture and Life Sciences, Kangwon National University) ;
  • Won, Jae-Hee (Gangwondo Agricultural Research and Extension Services) ;
  • Jeon, Shin-Jae (Gangwondo Agricultural Research and Extension Services) ;
  • Hur, Seung-Oh (National Academy of Agricultural Science) ;
  • Ha, Sang-Keun (National Academy of Agricultural Science) ;
  • Kim, Nam-Won (Korea Institute of Construction Technology) ;
  • Yang, Jae-E (College of Agriculture and Life Sciences, Kangwon National University) ;
  • Ok, Yong-Sik (College of Agriculture and Life Sciences, Kangwon National University)
  • Published : 2009.06.30
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Abstract

Water shortages are expected to be a major impact of climate change. This study examined the growth of Chinese cabbage seedling using reclaimed wastewater and waste nutrient solution as alternative irrigation resources. Generally, the concentration of nutrients, such as $K^+$, $NH_4^+$, $Mg^{2+}$, $Ca^{2+}$, $Cl^-$,$NO_3^-$, $PO_4^-$ and $SO_4^{2-}$, in waste nutrient solution was higher than that in wastewater. However, Chinese cabbage seedling irrigated with wastewater was supplied a higher concentration of $Na^+$ and $Cl^-$ than waste nutrient solution. The growth of Chinese cabbage seedling irrigated with waste nutrient solution was similar or higher than those irrigated with groundwater as control, while the growth of those irrigated with wastewater was similar to those irrigated with groundwater. The total nitrogen uptake in Chinese cabbage seedling irrigated with groundwater, waste nutrient solution from organic and inorganic hydroponic cultures, and wastewater was 5.47, 10.02, 5.20, and 4.59 mg/plant, respectively. The nitrogen uptake of Chinese cabbage seedling irrigated with waste nutrient solution from organic hydroponic substrates in a 50% lower dose than recommended was 8.34 mg/plant, which is higher than that of the cabbage irrigated with groundwater. Overall, the results suggest that waste nutrient solution and wastewater can be used as alternate water resources, and can allow a reduction in the amount of fertilizer needed to raise Chinese cabbage seedling.

기후변화로 인해 발생될 수 있는 물 부족 현상에 대응하기 위하여 기존 농업용수에 대한 대체용수로 하수처리수 및 폐양액의 재이용이 유식물 생장에 미치는 영향을 평가하였다. 하수처리수와 폐양액에 대한 수질분석결과 유기배지로부터의 폐양액은 무기배지로부터의 폐양액 및 하수처리수와 비교해서 보다 많은 양분을 함유하고 있었으며 하수처리수에서는 $Na^+$과 $Cl^-$ 함량이 다른 용수보다 높은 것으로 나타났다. 배추묘의 생육은 폐양액 처리구에서 대조구인 지하수 처리구에 비해 유사하거나 촉진되었고 하수처리수 처리구에서는 대조구와 비슷하게 나타났다. 육묘기간 동안 배추묘가 흡수한 질소는 관행재배에서 5.47 mg/plant 이었으며, 유기배지와 무기배지로부터의 폐양액 처리구에서 각각 10.02 mg/plant, 5.20 mg/plant인 것으로 나타났다. 하수처리수 처리구에서는 배추의 질소함량이 4.59 mg/plant으로 나타났다. 관행의 1/2 수준으로 시비하고 유기배지로부터의 폐양액을 처리한 배추의 질소 흡수량은 8.34 mg/plant으로 관행재배보다 높은 것으로 나타나 폐양액 이용 시 육묘에 이용되는 비료의 시용을 줄여야 할 것으로 판단된다. 한편 배추의 인 함량은 관행재배에서 8.9 ${\mu}$g/plant로 나타났으며 유기배지로부터의 폐양액 처리구에서도 관행재배와 비슷한 수준이었다. 반면 인 함량이 낮았던 무기배지로부터의 폐양액과 하수처리수 처리구에서 배추가 흡수한 인산 함량이 가장 높은 것으로 나타났다. 배추묘가 흡수한 양이온의 경우 관행재배에 비해 폐양액과 하수처리수 처리구에서 상대적으로 많은 양을 흡수하였다. 이상의 결과로부터 선정된 폐양액 및 하수처리수에 대한 농업용수로써의 재이용 가능성을 확인할 수 있었으며 향후 현장실험을 통해 작물의 생육특성 및 생산량 평가를 실시하고 대체용수 사용에 따른 환경영향을 평가하는 연구가 진행되어야 할 것으로 판단된다.

Keywords

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  2. Effects of Waste Nutrient Solution on Growth of Chinese Cabbage (Brassica campestris L.) in Korea vol.30, pp.2, 2011, https://doi.org/10.5338/KJEA.2011.30.2.125
  3. Effect of Waste Nutrient Solution and Reclaimed Wastewater on Chinese Cabbage Growth and Soil Properties vol.44, pp.3, 2011, https://doi.org/10.7745/KJSSF.2011.44.3.394