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Effect of Water Treatment Sludge on Growth of Rice Seedling

수도 유묘생장에 미치는 정수장슬러지 처리효과

  • 이인복 (농촌진흥청 원예연구소 원예토양관리팀) ;
  • 임재신 ((주)카보텍) ;
  • 장기운 (충남대학교 농업생명과학대 생물환경화학과)
  • Published : 2006.12.31

Abstract

To know the effect of water treatment sludge (WTS) as a rice seedling culture soil, rice seeds are sown, germinated and grown on the culture soils mixed with different ratios of WTS to sand (100:0, 50:50, 30:70, respectively), and their growth effects was compared to that of control, commercial culture soil. When WTS is used as a culture soil for rice, the length and weight of the top part of rice seedling somewhat decreased than those of control treatment while their root length and weight in all WTS treatments significantly increased. Although phosphorus and potassium uptake of rice seedling in WTS treatments was slightly decreased, WTS treatment showed to develop root growth which is necessary in the seedling stage of all plane. Such a stimulatory effect on root growth of rice seedling was significant in the mixture ratio of 50% WTS to 50% sand.

정수장슬러지의 수도육묘용 상토로서의 사용 가능성을 검토하기 위하여 정수장슬러지와 모래의 비율을 달리하는 상토들을 조제 후 시판용 상토를 대조로 수도유묘의 생육 및 무기성분흡수 특성을 조사하였다. 정수장슬러지 이용 상토는 시판용 상토에 비해 수도유묘 지상부의 신장 및 생중량이 다소 부진하고 인의 흡수량이 낮았던 반면, 지하부의 신장 및 생중량은 현저한 증가를 보여 정수장슬러지가 수도유묘의 뿌리발달에 탁월하고 뿌리의 매트형성이 우수하였다. 따라서 비록 정수장슬러지 이용 상토가 시판용 상토에 비해 수도유묘의 지상부 생장이 부진하고 인의 흡수가 다소 낮다 할지라도, 상토의 필수 조건인 뿌리의 매트형성이 탁월하고 단간의 지상부가 직립으로 매우 건실하며, 높은 pH에도 불구하고 입고병과 같은 병 발생이 없어 수도육묘용 상토로 이용 가능성이 높은 것으로 판단된다. 정수장슬러지 첨가에 따른 이러한 수도육묘의 뿌리생장 증가 효과는 정수장슬러지와 모래를 50:50 비율로 혼합한 상토에서 가장 우수하였다.

Keywords

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