Effects of paper ash on the neutralization of nursery soil acidity

종이 소각재의 육묘상토(育苗床土)에 대한 산도교정(酸度矯正) 효과(效果) 연구(硏究)

  • Kim, Chang-Yong (Division of Environmental Agriculture Research, Kyongbuk A.T.A.) ;
  • Lee, Dong-Hoon (Dept. of Agricultural Chemistry, Collage of Agriculture, Kyungpook National University) ;
  • Park, No-Kwuon (Division of Environmental Agriculture Research, Kyongbuk A.T.A.) ;
  • Kim, Jong-Soo (Division of Environmental Agriculture Research, Kyongbuk A.T.A.) ;
  • Seo, Young-Jin (Division of Environmental Agriculture Research, Kyongbuk A.T.A.)
  • Published : 2001.12.30

Abstract

The paper industry produces about 6,000 ton of paper ashes yearly with by-products in Yuhan-Kimberly Ltd. The paper ashes was analyzed and evaluated for their potential as the soil acidity amendment materials. This study was conducted to investigate a reasonable amount of paper ashes for soil acidity amendment effect to be applied onto raising seedling of Calendula officinalis L. The mixed proportion of applied ashes, which was compared with agricultural lime, was treated to 0, 5, 10 and 15% (v/v) in mixed soil (pH 6.0) and the peat moss (pH 3.8) respectively. Consequently paper ashe was found to be more effective than agricultural lime at germination percentage, growth condition and in sharp initial increase of soil pH. The appropriate proportion of applied paper ash was 10% (v/v) at the soil-mix, and 15% (v/v) at the peat-moss. Soil application of paper ashes may provide supplemental quantities of K, Ca, Mg and other plant nutrients. But heavy metal concentrations in paper ash was low and should not limit application rates.

제지부산물인 종이소각재의 산도교정 효과와 적정 혼합비율을 구명하기 위하여 산도가 다른 두 육묘상토를 사용하여 개량제 혼합비율별로 발아율, 생육상황 및 시험전후 토양의 이화학적인 특성을 살펴본 결과는 다음과 같다. 1. 종이소각재는 pH가 11.4로 강알카리성이었으며, 중금속 함량은 부산물 비료의 규제농도 보다는 낮았다. 2. 처리별 발아 및 묘의 생육은 배합토에서는 종이소각재를 0, 5% (v/v)혼합시 발아율이 높았고, 후기생육은 10% (v/v) 혼합이 가장 좋았다. 피트머스의 경우는 소각재 5% (v/v) 혼합율이 높았고, 생육은 10, 15% (v/v) 혼합시 가장 양호하였다. 3. 개량제 혼합 비율별 육묘상토의 이화학적 변화정도는 배합토와 피트머스 모두 종이소각재 처리가 소석회보다는 산도교정 정도는 낮았으나 산도교정 효과는 인정되었으며, 혼합비율이 높을수록 유기물 함량은 적었고, 치환성 양이온의 함량은 많았다. 4. 육묘상토의 중금속함량은 피터머스와 종이소각재를 혼합한 경우 그 함량이 증가하였으며 특히 크롬 (Cr)의 경우 토양오염 우려기준치 보다 높았다.

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