• 현장농수산연구지
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• 제22권1호
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• pp.15-25
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• 2020

본 연구는 양파에 친환경제제로 사용되는 석회유황합제를 농도별(100, 200, 300배)로 희석하여 양파에 처리하여 생육특성과 페놀화합물 함량의 변이를 알아보기 위해 수행되었다. 그 결과 석회유황합제 처리 후 양파의 구 중, 구 너비, 구 고와당 함량에 영향을 미치지는 못했다. 또한 페놀화합물 함량에서 p-coumaric acid, caffeic acid, ferulic acid, rutin, kaempferol은 무 처리구와 큰 차이를 보이지 않았다. 하지만 benzoic acid는 석회유황합제 100배를 처리하였을 때 유의하였고, quercetin 함량은 처리구인 석회유황합제 200배(106.7 ㎍/g D.W.)와 300배(106.1 ㎍/g D.W.)가 100배(89.4 ㎍/g D.W.)와 무 처리구(96.4 ㎍/g D.W.) 보다 다소 높은 함량을 보여 유의하였다. 따라서 석회유황합제는 bezoic acid와 quercetin 함량 변화에 영향을 미쳤다고 판단된다. 본 연구결과가 농가 현장에 적용되기 위해서는 좀 더 넓은면적에서 실증 시험을 더 해야할 것으로 판단된다.

• 한국토양비료학회지
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• 제50권5호
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• pp.401-408
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• 2017

Organic amendments such as animal waste compost, lime-bordeaux mixture, and lime sulphur mixture contain heavy metal(loid)s which are toxic to human being, animal, and plant. The objective of this study was to compare heavy metal(loid)s contamination of soil between conventional and organic farm. Soil samples were collected from 10 conventional and 38 organic fruit farms. At each sampling point, top (0~15 cm) and sub soil (15~30 cm) were taken using hand auger. Total concentration for arsenic (As), cadmium (Cd), copper (Cu), nikel (Ni), lead (Pb), and zinc (Zn) in the collected soil were measured. The pollution index (PI) for heavy metal in organic farms indicated it was unpolluted area. However, mean value of PI for organic farms (0.143) was higher than that for conventional farms (0.122). High Geoaccumulation index (Igeo) for Cu, Pb, and Zn implied that grape farms were more polluted than others fruit farms because a lot of lime-bordeaux mixture and lime sulphur were applied in organic grape farms. Especially, top soils showed higher level of contamination than sub soil. Based on the above results, organic amendments might cause accumulation of heavy metals in soil. Therefore, particular attention should be paid for concentration of Cu, Pb, and Zn, when organic amendments are used in the organic fruit farms.

• 한국토양비료학회지
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• 제50권4호
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• pp.318-324
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• 2017

Lime bordeaux mixture (LBM) and lime sulfur mixture (LSM) are representative environmental friendly organic materials for prevention of insect pests in South Korea. Recently, those have been widely used as an alternative for chemical pesticides in eco-friendly farms. However, South Korea has not established even recommendation of LBM and LSM considering the stability of heavy metals in soil. The aim of this study was to evaluate the accumulation of hazardous heavy metals in soil and plant with long-term application of LBM and LSM. Firstly, we investigated the amount of LBM and LSM used per year in several eco-friendly farms to determine a standard application rate of both materials. The pepper plant was grown on the pot in greenhouse for 14 weeks. Both materials were applied at 0, 1, 3, and 9 times of standard application rates (2.56 and $1.28L\;ha^{-1}$ of LBM and LSM per year, respectively). Dry matter yield of pepper and heavy metals (As, Cd, Cu, Hg, Ni, Pb, and Zn) concentration in soil and pepper plant were measured after 14 weeks. Yield of pepper plant did not significantly chang with up to application rate of 1 times, thereafter it markedly decreased with more than 3 times. With increasing LBM and LSM application, the concentration of Cu and Zn in soil significantly increased. Especially, Zn concentration in pepper significantly increased with increasing application rates of both materials. This might resulted in significant decrease in dry matter yield of pepper. The concentrations of those heavy metals in soil did not exceed safety levels ($150mg\;kg^{-1}$ for Cu and $300mg\;kg^{-1}$ for Zn) established by the Korean Soil Environmental Conservation Act as well as concentration of heavy metals in pepper plant by Korean Ministry of Food and Drug Safety. However, particular attention should be paid for heavy metal safety and crop productivity when using LBM and LSM in the organic farm.