Growth and Biomass Response of Chinese Cabbage to Soil Application of Strontium Chloride Hexahydrate under Different Organic Matter Levels

Sang Rim Kim; Faraaz Ahmed Mohammad; Ji Gu Lee; Mac Cheryl Sulan Charles Emparang; Min Geon Cho; Dae Geun Jeong; Min Jae Kim; Jum-Soon Kang

doi:10.12791/KSBEC.2025.34.3.308

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2025 Vol.34, Issue 3 Preview Page Next Page

Original Articles

Growth and Biomass Response of Chinese Cabbage to Soil Application of Strontium Chloride Hexahydrate under Different Organic Matter Levels 토양처리된 스트론튬이 다양한 유기물 함량 조건에서 배추의 생장 및 생체중에 미치는 영향

31 July 2025. pp. 308-315

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Abstract

This study investigated the effects of varying concentrations of non-radioactive SrCl₂ (50, 100, and 200 mg·kg^-1) and soil organic matter content (5%, 10%, and 15%) on the growth, fresh weight, and chlorophyll content of Chinese cabbage (Brassica rapa) at different growth stages. The results indicated that increasing Sr concentrations significantly reduced plant height, root length, leaf area, fresh weight, and dry weight, with pronounced growth inhibition observed at 200 mg·kg^-1 Sr treatment. In contrast, chlorophyll content (measured by SPAD value) showed no significant differences among treatments, suggesting that Sr has a limited effect on photosynthetic pigments. The adverse effects of Sr on plant growth were alleviated in soils with higher organic matter content, with the most substantial buffering effect observed at 15% organic matter. This is likely due to the mechanism by which organic matter reduces the bioavailability of Sr, thereby inhibiting its uptake by plants. This research quantitatively elucidates the toxic response of crops to Sr and the organic matter-mediated soil buffering effect through experiments using non-radioactive SrCl₂. The findings provide foundational data for the development of strategies for the phytoremediation of radiologically contaminated soils and the production of safe agricultural products.

Keywords

heavy metal

organic matter content

radioactivity

radionuclide

seedling growth

본 연구는 비방사성 SrCl₂를 이용하여 Sr 농도를 50, 100, 200mg·kg^-1 및 토양 유기물 함량을 5%, 10% 및 15%로 달리하여 배추의 생육, 생체중, 엽록소 함량에 미치는 영향을 생육 시기별로 분석하였다. 그 결과, Sr 농도가 증가할수록 초장, 근장, 엽면적, 생체중 및 건물중이 유의하게 감소하였으며, 특히 Sr 200mg·kg^-1 처리에서 생육 저해가 뚜렷하였다. 반면, 엽록소 함량(SPAD)은 처리 간 유의한 차이를 보이지 않아 광합성 색소에는 Sr의 영향이 제한적인 것으로 나타났다. 유기물 함량이 높은 토양에서는 Sr 처리에 따른 생육 저해가 완화되었으며, 특히 유기물 15% 조건에서 완충 효과가 가장 크게 나타났다. 이는 유기물이 Sr의 생물유효도를 감소시켜 식물체 흡수를 억제하는 기작에 의한 것으로 판단된다. 본 연구는 비방사성 SrCl₂를 이용한 실험을 통해 작물의 Sr 독성 반응과 유기물 기반 토양 완충 효과를 정량적으로 규명하였으며, 향후 방사성 오염 토양의 생물학적 복원 및 안전 농산물 생산 전략 수립에 기초자료로 활용될 수 있다.

키워드

방사성 핵종

스트론튬

유기물 함량

유묘생장

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Information

Publisher :The Korean Society for Bio-Environment Control
Publisher(Ko) :(사)한국생물환경조절학회
Journal Title :Journal of Bio-Environment Control
Journal Title(Ko) :생물환경조절학회지
Volume : 34
No :3
Pages :308-315
Received Date : 2025-07-09
Revised Date : 2025-07-22
Accepted Date : 2025-07-22
DOI :https://doi.org/10.12791/KSBEC.2025.34.3.308

Journal of Bio-Environment Control ISSN:1229-4675(Print) 2765-3641(Online) 생물환경조절학회지

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