[논문]벼의 비소흡수와 축적에 미치는 볏짚퇴비의 효과

정하일; 김명숙; 전상호; 이태구; 채미진

doi:10.5333/kgfs.2022.42.2.108

[국내논문] 벼의 비소흡수와 축적에 미치는 볏짚퇴비의 효과
Effect of Rice Straw Compost on Arsenic Uptake and Accumulation in Rice (Oryza sativa L.) 원문보기

한국초지조사료학회지 = Journal of the Korean Society of Grassland and Forage Science, v.42 no.2, 2022년, pp.108 - 113

정하일 (국립농업과학원 토양비료과) , 김명숙 (국립농업과학원 토양비료과) , 전상호 (국립농업과학원 토양비료과) , 이태구 (국립농업과학원 토양비료과) , 채미진 (국립식량과학원 재배환경과)

초록
AI-Helper

본 연구는 비소오염토양에 볏짚퇴비 시용량 증대가 토양의 화학성, 벼의 생육 특성 그리고 식물체의 비소함량에 미치는 영향을 평가하였다. 비소오염토양 중 볏짚퇴비 시용량이 증가하면서 벼 생육단계(분얼기, 출수기 및 수확기) 모두에서 지상부 비소함량 및 축적량은 감소되었다. 결과적으로 비소오염토양에 볏짚퇴비의 시용에 따른 토양교질 내의 다양한 음전하가 증가되고, 이로 인하여 비소의 흡착능력이 향상됨으로써 토양에서 벼 식물체로의 흡수 및 축적량을 감소시키는 것으로 판단된다. 따라서 비소오염토양에 볏짚퇴비의 시용은 벼 지상부로의 비소흡수·축적을 감소시키는 하나의 요인이 될 수 있으며, 안전한 농산물 및 가축의 조사료 생산을 위한 벼 재배관리에 적용할 수 있을 것으로 판단된다.

Abstract ▼ AI-Helper

Arsenic (As) uptake and accumulation from agricultural soil to rice vary depending on the soil environmental conditions such as soil pH, redox potential, clay content, and organic matter (OM) content. Therefore, these factors are important in predicting changes in the uptake and accumulation of As in rice plants. Here, we studied the chemical properties of As-contaminated and/or rice straw compost (RSC)-treated soils, the growth responses of RSC-applied rice plants under As-contaminated soils, the changes in As content of soil, and the relationship between As uptake and accumulation from the RSC-treated soils to the rice organs under As-contaminated soils. Rice plants were cultivated in 30 mg kg-1 As-contaminated soils under three RSC treatments: 0 (control), 12, and 24 Mg ha-1. No significant differences were indicated in the chemical properties of pre-experimental (before transplanting rice seedling) soils, with the exception of EC, OM, and available P2O5. As the treatment of RSC under 30 mg kg-1 As-contaminated soils increased, EC, OM, and available P2O5 increased proportionally in soil. Increased soil RSC under As-contaminated soils increased shoot dry weight of rice plants at harvesting stage. As content in roots increased proportionally with RSC content, whereas As content in shoots decreased under As-contaminated soil at all stages of rice plants. Nevertheless, As accumulation were significantly decreased in both roots and shoots of RSC-treated rice plants than those in the plants treated without RSC. These results indicate that the use of RSC can mitigate As phytotoxicity and reduce As accumulation in rice plants under As-contaminated soils. Therefore, RSC can potentially be applied to As-contaminated soil for safe crop and forage rice production.

Keyword

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