한국초지조사료학회지 (JKSGFS) Vol. 42 No. 2 (p.108-113)

벼의 비소흡수와 축적에 미치는 볏짚퇴비의 효과

Effect of Rice Straw Compost on Arsenic Uptake and Accumulation in Rice(Oryza sativa L.)
키워드 :
Arsenic,As accumulation,Growth response,Rice,Rice straw compost

목차

ABSTRACT
Ⅰ. 서론
Ⅱ. 재료 및 방법
   1. 토양시료 및 시험식물
   2. 토양화학성 및 토양 내 비소 전함량 분석
   3. 벼 생장반응 분석
   4. 벼 생육단계별 식물체 내 비소함량 및 축적량 분석
   5. 데이터 분석과 통계처리
Ⅲ. 결과 및 고찰
   1. 비소오염토양의 볏짚퇴비 수준별 토양화학성
   2. 볏짚퇴비 수준별 토양 중 비소함량 및 생육변화
   3. 볏짚퇴비 수준별 식물체 내 비소함량 및 축적량
Ⅳ. 요약
Ⅴ. 사사
Ⅵ. REFERENCES

초록

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.