Monitoring of Heavy Metals in Agricultural Soils from Consecutive Applications of Commercial Liquid Pig Manure

Abstract

BACKGROUND:Increase of heavy metals in agricultural ecosystem has become a social issue nationwide as it is related to public health. This study was performed to find out the status and long-term trends with consecutive application with the commercial liquid pig manure in the agricultural fields. METHODS AND RESULTS: Heavy metals including arsenic, cadmium, copper, lead, nickel, and zinc were analyzed in the 41 samples of paddy fields and 54 samples of upland fields consecutively applied with commercial liquid pig manure for 0 to 16 years. Heavy metal accumulation were not increased statistically at the both paddy and upland fields as the consecutive application year of commercial liquid pig manure were increased. However, some of surveyed upland soils exceeded the criteria of cadmium, copper, and zinc designated by the Soil Environmental Conservation Act in Korea. CONCLUSION: Therefore, analysis of heavy metals, specially copper and zinc, in agricultural fields is absolutely necessary before liquid pig manure application to the fields. In addition, heavy metal accumulation in agricultural fields following

Infiltration Rates of Liquid Pig Manure with Various Dilution Ratios in Three Different Soil

“…한편 폭기형태나 저장조의 유형, 전처리 과정 등 액비생산 시스템의 특징에 따라 생산되는 액비의 이화학적 특성이나 고 형물 형태의 슬러지의 양이나 특성에 차이가 매우 크다 (Kim, 2012). 그러므로 폐수에 포함된 유기물함량이나 부유고형물질 의 양이 증가할수록 폐수에 포함된 유기물이 토양공극에 남게 되어 토양막힘현상이 증가되어 수분침투력을 급격하게 낮출 뿐만 아니라 공기 유통에 영향을 미쳐 토양을 환원상태로 전 환시키는 것으로 알려져 있다 (Siegrist and Thresher, 1985;Siegrist, 1987 (Table 2) 액비원액은 pH, EC, TDS, OM, Ash함량, T-N, T-P 그리고 수용성 상태의 질산태질소와 인산이온의 함량을 조사하였다 (Table 3).…”