CAJ | 학술논문

采用水稻盆栽实验，对施用组配改良剂（石灰石+海泡石）前后盆栽土壤的酸碱性、有机质含量和营养元素有效态含量，盆栽水稻糙米Pb、Cd含量进行分析和评价。结果显示：施用组配改良剂能够降低水稻糙米Pb、Cd含量，显著提高土壤pH值（从5.57到7.34）和土壤CEC（添加量达到16 g·kg-1时，比对照提高217%）；但是施用组配改良剂对土壤有机质含量影响未达显著水平，其变化率在-2%到7%之间。另一方面，施用组配改良剂对土壤中营养元素（Ca、Mg）有效态含量有提高作用，最多比对照分别提高293%和22%；组配改良剂添加量与土壤中碱解N、有效P、速效K含量无显著相关性；施用组配改良剂会降低微量营养元素Fe有效态的含量，但添加量与有效态含量并无显著相关性。因此，本研究表明，施用这种组配改良剂到重金属污染土壤，能够有效改善土壤环境，提高保肥能力，降低糙米Pb和Cd的含量。
채용수도분재실험，대시용조배개량제（석회석+해포석）전후분재토양적산감성、유궤질함량화영양원소유효태함량，분재수도조미Pb、Cd함량진행분석화평개。결과현시：시용조배개량제능구강저수도조미Pb、Cd함량，현저제고토양pH치（종5.57도7.34）화토양CEC（첨가량체도16 g·kg-1시，비대조제고217%）；단시시용조배개량제대토양유궤질함량영향미체현저수평，기변화솔재-2%도7%지간。령일방면，시용조배개량제대토양중영양원소（Ca、Mg）유효태함량유제고작용，최다비대조분별제고293%화22%；조배개량제첨가량여토양중감해N、유효P、속효K함량무현저상관성；시용조배개량제회강저미량영양원소Fe유효태적함량，단첨가량여유효태함량병무현저상관성。인차，본연구표명，시용저충조배개량제도중금속오염토양，능구유효개선토양배경，제고보비능력，강저조미Pb화Cd적함량。
Chemical fixation is one of remediation techniques for heavy metal contaminated soils. This study was designed to examine and e-valuate the effects of combined amendments(calcium carbonate+sepiolite)on soil pH, organic matter content, available micronutrients in soil, and contents of Pb and Cd in brown rice. Compared to the control, application of combined amendments decreased contents of Pb and Cd in brown rice, and elevated soil pH(from 5.57 to 7.34)and CEC by 217% at 16 g·kg-1 of combined amendments). No significant changes were observed in soil organic matter(range from-2%to 7%). Soil exchangeable Ca and Mg were enhanced by 293%and 22%, re-spectively, after application of combined amendments. Soil available N, P and K did not show significant correlationship with amounts of combined amendments. Soil available Fe reduced in the amendment treatments, but had no relation with application rates. These results in-dicate that application of combined amendments(calcium carbonate+sepiolite)could increase soil pH, improve soil nutrient holding ca-pacity, and decrease heavy metals in brown rice.