广西师范大学学报（自然科学版）2026，Vol.44Issue(4)：159-169,11.DOI:10.16088/j.issn.1001-6600.2025062701
基施钢渣和石灰渣对水稻吸收转运镉的影响
Effect of basal application of steel slag and lime slag on uptake and translocation of cadmium in rice
摘要
Abstract
Cadmium(Cd)contamination in agricultural soils has become increasingly prominent,exerting a serious impact on the growth and quality of rice and other major crops,thereby threatening the stability of agricultural ecosystems and human health.To investigate the application potential of industrial by-products in the remediation of Cd-contaminated soil,this study focused on two typical industrial by-products from Guangxi,steel slag(SS)and lime slag(LM),and examined their effects on Cd bioavailability in the soil-rice system through soil incubation and rice pot experiments.The soil incubation experiment was conducted with different application rates of SS and LM(1,2,5,7,and 10 g·kg-1,denoted as SS1,SS2,SS5,SS7,SS10 and LM1,LM2,LM5,LM7,LM10,respectively).The results showed that soil pH and available silicon content increased with increasing application rates of SS and LM,while soil redox potential(Eh)decreased.Compared with the control(CK),SS2 and LM10 had the best effect on reducing soil diethylenetriaminepentaacetic acid extractable Cd(DTPA-Cd)content,decreasing 49.32％and 42.43％,respectively.The rice pot experiment was conducted with different application rates of steel slag(SS)(1,2,3,and 5 g·kg-1,denoted as SS-R1,SS-R2,SS-R3,SS-R5)and lime slag(LM)(1,3,and 5 g·kg-1,denoted as LM-R1,LM-R3,LM-R5).The results showed that the application of steel slag and lime slag affected Cd uptake by rice.Specifically,SS-R3 and LM-R5 significantly reduced soil DTPA-Cd content and Cd concentrations in rice roots,stems,leaves,and brown rice(P<0.05).Compared with CK,the reductions were 40.00％,80.59％,86.83％,78.13％,and 78.57％for SS-R3,and 40.91％,24.77％,60.41％,65.53％,and 69.05％for LM-R5,respectively.The brown rice Cd contents across treatments followed the order:CK(0.38 mg·kg-1)>LM-R1(0.25 mg·kg-1)>SS-R1(0.22 mg·kg-1)>LM-R3(0.19 mg·kg-1)>SS-R5(0.17 mg·kg-1)>LM-R5(0.12 mg·kg-1)>SS-R2(0.09 mg·kg-1)>SS-R3(0.07 mg·kg-1).Notably,the brown rice Cd contents in the SS-R2,SS-R3,SS-R5,LM-R3,and LM-R5 treatments met the national food safety standard(<0.2 mg·kg-1,GB 2762-2022).In conclusion,the industrial by-products steel slag and lime slag significantly reduced soil Cd bioavailability and inhibited Cd uptake by rice,with steel slag demonstrating superior efficacy in reducing Cd content in various rice tissues compared to lime slag.关键词
钢渣/石灰渣/水稻/镉污染/土壤/工业副产物Key words
steel slag/lime slag/rice/cadmium pollution/soil/industrial by-products分类
资源环境引用本文复制引用
韦丽媛,韦秀连,刘莹儿,黄静,罗冬梅,徐子琴,陈喆..基施钢渣和石灰渣对水稻吸收转运镉的影响[J].广西师范大学学报（自然科学版）,2026,44(4):159-169,11.基金项目
广西自然科学基金(2025GXNSFAA069356) （2025GXNSFAA069356）
南方石山地区矿山地质环境修复工程技术创新中心开放课题(NFSS2023020) （NFSS2023020）
广西师范大学大学生创新创业训练计划(202410602054,S202410602162) （202410602054,S202410602162）
