福建农业学报2024，Vol.39Issue(12)：1374-1384,11.DOI:10.19303/j.issn.1008-0384.2024.12.007
蔬菜对土壤五氯硝基苯-镉复合污染富集效应的种间差异研究
PCNB and Cd Accumulations in Vegetables Grown on Contaminated Soil
摘要
Abstract
[Objective]Variations in accumulating PCNB and Cd of different species of vegetables grown on a contaminated soil were studied.[Method]Different concentrations of contaminated soil were prepared(PCNB:0.44-9.88 mg·kg-1;Cd:0.35-1.96 mg·kg-1),and a pot experiment was conducted to determine the dry weight of vegetables and analyze the concentrations of PCNB and Cd within the vegetables,monitoring the growth and pollutant absorption/accumulation of Lactuca sativa(CL),L.sativa var.longifolia(RL),Brassica rapa subsp.chinensis(PC),Raphanus sativus(RR),and L.sativa var.angustata(AL)in PCNB-Cd contaminated soil.[Result]Light and medium levels(i.e.,0.44-6.74 mg·kg-1)of PCNB pollution on the soil stimulated growth of the leafy vegetables tested.However,when the contamination reached the severe level at 9.88-9.96 mg·kg-1,the growth was significantly inhibited.And all levels of the contamination were detrimental to growth of the root vegetables.Cd pollution at between 0.35 mg·kg-1 and 1.96 mg·kg-1 cut the biomass production on all 5 vegetables.In combination,PCNB at 0.47-9.88 mg·kg-1 and Cd at 0.46-1.63 mg·kg-1 resulted in varied effects on the vegetable growth.The PCNB contents in the leaves of CL,RL,PC,and AL grown on the severely contaminated soil exceeded the food safety threshold,but the roots of RR and stems of AL did not.Meanwhile,Cd in AL leaves significantly rose to a level surpassing the standard by 60 times,which was followed by the level in the stems of AL and that in the roots of RR.Overall,PCNB absorbed by the vegetables or part of the plants ranked as AL leaves＞PC＞AL stems＞RL＞CL＞RR,and Cd in the order of AL leaves＞AL stems＞RR＞PC＞CL＞RL(P＜0.05,n=5).[Conclusion]The soil contaminated with PCNB-Cd did not significantly affect the absorption of the pollutants individually by the vegetables.In general,L.sativa and L.sativa var.longifolia accumulated PCNB and Cd less than the other tested vegetables making them more suitable for farming on lands moderately polluted with PCNB-Cd.关键词
五氯硝基苯/镉/复合污染/富集效应/蔬菜Key words
pentachloronitrobenzene/cadmium/combined contamination/bioconcentration effect/vegetables分类
农业科技引用本文复制引用
潘声旺,杨湘豫,沈加伟,杨程鹏,陈春坛,高杨..蔬菜对土壤五氯硝基苯-镉复合污染富集效应的种间差异研究[J].福建农业学报,2024,39(12):1374-1384,11.基金项目
四川省农村发展研究中心项目(CR2001) （CR2001）
乡村低成本环境治理技术四川省高校重点实验室开放基金项目(XCH 2023ZA-01) （XCH 2023ZA-01）
成都大学2022 年校级实验教学研究与改革项目(cdsyjg2022004) （cdsyjg2022004）
