沼肥施用对土壤和不同作物的重金属含量及风险影响Meta分析

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中图分类号：X53；X173；S141 文献标志码：A 文章编号：1672-2043（2025）10-2653-11 doi：10.11654/jaes.2024-1090

Abstract：Inordertoevalteiskofheaymetalaculationinsoilanddifentcrosduetotaplationofogasfertilte effectsofbiogasfertilizerapplicationonheavymetalcontentsinsoilanddiferentcopswerecomprehensivelyaalyzedbasdoMeta analysismethodwith3Ovalidatafrom6literatures.Teresultsshowedtattheaplicationofiogasfertlizercreasdtecotent of five heavy metals（Hg，Pb， Cd， Cr and As） in soil by 19.1% ， 2.0% ， 11.2% ，12.6% and 59.7% ，respectively，and there was a significant difference between the five heavy metal elements affected by biogas fertilizer application（ P <0.05）.The proportion of Hg and Cd in the soil with high risk and above after the application of biogas fertilizer was 48.3% and 47.7% ，respectively，while Pb， Cr and As were at low risk. Biogas fertilizer application increased the pH of acidic soil，and the content of soil heavy metals Pb and As was positively correlated with soilpH，while the content of soil heavymetals Hg wasnegativelycorrelated with soil pH.The applicationof biogas fertilizer increased content of Pband Cr in grain by 0.4% and 38.4% ，increased content of Pb and Cr in vegetable crops by 10.6% and 44.3% . And there was noobviousacuulationpateofCdontentsintetwoyesofops，ndtereasosigncantdiferenceintetsfigas fertlizeraplicationonthePb，CdandCrcontentsoftetwotypesofcrops.Theresultsofumanintakeriskevaluationshowedthatthe targethazardcoeficients（THQ）ofvegetablecropswere.50-626foradultsand0728-0.894forchdren，whichwerehghranthe THQvaluesoffodcropsfadults（0.8-0487）andchldren（0.15-.662）respectively.TheaverageTHQoffodndvegeablecos werewithinthestandardvalueof1.Therefore，thereisnohealthriskofconsumingthetwotypesofcropsappliedbybiogafertlizer. Keywords：biogas digestate; heavy metals; Meta-analysis; soil; crops; risk evaluation

沼气工程是实现畜禽粪污处理和生态种养循环的重要途径，在农业绿色低碳转型中发挥着重要作用。（剩余20286字）