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Effects of soil amendment and foliar selenium applications on cadmium immobilization in soil and accumulation in wheat

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Effects of soil amendment and foliar selenium applications on cadmium immobilization in soil and accumulation in wheat
Wheat cadmium(Cd)contamination is one of the environmental and agricultural concerns worldwide.Here,the effects of applications of foliar selenium(Se)and soil amendments(lime,mixture of biofuel ash and sodium sulfide(DSO),and mixture of iron mine tailing and alkali lignin(MX))on soil Cd fractions and wheat Cd accumulation were studied using laboratory incubation,greenhouse pot,and field plot experiments.In the laboratory incubation experiment,lime and MX applications significantly increased soil pH,DSO application significantly decreased soil pH,while all the three amendments significantly reduced soil bioavailable Cd fractions by 16％-21％compared to the control without any amendment.Foliar Se application significantly increased the growth and yield of the high-Cd-accumulating cultivar(Puxing5).In the greenhouse experiment,lime and MX applications considerably decreased grain Cd concentration by 55％and 47％,respectively,for Puxing5 and by 24％and 26％,respectively,for the low-Cd-accumulating cultivar(Zhoumai30).In the field experiment,grain Cd concentration was significantly reduced by 68％and 72％by lime and MX applications,respectively,for Puxing5.Application of DSO also significantly reduced grain Cd concentration by 58％for Puxing5 and 25％for Zhoumai30 in the greenhouse experiment,but increased grain Cd concentration by 22％for Puxing5 in the field experiment.Our results implicate that laboratory incubation and greenhouse experiment results are necessary to be verified in field,and foliar Se application is recommended when considering both financial costs and production safety.

bioavailable Cd fractioncadmium contaminationfield plot experimentgrain Cd concentrationlaboratory incubationpot experiment

Qiqi LIU、Tianyi WU、Qiugang WU、Chen ZHANG、Dafu WU、Lihao ZHANG、Jing ZHOU、Huan ZHANG、Jun ZHOU

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School of Resources and Environment,Henan Institute of Science and Technology,Xinxiang 453003(China)

Key Laboratory of Soil Environment and Pollution Remediation,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008(China)

University of Chinese Academy of Sciences,Beijing 100049(China)

Jiangsu Design Institute of Geology for Mineral Resources,Xuzhou 221006(China)

National Engineering and Technology Research Center for Red Soil Improvement,Red Soil Ecological Experiment Station,Chinese Academy of Sciences,Yingtan 335211(China)

Sino-Japan Friendship Center for Environmental Protection,Beijing 100029(China)

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bioavailable Cd fraction cadmium contamination field plot experiment grain Cd concentration laboratory incubation pot experiment

2024

10.1016/j.pedsph.2023.07.010

土壤圈(英文版)
中国土壤学会,中科院南京土壤研究所和土壤与农业可持续发展国家重点实验室

土壤圈(英文版)

CSTPCD
影响因子：0.477
ISSN：1002-0160
年,卷(期)：2024.34(6)