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Mitigating cadmium accumulation in greenhouse lettuce production using biochar.
Environ Sci Pollut Res Int. 2017 Mar; 24(7):6532-6542.ES

Abstract

Greenhouse experiments were conducted to investigate the influence of rice straw biochar (RSB) on soil cadmium (Cd) availability and accumulation in lettuce. The RSB was applied either in bands or broadcast in the test site of four greenhouses with soil Cd concentrations ranging from 1.70-3.14 μg g-1. Biochar doses applied in bands were half of those broadcast. The Cd levels in the shoots of lettuce were observed to be reduced by up to 57% with increasing RSB application rate (0, 6, 12, 18 t ha-1). Following RSB application, shoot Cd concentrations of lettuce were reduced to below the Chinese threshold value set for food, and hazard quotients for Cd associated with vegetable consumption were reduced from 0.70-1.11 to 0.42-0.65. A decrease in soil bulk density (11%) and increases in water holding capacity (16%), available phosphorus (30%), available potassium (197%), and lettuce yield (15%) were observed after RSB application. Multiple linear regression analysis suggested that the soil extractable Cd level (but not biomass dilution) and soil bulk density, as influenced by RSB addition, were the dominant contributors to the shoot Cd levels in lettuce and lettuce yield, respectively. These results highlight the potential for RSB to mitigate the phytoaccumulation of Cd and thereby to reduce human exposure from vegetable consumption. Application of biochar in band, rather than broadcasting over the entire area, represents an opportunity to halve the biochar cost while retaining a good remediation effect.

Authors+Show Affiliations

Research and Development Center for Grasses and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China.State Key Lab of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People's Republic of China.Research and Development Center for Grasses and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China.School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.State Key Laboratory of Soil and Sustainable Agriculture, Jiangsu Biochar Engineering Center, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, People's Republic of China.Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, AB24 3UU, UK.Research and Development Center for Grasses and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100097, People's Republic of China. qinghaiw@sina.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28074369

Citation

Zheng, Ruilun, et al. "Mitigating Cadmium Accumulation in Greenhouse Lettuce Production Using Biochar." Environmental Science and Pollution Research International, vol. 24, no. 7, 2017, pp. 6532-6542.
Zheng R, Sun G, Li C, et al. Mitigating cadmium accumulation in greenhouse lettuce production using biochar. Environ Sci Pollut Res Int. 2017;24(7):6532-6542.
Zheng, R., Sun, G., Li, C., Reid, B. J., Xie, Z., Zhang, B., & Wang, Q. (2017). Mitigating cadmium accumulation in greenhouse lettuce production using biochar. Environmental Science and Pollution Research International, 24(7), 6532-6542. https://doi.org/10.1007/s11356-016-8282-9
Zheng R, et al. Mitigating Cadmium Accumulation in Greenhouse Lettuce Production Using Biochar. Environ Sci Pollut Res Int. 2017;24(7):6532-6542. PubMed PMID: 28074369.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mitigating cadmium accumulation in greenhouse lettuce production using biochar. AU - Zheng,Ruilun, AU - Sun,Guoxin, AU - Li,Cui, AU - Reid,Brian J, AU - Xie,Zubin, AU - Zhang,Bo, AU - Wang,Qinghai, Y1 - 2017/01/10/ PY - 2016/05/04/received PY - 2016/12/18/accepted PY - 2017/1/12/pubmed PY - 2017/6/7/medline PY - 2017/1/12/entrez KW - Biochar KW - Cadmium KW - Greenhouse KW - Hazard quotient KW - Leaf lettuce SP - 6532 EP - 6542 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 24 IS - 7 N2 - Greenhouse experiments were conducted to investigate the influence of rice straw biochar (RSB) on soil cadmium (Cd) availability and accumulation in lettuce. The RSB was applied either in bands or broadcast in the test site of four greenhouses with soil Cd concentrations ranging from 1.70-3.14 μg g-1. Biochar doses applied in bands were half of those broadcast. The Cd levels in the shoots of lettuce were observed to be reduced by up to 57% with increasing RSB application rate (0, 6, 12, 18 t ha-1). Following RSB application, shoot Cd concentrations of lettuce were reduced to below the Chinese threshold value set for food, and hazard quotients for Cd associated with vegetable consumption were reduced from 0.70-1.11 to 0.42-0.65. A decrease in soil bulk density (11%) and increases in water holding capacity (16%), available phosphorus (30%), available potassium (197%), and lettuce yield (15%) were observed after RSB application. Multiple linear regression analysis suggested that the soil extractable Cd level (but not biomass dilution) and soil bulk density, as influenced by RSB addition, were the dominant contributors to the shoot Cd levels in lettuce and lettuce yield, respectively. These results highlight the potential for RSB to mitigate the phytoaccumulation of Cd and thereby to reduce human exposure from vegetable consumption. Application of biochar in band, rather than broadcasting over the entire area, represents an opportunity to halve the biochar cost while retaining a good remediation effect. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/28074369/Mitigating_cadmium_accumulation_in_greenhouse_lettuce_production_using_biochar_ L2 - https://dx.doi.org/10.1007/s11356-016-8282-9 DB - PRIME DP - Unbound Medicine ER -