Film Mulching Redistributes Soil Aggregates and Promotes Cadmium Availability and Phytoremediation Potential of Helianthus annuus Linn

Film mulching (FM) is commonly used in agricultural production, but whether it affects soil cadmium (Cd) availability and accumulation in oil sunflower has not been fully examined. Therefore, the effects of FM and non-FM treatments on those factors were investigated in a field experiment. Compared w...

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Bibliographic Details
Published in:ACS agricultural science & technology 2022-04, Vol.2 (2), p.381-390
Main Authors: Hu, Shengnan, Chen, Linhan, Yang, Wenjun, Tang, Yunpeng, Ma, Qiao, Zeng, Qingru
Format: Article
Language:English
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Summary:Film mulching (FM) is commonly used in agricultural production, but whether it affects soil cadmium (Cd) availability and accumulation in oil sunflower has not been fully examined. Therefore, the effects of FM and non-FM treatments on those factors were investigated in a field experiment. Compared with nonfilm mulching (NFM) treatment, FM significantly increased oil sunflower root biomass by 49.5% and stem biomass by 62.8%. Film mulching also increased Cd concentrations in roots by 87.6%, stems by 258.9%, leaves by 236.5%, flower disks by 71.3%, shucks by 26.5%, and grains by 160.0%. Film mulching reduced soil pH (0.38 units) and organic matter content (26.4%) and increased available Cd concentration (23%). In FM, the grain size fraction (GSF) of macro-aggregates increased but that of micro-aggregates decreased. Film mulching also increased mean weight diameter (18%), geometric mean diameter (48%), and percentage of aggregates >0.25 mm (36.2%) under wet sieving, thereby promoting soil aggregate stability and resistance to erosion and farming practices.
ISSN:2692-1952
2692-1952
DOI:10.1021/acsagscitech.1c00286