Effect of Phosphorus Application on Eggplant Cadmium Accumulation and Soil Cadmium Morphology

Qinghui Meng, Wenhua Fan (), Fenwu Liu, Gailing Wang and Xiaoying Di
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Qinghui Meng: College of Resources and Environment, Shanxi Agricultural University, Jinzhong 030801, China
Wenhua Fan: College of Resources and Environment, Shanxi Agricultural University, Jinzhong 030801, China
Fenwu Liu: College of Resources and Environment, Shanxi Agricultural University, Jinzhong 030801, China
Gailing Wang: College of Resources and Environment, Shanxi Agricultural University, Jinzhong 030801, China
Xiaoying Di: College of Resources and Environment, Shanxi Agricultural University, Jinzhong 030801, China

Sustainability, 2023, vol. 15, issue 23, 1-16

Abstract: Soil cadmium (Cd) contamination affects human health, and the application of phosphorus (P) fertilizer can inhibit the toxic effects of Cd; however, the effects of different P fertilizers on Cd accumulation in calcareous soils are unknown. To address this point, this paper used a pot experiment with four P fertilizer types (monoammonium phosphate (MAP), superphosphate (SSP), diammonium phosphate (DAP), and dicalcium phosphate (DCP)) and four P fertilizer levels (0, 0.15, 0.25, and 0.35 g kg −1 , P per kg of soil). The effects of P application on the biomass of eggplant, Cd content, bioconcentration factors, translocation factor, yield quality, and soil Cd morphology changes in a Cd-contaminated environment were explored. Applying 0.35 g kg −1 of DCP significantly increased eggplant biomass while reducing Cd accumulation, concentration, and transport within eggplants under Cd contamination. The P fertilizer changed the distribution of soil Cd morphology. A redundancy analysis identified Cd content in the residual and Fe/Mn oxides-bound states as the primary factors influencing Cd levels in plants. In summary, the application of 0.35 g kg −1 DCP proved most efficient in mitigating Cd accumulation in eggplants under Cd-induced stress conditions.

Keywords: cadmium contamination; phosphate fertilizer; eggplant; cadmium content; soil cadmium morphology (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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