Abstract：
:Paddy fields are characterized by frequent organic input (e.g., fertilization and rice residue amendment), which may affect mercury biogeochemistry and bioaccumulation. To explore potential effects of rice residue amendment on methylmercury (MMHg) accumulation in rice, a mercury-contaminated paddy soil was amended with rice root (RR), rice straw (RS) or composted rice straw (CS), and planted with rice. Incorporating RS or CS increased grain MMHg concentration by 14% or 11%. The observed increases could be attributed to the elevated porewater MMHg levels and thus enhanced MMHg uptake by plants, as well as increased MMHg translocation to grain within plants. Our results indicated for the first time that rice residue amendment could significantly affect MMHg accumulation in rice grain, which should be considered in risk assessment of MMHg in contaminated areas.
journal_name
Chemospherejournal_title
Chemosphereauthors
Zhu H,Zhong H,Wu Jdoi
10.1016/j.chemosphere.2016.02.095subject
Has Abstractpub_date
2016-06-01 00:00:00pages
259-64eissn
0045-6535issn
1879-1298pii
S0045-6535(16)30256-9journal_volume
152pub_type
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