Suppressive effects of magnesium oxide materials on cadmium uptake and accumulation into rice grains II: Suppression of cadmium uptake and accumulation into rice grains due to application of magnesium oxide materials.
作者： Tetsuro Kikuchi , Masanori Okazaki , Sonoko Dorothea Kimura , Takashi Motobayashi , Jamsranjav Baasansuren
DOI: 10.1016/J.JHAZMAT.2007.10.025
关键词: Poaceae 、 Soil conditioner 、 Brown rice 、 Soil pH 、 Environmental chemistry 、 Oryza sativa 、 Agronomy 、 Cadmium 、 Paddy field 、 Magnesium 、 Chemistry
摘要: Abstract The objective of this study is to assess the applicability a commercial magnesium oxide (MgO) and composite material containing MgO natural minerals (‘MgO-SH-A’) as soil amendments for suppression cadmium (Cd) uptake accumulation into rice grains. A cultivation experiment plants ( Oryza sativa L. cv. Kinuhikari) was conducted in an actual Cd-contaminated alluvial paddy field evaluate effectiveness these materials. ‘plant available’ fractions Cd significantly decreased by application at 2250 kg ha −1 or MgO-SH-A 4500 kg ha . These decreases would be primarily attributed increase pH due applications materials because were negatively correlated with pH. Even under suppressive condition plants, i.e., continuous flooding around heading stage, further reduced concentration brown compared that from control. It concluded two examined effective preventing contamination grains grown Cd-polluted fields.
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