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À propos de : Ionic Thiocyanate (SCN−) Production, Fate, and Phytotoxicity in Soil Amended with Brassicaceae Seed Meals        

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  • Ionic Thiocyanate (SCN−) Production, Fate, and Phytotoxicity in Soil Amended with Brassicaceae Seed Meals
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  • Brassicaceae seed meals produce ionic thiocyanate (SCN−), a bioherbicidal compound. This study determined the fate of SCN− in a field soil amended with seed meals of Sinapis alba, Brassica juncea, and Brassica napus and quantified crop phytotoxicity by monitoring carrot (Daucus carota) emergence. Meals were applied at 1 or 2 t ha−1, and soils were sampled to 35 cm for SCN−. Maximum SCN− (211 µmol kg−1 of soil) was measured at 5 days in 0−5 cm samples from plots amended with S. alba meal at 2 t ha−1. Less than 30 µmol of SCN− kg−1 of soil was measured at soil depths below 15 cm. At 44 days, SCN− was <15 µmol kg−1 of soil in all treatments. Emergence inhibition of carrots seeded 15−36 days after meal amendment was found only in S. alba treatments. The rapid decrease of SCN− concentrations in Brassicaceae meal-amended soil indicates limited potential for off-site environmental impacts.
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  • SCN− Production from Brassicaceae Meals
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