کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4425499 1309106 2011 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of soil metal bioavailability estimates using two plant species (L. perenne and T. aestivum) grown in a range of agricultural soils treated with biosolids and metal salts
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Evaluation of soil metal bioavailability estimates using two plant species (L. perenne and T. aestivum) grown in a range of agricultural soils treated with biosolids and metal salts
چکیده انگلیسی

Few studies have quantified the accuracy of soil metal bioavailability assays using large datasets. A meta-analysis from experiments spanning 6 months to 13 years on 12 soil types, compared bioavailability estimate efficiencies for wheat and ryegrass. Treatments included biosolids ± metals, comparing total metal, Ca(NO3)2, EDTA, soil solution, DGT and free ion activity. The best correlations between soil metal bioavailability and shoot concentrations were for Ni using Ca(NO3)2 (r2 = 0.72) which also provided the best estimate of Zn bioavailability (r2 = 0.64). DGT provided the best estimate of Cd bioavailability, accounting for 49% of shoot Cd concentrations. There was no reliable descriptor of Cu bioavailability, with less than 35% of shoot Cu concentrations defined. Thus interpretation of data obtained from many soil metal bioavailability assays is unreliable and probably flawed, and there is little justification to look beyond Ca(NO3)2 for Ni and Zn, and DGT for Cd.


► A meta-analysis evaluated the efficacy of soil metal bioavailability assays.
► DGT could explain 49% of shoot Cd concentration.
► There is little justification to look beyond Ca(NO3)2 for Ni and Zn.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 159, Issue 6, June 2011, Pages 1523–1535
نویسندگان
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