文档介绍：Advances in Environmental Research 4Ž. 2000 347᎐355
Trace metal concentration in durum wheat from
application of sewage sludge mercial fertilizer
Heather L. Frosta, Lloyd H. Ketchum ,U
aDepartment of Ci¨il Engineering and Geological Sciences, Uni¨ersity of Notre Dame, Notre Dame, IN 46556, USA
Accepted 10 July 2000
Abstract
Repetitive application mercial fertilizer continually introduces potentially toxic trace metals to the soil. Such
metallic elements are not biodegradable, accumulate in the soil, and are subsequently taken up by food crops.
Sewage sludge, often disposed of in landfills, contains high nutrient anic contents and is now being recycled
and beneficially applied to agricultural land worldwide in increasing amounts. Metals in sewage sludge are generally
organically bound and generally less available for plant uptake than the more mobile metal salt impurities found in
commercial fertilizers. The purpose of this project was to determine the regions of metal accumulation within the
wheat plant and pare metal uptake by plants receiving a high metal load through the application of
contaminated sewage sludge with that by plants receiving mercial fertilizer and a metal-free control. Results of
this research indicate that despite the high metal load received by the sludge-applied replicates, metal concentrations
in those plants were similar to the c