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Lead Uptake by Lettuce and Oats as Affected by Lime, Nitrogen, and Sources of Lead¹

ABSTRACT

Uptake of lead by lettuce (Lactuca sativa L.) and oats (Avena sativa L.) as a result of application of lime, nitrogen, and various sources of lead to the soil was studied in a growth chamber experiment. Soil application of lead increased the uptake of lead by lettuce to a greater degree than by oats. Application of lime repressed the uptake of added lead by both plants, while application of low levels of nitrogen reduced the uptake of lead by lettuce and oat roots only. Application of lead chloride lowered the amount of sulfur and phosphorus in plants, but levels of other elements studied were not affected by any lead treatment.

Key Words: heavy metal • Lactuca sativa • Avena sativa

¹ Contribution from the Canada Department of Agriculture, Research Branch, Agassiz, B. C., Canada.

² Research Scientist and Technician, respectively.

Received for publication May 28, 1971.