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Growth and Uptake of Selenium by Swiss Chard in Acid and Neutral Soils

Dep. of Soil and Environ. Sci,, Univ. of California, Riverside, CA 92521-0424.

^* Corresponding author.

ABSTRACT

The absorption of Se by plants in acid and neutral soils in relation to the concentration and chemical form of Se added was studied. Selenate-Se added to an acid soil in amounts equal to or greater than 1.0 mg kg^–1 significantly reduced yields of Swiss chard (Beta vulgaris L. var. cicla). Selenite-Se, however, added to the acid soil at levels up to 2 mg kg^–1 did not affect yields. Likewise, yields were also unaffected when selenite or selenate was added alone or in combination to a neutral soil at levels up to 2 mg Se kg^–1. Amounts of Se absorbed by plants from soils where selenate was added were greater than where selenite was added. Selenate added to the soils was, in part, reduced to selenite during the growth period.

Key Words: Beta vulgaris L. • Selenate • Selenite • Soil pH

Contribution of the Dep. of Soil and Environ. Sci., Univ. of California, Riverside.

Received for publication May 26, 1987.