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Published online 1 May 2008
Published in J Environ Qual 37:772-779 (2008)
DOI: 10.2134/jeq2007.0157
© 2008 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Soil Sulfur Amendments Suppress Selenium Uptake by Alfalfa and Western Wheatgrass

C. L. Mackowiaka,* and M. C. Amacherb

a Univ. of Florida, North Florida Research and Education Center, 155 Research Dr., Quincy FL 32351-5677
b USDA-FS Rocky Mountain Research Station, Forestry Sciences Lab., 860 N 1200 E, Logan UT 84321


Figure 1
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  		Fig. 1. Effect of four rates (0, 0.5, 1, and 2 Mg S ha–1) of elemental S and gypsum on aboveground biomass of P. smithii at 51, 86, 110, 135, 166, 197, and 226 d after planting. Symbols represent the means from 4 pots ± standard errors.

 

Figure 2
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  		Fig. 2. Effect of four rates (0, 0.5, 1, and 2 Mg S ha–1) of elemental S and gypsum on aboveground biomass of M. sativa at 51, 86, 110, 135, 166, 197, and 226 d after planting. Symbols represent the means from 4 pots ± standard errors.

 

Figure 3
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  		Fig. 3. Effect of four rates (0, 0.5, 1, and 2 Mg S ha–1) of elemental S and gypsum on Se concentrations in P. smithii at 51, 86, 110, 135, 166, 197, and 226 d after planting. Symbols represent the means from 4 pots ± standard errors.

 

Figure 4
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  		Fig. 4. Effect of four rates (0, 0.5, 1, and 2 Mg S ha–1) of elemental S and gypsum on Se concentrations in M. sativa at 51, 86, 110, 135, 166, 197, and 226 d after planting. Symbols represent the means from 4 pots ± standard errors.

 

Figure 5
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  		Fig. 5. Effect of seven clippings of P. smithii and M. sativa on soil saturation and oxalate-extractable Se in shale/soil mixtures with or without plants. Symbols for the planted treatments represent the means from 8 pots ± standard errors. Symbols for the unplanted treatments represent the means from 2 pots ± standard errors. Linear regressions at P ≤ 0.10 are provided in the legends.

 




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