Sulfur Uptake by Corn as Influenced by Ammonium and Nitrate Nitrogen1
- G. W. Rehm and
- A. C. Caldwell2
The effect of NH4 and NO3 ions on S uptake by corn (Zea mays L.) from a starter fertilizer was studied with the use of 15N and 35S. When both the N and S were applied as a starter, the uptake of fertilizer S was significantly increased when NH4 instead of NO3 was used as the N source. This effect was observed in young plants through 4 weeks of age. More N was absorbed by the corn plant when NH4 rather than NO3 was supplied as the N source. The N source, however, had no significant effect on the total S, SO4-S or total N content of the tissue and the corn yield.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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