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Rye Seeded for Grain in Coastal Bermudagrass¹

A 3-year study compared rye (Secale cereale L.) grain and ‘Coastal’ bermudagrass (Cynodon dactylon L.) forage yields with cropping systems of Coastal only, rye only (conventional seedbed), and Coastal-rye (rye seeded in Coastal). Five rates of N were added for rye and two rates of N were added for Coastal.

Sod-seeded rye yielded as well as conventionally seeded rye. First-harvest Coastal yields were lower with Coastalrye than with Coastal only. This reduction in Coastal yield increased as the rates of N added for rye increased. Annual Coastal yields, averaged over all rates of N added for rye, were as high with Coastal-rye as with Coastal only for 2 of the 3 years.

Light intensity, soil water, and soil temperature were lower with a high rate of N added for rye than with a low rate. All of these factors probably contributed to the low first-harvest Coastal yield, but shading of Coastal by the rye grain crop is suggested as the dominant factor.

Key Words: rye • Coastal bermudagrass • sodseeding • nitrogen • sunlight • erosion

² Formerly Research Scientist, now Associate Professor of Soil Fertility, Department of Agronomy, University of Illinois, Urbana; Research Soil Scientist and Agricultural Research Technician, USDA. Southern Piedmont Conservation Research Center, Watkinsville, Ga.

Received for publication April 3, 1967.

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