Abstract
ABSTRACT A 3-year study was conducted to investigate the major nutrient dynamics in soil receiving swine effluent as the sole source of plant nutrients for warm-season perennial bermudagrass and cool-season annuals. Berseem and crimson clovers, ryegrass, and wheat were seeded in common bermudagrass for a year-round nutrient uptake and spring through summer haying. Bermudagrass dry matter of 9.0 mg ha−1 (3-yr average) was not impacted by the overseeding treatments. Most of the soil nutrient element concentrations increased during the study, particularly phosphorus in top 5 cm of the soil surface. The increase of Fe and NO3-N concentration at the 0-5 cm depth was high. Double cropping can be a better practice than growing bermudagrass alone, but, the effluent nutrient application must be coordinated with the nutrient requirements of the growing forages in order to minimize the build up of any nutrient in the soil.
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