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FERTILIZER SOURCES ON BERMUDAGRASS PASTURES FOR STOCKER GRAZING

FERTILIZER SOURCES ON BERMUDAGRASS PASTURES FOR STOCKER GRAZING. Hill Farm Research Station, Department of Agricultural Economics & Agribusiness, and Southeast Research Station. S. M. DeRouen, J. M. Gillespie, and J. D. Ward. Objective of the Study.

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FERTILIZER SOURCES ON BERMUDAGRASS PASTURES FOR STOCKER GRAZING

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  1. FERTILIZER SOURCES ON BERMUDAGRASS PASTURES FOR STOCKER GRAZING Hill Farm Research Station, Department of Agricultural Economics & Agribusiness, and Southeast Research Station S. M. DeRouen, J. M. Gillespie, and J. D. Ward

  2. Objective of the Study Determine effects of broiler litter and commercial fertilizer applied to bermudagrass pastures on: • 1) animal performance • 2) economic implications

  3. Experimental Procedures • Two-year study - conducted in 1999 and 2000 • 156 Angus-sired fall-born weaned crossbred calves were used: • 84 head in 1999; 72 head in 2000 • Stocking rate: 3.5 hd/acre in 1999; 3.0 hd/acre in 2000

  4. Experimental Procedures(Continued) • 121-day trial in 1999; 112-day trial in 2000 • Eight pastures were used; pasture was experimental unit • Monthly rising plate meter readings and forage clippings obtained

  5. Fertilizer Sources (Treatments) Evaluated • BL-2+2 - 2 tons/acre applied in early April & late June • BL-4- 4 tons/acre applied in early April & 50 lb/acre N applied in early July • CF-30 -250lb/acre of 17-17-17 (N-P-K) applied in mid-April, mid-May, & mid-June, & 50lb/acre of N applied in early July • CF-45 -250lb/acre of 17-17-17 (N-P-K) applied in mid-April, late May, & early July

  6. ACTUAL AMOUNT OF N-P-K BY FERTILIZER SOURCE

  7. ACTUAL AMOUNT OF N-P-K BY FERTILIZER SOURCE

  8. RELATIVE FORAGE AVAILABILITY-YR 1999

  9. RELATIVE FORAGE AVAILABILITY-YR 2000

  10. WEIGHT GAIN PERFORMANCE 6

  11. FERTILIZER COSTS 6

  12. NET RETURN/LOSS 6

  13. CONCLUSIONS • Similar weight gains for stockers were observed among pastures fertilized with either broiler litter or commercial fertilizer. • Fertilizer costs were reduced by 37 to 41 % with the use of broiler litter compared to commercial fertilizer. • At net economic loss resulted in 1999 by retaining calves and stockering over the summer, whereas, in 2000, a net economic return resulted except for one commercial fertilizer source.

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