Economie and phosphorus-related effects of precision feeding and forage management at a farm scale

L. T. Ghebremichael, P. E. Cerosaletti, Tameria L Veith, Clarence Alan Rotz, J. M. Hamlett, W. J. Gburekt

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Structural best management practices were implemented throughout the Cannonsville Reservoir Watershed (CRW) in an effort to reduce P losses to the reservoir. Yet long-term water quality control efforts within CRW are hindered by continuous P build-up in the soils resulting from dairy farm P imports exceeding exports. Addressing the P imbalance problems and maintaining economic viability of the farms requires a system-level redesign of farm management. One possible innovative strategy, precision feed management (PFM), reduces soil-P build-up by limiting feed and fertilizer purchases, and increasing high-quality homegrown forage production. This study applied the integrated farm system model (IFSM) to 2 CRW dairy farms to quantify the benefits of a PFM farm planning strategy in controlling P imbalance problems, and maintaining farm profitability and reducing off-farm P losses. The IFSM accurately simulated the 2 farms based on farm data supplied by farm planners; these scenarios were used as the baseline conditions. The IFSM simulations of more accurate feeding of P (based on P required in animal diets) integrated with increased productivity of grassforage and increased proportion of forage in the diet reduced the P imbalance of 1 farm from 5.3 to 0.5 kg/ ha and from 9.6 to 0.0 kg/ha for the second farm. For both farms, soluble P lost to the environment was reduced by 18%. Feed supplement purchases declined by 7.5 kg/cow per year for dietary mineral P, and by 1.04 and 1.29 t/cow per year for protein concentrates through adoption of the PFM system. Moreover, when a land management practice of converting corn to grass was coupled with the precision feeding of P and improved forage management, IFSM predicted reductions of 5.8 and 9.3 kg/ha of converted land sediment-bound P in erosion loss each year. The model predicted slight purchase increases in corn grain to offset reductions incornsilage production and feeding rates, but no appreciable change in the farm P balance due to land conversion. The model-based studies conducted on a farm-by-farm basis complement farm planning efforts in exploring innovative farming systems. Moreover, the results set a benchmark for potential benefits of PFM strategies, economically and environmentally.

Original languageEnglish (US)
Pages (from-to)3700-3715
Number of pages16
JournalJournal of Dairy Science
Volume90
Issue number8
DOIs
StatePublished - Jan 1 2007

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range management
Phosphorus
phosphorus
farms
farm planning
Farms
dairy farming
farm profitability
economic sustainability
Zea mays
cows
corn
protein concentrates
feed supplements
best management practices
forage production
Soil
farm management
soil management
dietary minerals

All Science Journal Classification (ASJC) codes

  • Food Science
  • Animal Science and Zoology
  • Genetics

Cite this

Ghebremichael, L. T., Cerosaletti, P. E., Veith, T. L., Rotz, C. A., Hamlett, J. M., & Gburekt, W. J. (2007). Economie and phosphorus-related effects of precision feeding and forage management at a farm scale. Journal of Dairy Science, 90(8), 3700-3715. https://doi.org/10.3168/jds.2006-836
Ghebremichael, L. T. ; Cerosaletti, P. E. ; Veith, Tameria L ; Rotz, Clarence Alan ; Hamlett, J. M. ; Gburekt, W. J. / Economie and phosphorus-related effects of precision feeding and forage management at a farm scale. In: Journal of Dairy Science. 2007 ; Vol. 90, No. 8. pp. 3700-3715.
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Ghebremichael, LT, Cerosaletti, PE, Veith, TL, Rotz, CA, Hamlett, JM & Gburekt, WJ 2007, 'Economie and phosphorus-related effects of precision feeding and forage management at a farm scale', Journal of Dairy Science, vol. 90, no. 8, pp. 3700-3715. https://doi.org/10.3168/jds.2006-836

Economie and phosphorus-related effects of precision feeding and forage management at a farm scale. / Ghebremichael, L. T.; Cerosaletti, P. E.; Veith, Tameria L; Rotz, Clarence Alan; Hamlett, J. M.; Gburekt, W. J.

In: Journal of Dairy Science, Vol. 90, No. 8, 01.01.2007, p. 3700-3715.

Research output: Contribution to journalArticle

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Ghebremichael LT, Cerosaletti PE, Veith TL, Rotz CA, Hamlett JM, Gburekt WJ. Economie and phosphorus-related effects of precision feeding and forage management at a farm scale. Journal of Dairy Science. 2007 Jan 1;90(8):3700-3715. https://doi.org/10.3168/jds.2006-836