Offered Papers Theme A: Efficient Production from Grassland
Description
When grazing ruminants consume forages high in Mo but adequate in S, there is a risk of molybdenosis (a Mo-induced Cu deficiency). This occurs when Mo, S, and Cu join to form Cu-thiomolybdate complexes in the rumen that are not readily absorbed (Suttle, 1991). High dietary S reduces Cu absorption, possibly due to unabsorbable Cu sulphide formation, independent from its part in thiomolybdate complexes. The use of municipal sludge (biosolids) as a pasture fertiliser is of interest since some contain high Mo which may induce Cu deficiency. The objective of this study was to evaluate the performance and Cu status of cattle grazing pastures fertilized with biosolids.
Citation
Tiffany, M. E.; McDowell, L. R.; O'Connor, G. A.; and Wilkinson, N. S., "Effect of Applied Biosolids to Bahiagrass Pastures on Copper Status of Cattle" (2023). IGC Proceedings (1993-2023). 115.
https://uknowledge.uky.edu/igc/20/themeA/115
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Effect of Applied Biosolids to Bahiagrass Pastures on Copper Status of Cattle
When grazing ruminants consume forages high in Mo but adequate in S, there is a risk of molybdenosis (a Mo-induced Cu deficiency). This occurs when Mo, S, and Cu join to form Cu-thiomolybdate complexes in the rumen that are not readily absorbed (Suttle, 1991). High dietary S reduces Cu absorption, possibly due to unabsorbable Cu sulphide formation, independent from its part in thiomolybdate complexes. The use of municipal sludge (biosolids) as a pasture fertiliser is of interest since some contain high Mo which may induce Cu deficiency. The objective of this study was to evaluate the performance and Cu status of cattle grazing pastures fertilized with biosolids.
