Publication Date
1993
Description
Acremonium coenopliialium-infected tall fescue (Festuca arrundinacea Schreb.) is associated with animal health problems including reduced ,veight gains. Twelve 0.7 ha paddocks were used to study Kentucky- 31 tall fescue at low (LE=25%) or high (HE::58%) tiller endophyte (E) infection frequencies and fertilised with either 134 (LN) or 336, kg nitrogen/ha/year (HN) in a 22 factorial arrangement of treatments. Yearling Angus steers grazed under put-and-take management from April or May through late July or early August in each of nine years. In all except one year, ADG was lower (P<0.0769 to P<0.0018) on HE than LE. In 4 of 9 years, HN lowered (P<0.0821 to P<0.0003) ADG compared to LN. In only 2 of 9 years was there an NxE interaction (P<0,0537), the interactions expressing opposite effects when comparing the 2 years. In all but 3 years there was a linear (P<0.0606 to P<0.0019) relationship between endophyte infection rate and ADG. In only 1 of 9 years were quadratic effects significant (P<0.0407). Endophyte infestation consistently lowered steer AOG in a linear fashion with N effects less distinct,
Citation
Stuedemann, J A.; Wilkinson, S R.; Belesky, D P.; Thompson, F N.; Breedlove, D L.; Hildreth, D M.; Ciordia, H; Parks, A H.; Hoveland, C S.; and Huang, J, "Effect of Tiller Endophyte Infection Frequency and Nitrogen Fertilizer Rate of Tall Fescue on Steer Performance over Nine Seasons of Grazing" (2024). IGC Proceedings (1993-2023). 9.
https://uknowledge.uky.edu/igc/1993/session39/9
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Effect of Tiller Endophyte Infection Frequency and Nitrogen Fertilizer Rate of Tall Fescue on Steer Performance over Nine Seasons of Grazing
Acremonium coenopliialium-infected tall fescue (Festuca arrundinacea Schreb.) is associated with animal health problems including reduced ,veight gains. Twelve 0.7 ha paddocks were used to study Kentucky- 31 tall fescue at low (LE=25%) or high (HE::58%) tiller endophyte (E) infection frequencies and fertilised with either 134 (LN) or 336, kg nitrogen/ha/year (HN) in a 22 factorial arrangement of treatments. Yearling Angus steers grazed under put-and-take management from April or May through late July or early August in each of nine years. In all except one year, ADG was lower (P<0.0769 to P<0.0018) on HE than LE. In 4 of 9 years, HN lowered (P<0.0821 to P<0.0003) ADG compared to LN. In only 2 of 9 years was there an NxE interaction (P<0,0537), the interactions expressing opposite effects when comparing the 2 years. In all but 3 years there was a linear (P<0.0606 to P<0.0019) relationship between endophyte infection rate and ADG. In only 1 of 9 years were quadratic effects significant (P<0.0407). Endophyte infestation consistently lowered steer AOG in a linear fashion with N effects less distinct,
