Publication Date
1985
Location
Kyoto Japan
Description
Tall fescue (Fescuca arundinacea) toxicosis has been associated with 'increased levels of fungal endophyte (Acremonium coenophialum) and increased rates of nitrogen (N) fertilization. This study determines the performance of steers grazing a 2 factorial of Kentucky-31 tall fescue at low fungus (LF) and high fungus (HF) levels at both 134 (LN) and 336 kg N·ha-1• 2 yC1 (HN) as well as steer performance on two new LF tall fescue cultivars, AU-Triumph and Johnstone fertilized at the LN rate. Eighteen 0.7 ha paddocks were used in a randomized block design with three blocks of the six treatments. Paddocks were stocked with yearling Angus steers under put-and -take grazing management in 1983 and 1984. Steer performance reflected greater differences among treatments in 1984 than 1983. There was a significant level of fungus x N rate interaction in average daily gain (ADG). There was a greater depression in ADG with increased fungal level at LN than at HN fertilization. The lowest ADG's were observed on the HF, LN KY-31 treatment. Fungal level did not influence beef production· ha-1, but increased N fertilization did increase beef production· ha-1. At the LN fertilization rate, ADG and beef production·ha-1 of steers grazing Johnstone and AU-Triumph were equal to, or superior to, that of KY-31.
Citation
Stuedmann, J A.; Wilkinson, S R.; Belesky, D P.; Hoveland, C S.; Devine, O J.; Breedlove, D L.; Ciordia, H; and Thompson, F N., "Effect of Cultivar, Level of Fungal Endophyte (Acremonium coenophialum) and Nitrogen Fertilization of Tall Fescue (Festuca arundinacea) on Steer Performance" (1985). IGC Proceedings (1985-2023). 41.
(URL: https://uknowledge.uky.edu/igc/1985/ses11/41)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Effect of Cultivar, Level of Fungal Endophyte (Acremonium coenophialum) and Nitrogen Fertilization of Tall Fescue (Festuca arundinacea) on Steer Performance
Kyoto Japan
Tall fescue (Fescuca arundinacea) toxicosis has been associated with 'increased levels of fungal endophyte (Acremonium coenophialum) and increased rates of nitrogen (N) fertilization. This study determines the performance of steers grazing a 2 factorial of Kentucky-31 tall fescue at low fungus (LF) and high fungus (HF) levels at both 134 (LN) and 336 kg N·ha-1• 2 yC1 (HN) as well as steer performance on two new LF tall fescue cultivars, AU-Triumph and Johnstone fertilized at the LN rate. Eighteen 0.7 ha paddocks were used in a randomized block design with three blocks of the six treatments. Paddocks were stocked with yearling Angus steers under put-and -take grazing management in 1983 and 1984. Steer performance reflected greater differences among treatments in 1984 than 1983. There was a significant level of fungus x N rate interaction in average daily gain (ADG). There was a greater depression in ADG with increased fungal level at LN than at HN fertilization. The lowest ADG's were observed on the HF, LN KY-31 treatment. Fungal level did not influence beef production· ha-1, but increased N fertilization did increase beef production· ha-1. At the LN fertilization rate, ADG and beef production·ha-1 of steers grazing Johnstone and AU-Triumph were equal to, or superior to, that of KY-31.
