Forage quantity and quality of Kentucky bluegrass do not meet beef cow-calf pairs nutritional recommendations

Authors: Toledo, David; Christensen, Rachael; MEEHAN, MIRANDA - North Dakota State University; DAHLEN, CARL - North Dakota State University; SWANSON, KENDALL - North Dakota State University

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 1/25/2023
Publication Date: 1/25/2023
Citation: Toledo, D.N., Christensen, R., Meehan, M., Dahlen, C., Swanson, K. 2023. Forage quantity and quality of Kentucky bluegrass do not meet beef cow-calf pairs nutritional recommendations. Meeting Abstract. 1.

Interpretive Summary:

Technical Abstract: Grasslands in the northern Great Plains have been invaded by Kentucky bluegrass (Poa pratensis L.), which is a cool-season grass. The extent of invasion varies from non-invasion to areas completely invaded. Future weather predictions estimate that growing season precipitation will decrease while the temperature will increase. These weather patterns will affect grass growth and forage quality, especially in areas that are fully invaded. We compared the nutritional requirements of cow-calf pairs to the productivity and nutritional quality of Kentucky bluegrass in drought and non-drought years. Kentucky bluegrass samples were clipped every two to three weeks in mowed and unmowed plots during the growing seasons of 2017, a drought year, and of 2018. Samples were used to determine annual production and were analyzed for minerals and for crude protein using wet chemistry methods and in vitro true dry matter digestibility. We found productivity and nutritional deficiencies throughout the growing season, especially during a drought year. Increasing forage plant diversity and adjusting management to allow adequate growth and plant cover throughout the year can ensure a more consistent supply of forage.