Submitted to: Crop Management
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 9/16/2008
Publication Date: 9/25/2008
Citation: Castro, A., Petrie, S., Budde, A.D., Corey, A., Hayes, P., Kling, J., Rhinhart, K. 2008. Variety and N management effect on grain yield and quality of winter barley. Crop Management. Available: http://www.plantmanagementnetwork.org/pub/cm/research/2008/barley/.
Interpretive Summary: The effect of differing amounts of applied nitrogen fertilizer on winter barley yield and quality was examined. Protein levels and yield increased with increasing amounts of fertilizer. Advanced lines of malting winter barleys yielded almost as much as the feed varieties. Results of this research will allow growers in the Pacific Northwest the opportunity to maximize the yield and quality (profit) of winter barley and add to the diversity of crops being grown.
Technical Abstract: Winter malting barley is a potential alternative crop for the dryland region of the Pacific Northwest. Nitrogen fertilization can increase grain yield but may also increase lodging and grain protein and reduce test weight. The objectives of this research were to determine the effect of N application rate and timing on grain yield and quality of winter feed and malting barley varieties. Field trials were conducted at Pendleton, OR (17 inches annual precipitation) and Moro, OR (12 inches annual precipitation). Nitrogen was applied at 0, 50, 100, or 150 lb N per acre in the fall and at 0 or 50 lb N per acre in the spring at Pendleton and at 0, 30, 60, or 90 lb N per acre in the fall and at 0 or 30 lb N per acre in the spring at Moro. Nitrogen fertilization increased grain yields at Pendleton to a maximum of 5,800 lb/acre in 2001 and 5,200 lb/acre in 2002 and at Moro to a maximum of 3,000 lb/acre. Nitrogen fertilization increased grain protein and reduced test weights. Yields of the advanced lines of malting barley were about 90% of the yields of feed type barley varieties. Spring N applications did not increase grain yield or protein more than fall N applications.