Nitrogen Management for Optimum Winter Malting Barley Yield and Quality. (S04-petrie785586-poster)
Authors:
S.E. Petrie* - Oregon State University P. Hayes - Oregon State University K. Rhinhart - Oregon State University A. Corey - Oregon State University J. Kling - Oregon State University N. Blake - Oregon State University
Abstract:
Winter malting barley (Hordeum vulgare L.) is a potential alternative crop for dryland producers in the intermountain west. Excessively high or low grain protein levels will result in unacceptable malt quality.
The objectives of this research were to evaluate the effects of different nitrogen (N) management schemes on grain yield and protein and various malting quality characteristics. We seeded nine winter barley varieties in 2000 and seven winter barley varieties in 2001 at Pendleton, OR on a Walla Walla silt loam. Preplant soil test N totaled about 135 kg/ha in the upper 1.2 m of the soil each year. Pre-plant fall N was applied at 0, 56, 112, or 168 kg/ha as urea in 2000 and anhydrous ammonia in 2001 and spring N was applied as urea at either 0 or 56 kg/ha when the barley was in the four-leaf stage of development. The entire trial area received K2SO4 to supply K and S. Precipitation was near normal in crop year 2000-01 (420 mm) and less than normal in crop year 2001-02 (330 mm). Increasing
preplant N application rates increased plant height, grain yield, and protein and reduced test weight and plump kernels. The greatest yield resulted from the application of a total 112 to 168 kg N/ha in 2001 and 56 kg N/ha in 2002. Spring applied N increased grain protein but the magnitude of the increase was reduced at the higher rates of fall-applied N. There were significant differences among the varieties in their responses to N fertilizer.
Speaker Information: Steve Petrie, Oregon State University, CBARCP.O. Box 370, Pendleton, OR 97801; Phone: 541-278-4415; E-mail: [email protected]
Session Information: Monday, November 3, 2003, 4:00 PM-6:00 PM Presentation Start: 4:00 PM (Poster Board Number: 1317)
