Evaluation of Cultivar and Nitrogen Management Options for Malting Barley1
- G. E. Varvel and
- R. K. Severson2
Malting barley (Hordeum vulgare L.) requires constant evaluation of N management practices for individual cultivars because applied N directly affects both yield and malting properties. Knifed-in versus broadcast applications of 0, 56, 112, and 168 kg N ha−1 were compared on Morex and Glenn cultivars in field experiments during 1981, 1982, and 1983 on a Hegne silty clay loam soil (fine, frigid Typic Calciaquolls). An additional cultivar, Robust, was added during 1983. Early plant, forage, and grain N concentrations, forage and grain yields, and percent plump kernels were measured. Cultivar and N rate main effects explained most differences in yield and malting quality after significant cultivar ✕ year, and N rate ✕ year interactions were found to be caused by differences in initial NO3-N levels. Method of N application was not significant. Grain N concentrations never exceeded 21.6 g kg−1, a maximum set by the malting industry, during the 3 yr. On the basis of grain yields and percent plump kernels, Glenn was superior to Morex overall, but in 1983, Robust surpassed both Glenn and Morex at all levels of applied N. Each cultivar attained high yield levels and maintained malting quality with careful N management.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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