2023 Volume 92 Issue 1 Pages 48-54
Reduced basal fertilizer and increased additional fertilizer application have been reported to increase barley yield in some regions, but not in the Kanto region. We conducted a two-year trial to clarify the effects of this fertilization system in the Kanto region. Fertilizer was added at different growth stages to the six-row barley cultivars ‘Shunrai’ (a pearling and barley tea variety) and ‘Kashimagoal’ (a barley tea variety) and the amount of N (g m-2) was 6 (as basal fertilizer) –0 (at tillering stage) –3 (at jointing stage), 3–0–6, 6–0–6, and 3–3–6 in ‘Shunrai’, 6–0–6 and 3–3–6 in ‘Kashimagoal’. Compared to the 6–0–3, the 3–3–6 tended to be higher number of ears and yield in ‘Shunrai’. Furthermore, the protein content and glassy grain rate of the grain were higher in the plot with more N in the jointing fertilization, indicating the possibility of quality problems for pearling. The number of grains and yield of ‘Kashimagoal’ tended to be higher in the 3–3–6 system, than in the 6–0–6 system, and there was no difference in the protein content of grains. This study indicated that the 3–3–6 fertilizer system with a high ratio of additional fertilizer to basal fertilizer in the Kanto region increases the yield of six-row barley cultivars and is particularly suitable for barley tea.
