Fluctuations of agrononic characters and brewing qualities of "Takaho-Golden" and "Mikamo-Golden" [Hordeum vulgare] against variations of fertilizer application and seeding rate
1999
Sotome, T. (Tochigi-ken. Agricultural Experiment Station, Utsunomiya (Japan)) | Sato, K. | Kawada, N. | Saotome, K. | Fukuda, E.
Investigation was made into the fluctuation characteristics of main agronomic characters and main brewing qualities against variations in the volume of fertilizer (nitrogenous fertilizer) application and seeding rate, about "Takaho-Golden" and "Mikamo-Golden". With Takaho-Golden, it became clear that the crude protein content is liable to fluctuate and that the brewing qualities such as malt extract, etc. remarkably drop with an increase of crude protein content. Moreover, while increase in the fertilizer application leads to an increase in the yield, the crude protein contents exceeds 11.5% at a fertilizer application of approximately 0.9 kg/a or over, the malt extract comes to no less than 83% with a fertilizer application of approximately 0.7 kg/a or under, the number of ears decreases and the yield drops and the malt extract is liable to decrease with a small fertilizer application. From such facts, it was estimated that a fertilizer application under the middle level of the fertilizer application for Takaho-Golden and that for Mikamo-Golden and a seeding rate about equal to that of Takaho-Golden are optimal for the culture of Takaho-Golden. On the other hand, Mikamo-Golden was confirmed to have such characteristics as easily variable plump yield, low yield and low 1000-grain weight. Furthermore, judging from the facts that the crude protein contents is liable to increase with an increase of fertilizer application and that the 1000-grain weight increases with a drop of seeding rate, it was believed important to keep fertilizer application and seeding rate no higher than the current level. In addition, removal of powdery mildew was also believed necessary as an increase of powdery mildew caused drop of plump weight and 1000-grain weight
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