Effects of top dressing time on agronomic performance on early seedings of malting barley [Hordeum vulgare] cultivar 'Shunrei'
2008
Tsukazaki, M.(Fukuoka-ken. Agricultural Research Center, Chikushino (Japan)) | Yamaguchi, O. | Uchimura, Y. | Baba, T. | Takata, K. | Furusho, M.
We compared the agronomic performance by four topdressing times between the beginning of January and the middle of February on early seeding in the middle of November, for the purpose of defining the proper time of topdressing application on malting barley 'Shunrei'. The results show that effects of the differences in time of topdressing application on agronomic performance were different by the incipient growth (stem number till the beginning of January) of the barley. In 2004 the incipient growth was thick, the ear number increased, and the outward appearance was superior by early topdressing. The yield on the latest topdressing (the middle of February) tended to decrease. In comparison, in 2005 the incipient growth was not thick, the ear number and yield on the earliest topdressing (the beginning of January) tended to decrease, and the outward appearance was inferior. With regard to the malting quality, there was no difference in the time of topdressing application throughout the two years. These results show that it is important to top-dress between the beginning of January and the beginning of February and to avoid topdressing in the middle of February, if incipient growth is thick. On the other hand, if incipient growth is not thick, it is important to top-dress from the last ten days of January to the middle of February, and to avoid topdressing in the beginning of January.
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