Nitrogen Application Method for High Quality and Labor Saving in Rice Production under Amended Standard N Application Level
2010
Lee, C.K., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Kim, J.H., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Choi, M.K., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Kwak, K.S., Rural Development Administration, Suwon, Republic of Korea | Shin, J.C., National Institute of Crop Science, RDA, Suwon, Republic of Korea
In Korea, standard N application level was amended from 110 to 90kg per ha for high quality rice production in 2005. So far, N application method, however, has not been considered for yield and quality based on changed standard N application level. Therefore, this experiment was conducted to find out more efficient N application method for improving rice quality or labor saving under the amended standard N application level with several varieties at three site (Suwon, Iksan, and Milyang) for two years from 2005 to 2006. Top dressing of N at 15 days before heading compared to the standard (25 days before heading) showed improved rice qualities such as 1000 grain weight and head rice ratio without changing rice yield and protein content of brown rice. In addition, there were no significant differences in yield and quality between different N split application of 70-0-30% and 50-30-20%, indicating that the former would be useful for labor saving without yield decrease and quality deterioration.
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