2017 Volume 86 Issue 1 Pages 62-69
Common buckwheat is easy to shatter and yield loss often occurs. Therefore, we examined whether the use of a ‘shattering-resistant line’ is effective for reducing yield loss. Experiments were performed at the research field of Hokkaido Agricultural Research Center in Memuro town from 2012 to 2014, and in a buckwheat field in Hokuryu town in Hokkaido from 2013 to 2015. In the standard harvest at a suitable time with a combine harvester, the ‘threshing and sorting loss’ in the ‘shattering resistant line’ was greater than in “Kitawasesoba”, showing that the yield loss was greater in the former than in the latter. On the other hand, in a later harvest with the combine harvester, ‘head loss’ was greater but yield loss was smaller in the ‘shattering- resistant line’, than in “Kitawasesoba” because the ‘threshing and sorting loss’ was decreased in the ‘shattering-resistant line’ and the ‘pre-harvest shatter loss’ was extremely greater in “Kitawasesoba”. Furthermore, it was indicated that the use of the ‘shattering-resistant line’ was effective for reducing yield loss under the conditions where shattering occurs heavily, such as in rain, strong wind, and late and extremely late harvesting.
