Long term storage method of beech (Fagus crenata Bl.) nuts under low temperature after drying
1997
Koyama, H. (Hokkaido. Forest Experiment Station, Bibai (Japan)) | Terazawa, K. | Yasaka, M.
Four different kinds of treatments, i.e. i) drying, ii) coating with sodium alginate, iii) drying after prechilling and iv) non-treatment as control, were applied to nuts of beech before storage in order to examine which of these is the most appropriate for long term storage without deterioration. The nuts were stored at 2 degrees C and 40% relative humidity. Non. reatment nuts showed no germination after 1-year-storage, while coated nuts with sodium alginate lost viability after 2-year-storage. However, nuts dried to moisture contents as low as 8% maintained viability and germinated after 2-year-storage, this is the longest record for nuts of Fagus crenata. Due to high moisture content, nuts of beech have been recognized as the recalcitrant seed that is difficult to store by drying. However, the results from this study suggests that beech nuts can be treated as the orthodox seed, which means long term storage can be achieved by drying the nuts to low moisture content and maintaining then under low temperature. Finally, prospective method for increasing long term storage is discussed
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