Effect of supplemental light on the quality of green asparagus cultivated by winter Fusekomi forcing culture
Winter Fusekomi forcing culture of asparagus is becoming popular in Japan because the method can make production of asparagus possible during cold season whereas spring and summer-autumn harvest are still major product season. However, there are some problems such as the color of the spear is pale, and rutin content is lower due to the low light intensity, especially in the production area with snow and little sunshine. The objective of this study was to investigate the effect of supplemental lighting on yield, rutin content, sugar (fructose, glucose, sucrose), and spear color by using different irradiation time and different numbers of fluorescent lamps on the winter Fusekomi forcing culture. Compared to the control plots, rutin content was significantly increased in the supplemental lighting plots. No significant difference or negative impact was observed in sugar contents and yield in each plot. The spear colors also appeared deeper, less pale in the supplemental lighting plots than that of the control plots. These results suggested that supplemental lighting was effective to improve the quality of asparagus spears (such as rutin contents, spears color), especially for the production area that has low light intensity or in short day conditions.
Wambrauw, D.Z.K., Kashiwatani, T., Komura, A., Hasegawa, H., Narita, K., Honda, K., Maeda, T. and Yamaguchi, T. (2020). Effect of supplemental light on the quality of green asparagus cultivated by winter Fusekomi forcing culture. Acta Hortic. 1301, 91-96
Asparagus officinalis, environment control, HPLC, rutin, spear color, sugar