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From NARO, Especially for Satsuma mandarin, it seems that there is a big merit because the fruits can be shipped when the open-field mandarin is not available by heating in winter. Since it is cultivated by meticulous water management, the taste such as sugar content is improved, and in the warm cultivation of Satsuma mandarin, the yield is higher than that of open-field mandarin, and it seems that many farmers are increasing the yield. Warm cultivation of Satsuma mandarin is very early heating (11 / 1-12 / 10), early heating (12 / 10-12 / 24), normal heating (12 / 25-) depending on the difference in the heating time. It seems to be roughly divided into 1/10). In particular, early heating destabilizes flowering, so it is important to secure the amount of flowering. Results of summer branches The mother branches and summer pruning, irrigation, etc. are used to secure and enhance the summer branches, and soil drying, underground cooling, and spraying of benzyladenine and ethicrozete emulsion are used to promote flowering. Furthermore, it seems that the warming time is decided by confirming the flowering by the watering method. In addition, it seems necessary to pay attention to problems peculiar to greenhouse oranges such as tree vigor, high temperature damage, salt accumulation in soil in greenhouse and control of pests under hot and humid conditions. For the excellent agricultural products introduced this time, it has been a long time for the producers to thoroughly control the temperature, humidity, moisture control, etc. in the green house, and to fully ripen the fruits at this time while leaving the blue skin. It is a skill that can be achieved by a master cultivated through his experience.
The impression of Tokushima Prefecture is that the skin is thin, soft and sweet. Because it is cultivated in a greenhouse where the temperature and moisture are controlled, it is a little smaller than the mandarin oranges cultivated in the open field, but its sugar content is high and the taste is good. The delicious Tokushima greenhouse oranges, which have a good balance of moderate acidity and sweetness, are in season from June to July.
Tokushima Prefecture was established in the abolition of the han system in July 1871, but in November, “Myodo Prefecture (Awa, Sanuki, Awaji Province) was the target prefecture. The name was changed to “prefecture)”, and in February 1873, Kagawa prefecture was incorporated into the jurisdiction of Meito prefecture and September 1875. In August 1876, the former Awaji province was incorporated into Hyogo prefecture, and the former Awa province was also under the jurisdiction of Kochi prefecture, and Myodo prefecture was abolished. Then, in 1880, Tokushima Prefecture was re-established and continues to this day.