茶樹に対するビニル被覆の効果について

抄録

1. In order to examine the effect of vinyl cover on the tea plant, some vinyl houses were established and an experiment was carried out from March to April 1954.
2. The indoor temperature and relative humidity were raised by vinyl cover, but the outdoor temperature at night was higher than the indoor on fine day.
3. The growth of tea bud was promoted by vinyl cover, and the suitable plucking period was hastened about one week. The quality of tea was also improved. It was recognized by the results of chemical analysis that the tannin content of the tea leaf was increased by vinyl cover.
4. The difference of temperature according to the color and transparency of the vinyl film was scarecely recognized, but the transparent sheet made the indoor temperature higher generally, the growth of bud quicker, and the quality of tea better more or less than the half transparent one.