Quality Improvement of Ornamental Flowers
Editor: Kunio Yamada, Masayoshi Nakayama, and Kazuo Ichimura
April 2024
We tried to quantify the relationship between environmental conditions, and yield and quality of cut roses. Three varieties of cut roses with different characteristics were cultured and harvested for three years. Significant negative linear regressions between the interval of flowering flush (growth period) and the mean temperature per growth period were observed. The quality of cut flowers, i.e., stem length, cut flower weight per stem, and specific cut flower weight (the cut flower weight per stem length) was generally negatively correlated with temperature and positively correlated with light intensity. Light intensity also positively affected the total cut flower weight per plant during each growing period. The daily gain in the flower weight of cut flowers per plant (the total cut flower weight divided by the number of days of the growth period) is an indicator of the productivity of the plant; it showed significant positive correlations with the mean daily light integral in three varieties. We believe that such basic analysis is the starting point for the construction of “data-based techniques for crop cultivation”, which has become a hot topic in recent years. (Provided by K. Inamoto: NARO)
