2021 Volume 14 Issue 2 Pages 96-103
Chrysanthemum indicum of the flower is used as herbal medicines. Since they are wild products and the cultivation method is not established, there are few studies on the suitable nitrogen fertilizer concentration and cultivation in tropical region. Nitrogen foliar application (NF) has immediate effect with a small amount compared to soil fertilization, and it can be expected to increase yield. Therefore, in this study, we first set nitrogen concentrations of 0, 4, 10 and 20 mM in four levels to clarify the optimum soil nitrogen fertilization from growth, and were set different levels of foliar nitrogen fertilizer concentrations of 0, 1, 2, 4 and 8 mM, and were investigated growth, dry weight and flower components. The result of nitrogen fertilization to soil showed that the growth and photosynthetic rate of C. indicum increased when the NF is higher than 10 mM. Furthermore, the dry weight and chlorophyll content were also saturated at 10 mM. The results of NF in addition to 10 mM soil nitrogen fertilization showed that leaf dry weight and leaf area increased significantly above NF 2 mM. The total number of flowers and dry weight of total flowers was significantly higher at NF 8 mM. The total content of flowers in plant was significantly higher at NF 8 mM for 6 components. It was suggested that soil nitrogen fertilization was saturated at 10 mM, and that NF 8 mM nitrogen concentration was optimum reproductive period.
