Effects of Fertilizer Rates and Watering on Growth of Sakura (<I>Prunus serrulata</I>)
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Abstract
Sakura (Prunus serrulata) is an important perennial plant in Japan. Currently, Thailand has imported Sakura trees for planting in the highlands to promote agrotourism. However, the basic information on Sakura cultivation in Thailand was limited. The objective of this research was to study the fertilizer rates and watering on the growth and physiological changes of cherry blossoms. The experimental design was factorial in CRD with 4x3 factorial treatments, 5 replications using one year old of plant as plant material. First factor 1 was, four watering frequency i.e., 1) every day 2) every 2 days 3) every 4 days and 4) once a week. Each plant was supplied with 1 liter of water per time. Second factor was three fertilization rates i.e.,1) no fertilizer 2) 5 g of 15-15-15 (N-P2O-K2O) /pot and 3) 10 g of 15-15-15 (N-P2O-K2O) /pot. Plant height (cm), number of branches per plant, branch length (cm), photosynthetic rate (µmol m-2s-1), stomatal conductance (mol m-2s-1), and transpiration rate (mmol m-2s-1) were measured. The results showed that in 4 months after starting treatment, fertilizer rates and watering frequency did not affect growth of Sakura in terms of plant height, number of branches per plant and branch length and there was no interaction between factors. In case of physiological changes, the result found that watering once a week gave the highest of transpiration rate at 1.99 mmol m-2s-1. In addition, interaction between factors was found on stomatal conductance and transpiration rates.
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