Effect of planting density on growth and flowering of Chrysanthemum grandiflorum
2022
Ebaa Hamoud
The objective of this search was to determine the optimum planting density of Chrysanthemum cultivar " Euro" under the Syrian coastal conditions and its effect on growth ,flowering and essential oil.Rooted cuttings of Chrysanthemum were planted at five different planting densities(five treatments) T1: 10 * 15 cm, T2: 15 * 15 cm, T3: 15 * 20 cm, T4: 20 * 20 cm and T5: 20 * 30 cm with Three replicates for each treatment (1m² for each replicate).The results showed an inverse relationship between planting density and vegetative growth parameters (plant height, number of branches per plant, number of leaves, and plant leaf area) as well as the flowering parameters (number of flowering stems , number and quality of flowers per plant).The results also confirmed that the good development of the vegetative growth at low densities (T4 and T5) was associated with an increase in the plant dry mass, macronutrients (N:P:K) content and chlorophyll content which all had positive effects on flowering.The results showed that Euro cultivar flowers and leaves contained a good percentage of essential oil, particularly in low density, which amounted to 0.298% in plant flowers in the T5 treatment.These positive effects were notably reflected in the economic efficiency; T4 achieved the highest profitability coefficient (202.7%), with the best total profit (2250000 Syrian pounds/dunum).
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