Effect of different nitrogen-potassium concentrations on growth and flowering of chrysanthemum in a drip hydroponic system

Abstract

Different concentrations of Nitrogen (N) and Potassium (K) at vegetative and flowering stages were evaluated to optimizing their levels for high quality performance of Chrysanthemum morifolium Ramat. cv. 'Mother Teresa' grown in soilless media mixture (cocopeat:perlite:vermiculite = 3:1:1) in a non-recovery drip hydroponic system. The treatments consisted of five nutrient solution concentrations (NSC), having N (50, 100, 150, 200 and 250 ppm) and K levels (40, 80, 120, 160 and 200 ppm) during vegetative stage, whereas during reproductive stage, the N and K levels were 40, 80, 120, 160 and 200 ppm, and 60, 110, 160, 210 and 260 ppm, respectively. The performance of chrysanthemum improved with increasing levels of N-K concentration. The nutrient concentration (NSC-V) of N 250 +K 200 during vegetative and N 200 +K 260 during reproductive stage produced highest (153) number of flowers, plant height (31.5 cm), plant canopy (35 cm) and flower sprays (21) per plant proved to be the best treatment.

Tailoring of a Potential Nanoformulated Form of Gibberellic Acid: Synthesis, Characterization, and Field Applications on Vegetation and Flowering

“…The fertilization program was practiced 2 weeks after planting until the inflorescence reached a diameter of 1.0–1.5 cm . Ammonium nitrate at a rate of 0.5 g L –1 was added to the irrigation water to all treatments for 1 month and then substituted by calcium sulfate at 0.5 g L –1 .…”

“…The fertilization program was practiced 2 weeks after planting until the inflorescence reached a diameter of 1.0−1.5 cm. 32 Ammonium nitrate at a rate of 0.5 g L −1 was added to the irrigation water to all treatments for 1 month and then substituted by calcium sulfate at 0.5 g L −1 . When the plant's height reached 30 cm a compound fertilizer of N:P 2 O 5 :K 2 O (13:3:42) was used at a rate of 0.5 g L −1 .…”

Effect of the Different Soil Types on Chrysanthemum Cut Flower Quality

“…This affected the same ability of each variety in the absorption of nutrients for the allocation of plant dry matter. According to Azeezahmed et al (2016), the higher concentrations of N and K in the nutrient solution improved the quality of morphology variables. Application of 250 mg L -1 Nitrogen and 200 mg L -1 potassium at vegetative phase and 200 mg L -1 nitrogen and 260 mg L -1 potassium at generative phase resulted optimum for growth and flowering chrysanthemum.…”

Differential Responses of Chrysanthemum Growth and Flowering to Varying Ratios of K/ (Ca+Mg) Under Fertigation System

“…The relationship between healthy vegetative growth, flower yield with highquality and nutrient uptake of several ornamental crops grown under antagonistic interactions of K, Ca and Mg in nutrient solution has been examined in numerous studies by Rodrigues et al (2008); Nagina et al (2015); Azeezahmed et al (2016) and Gülser and Cig (2021) on chrysanthemum; Torre et al (2001), Ouchbolagh et al (2015) on rose; Van der Lugt et al (2020) on carnation; Birin (2011), and Khalaj and Kanani (2018) on gerbera.…”