RESPONSE OF POT MARIGOLD (Calendula officinalis L.) TO DIFFERENT APPLICATION METHODS AND CONCENTRATIONS OF SEAWEED EXTRACT

Abstract

This research study was carried out in the open field during the two successive seasons of 2012/2013 and 2013/2014. The aim of this investigation was to study the response of pot marigold (Calendula officinalis L.) to different application methods and concentrations of seaweed extracts applied as a commercial compound. Seven treatments were initiated, i.e. three concentrations of seaweed extracts (500, 1000, 1500) were used either as foliar spray or as soil drench in addition to the control treatment (tap water). Results indicated that foliar spray with 1500 ppm of seaweed extract increased significantly plant height, number of flowers per plant and vase life in the two tested seasons. However, foliar spray with the lowest concentration of seaweed extract (500 ppm) resulted in significant increments in flower stalk length, flower diameter and carbohydrates content. Moreover, the same concentration showed significant increases in total carotenoids, nitrogen, and phosphorus percentage when used as soil drench in the two tested seasons.

Effect of Seaweed Extract Application Rate and Method on Growth, Flowering and Yield of Pansy (Viola x wittrockiana)

“…Secondly, the continuous supply of nutrients and growth-promoting compounds through drenching stimulates lateral branching and encourages the plants to produce more side shoots, resulting in a fuller and more expansive plant spread. The findings of the present investigation are in conformity with the reports of Tartil et al, [16] in pot marigold; Karim et al, [11] and El-Hady [12] in Tuberose; Sohier et al, [13] in Dahlia; Sumangala et al, [6] and Kularthne et al, [7] in rose; Alhasan et al, [8] in gerbera; Zelikovic et al [9] in pansy; Tiwari et al, [10] in wheat.…”

Effect of Seaweed Extracts on Growth and Yield of China Aster cv. Arka Archana under Prayagraj Agro Climatic Conditions

“…Similar findings have been reported in previous studies conducted on various plant species, including marigold by Russo et al [23], chrysanthemum by Hegde et al [15] and Bhargavi et al [22], pot marigold by Tartil et al [16], rose by Praveen et al (2020), and Chinese carnation and Gazania splender by Majeed Khadim Al-Hamzawi [24].…”

“…Similar findings have been reported by Russo et al [23] in marigold, Pruthvi et al [25] in chrysanthemum, Tartil et al [16] in pot marigold, Bhargavi et al [22] in chrysanthemum, Praveen et al [18] in rose, and Majeed Khadim Al-Hamzawi [24] in Chinese carnation and Gazania splender. Their studies also demonstrated the positive effects of treatments on flower yield, emphasizing the importance of vegetative growth and photosynthate utilization in maximizing flower production.…”

“…Similar findings have been reported in previous studies. Hegde et al [15] observed comparable results in chrysanthemum, Tartil et al [16] in pot marigold, Kahkashan et al [17] in tuberose, and Praveen et al [18] in rose, further supporting the beneficial effects of Ascophyllum nodosum on plant growth. superior to all the treatments.…”

“…Similar findings have been reported in previous studies conducted on various plant species. Bhargavi et al [22] observed similar effects in chrysanthemum, Hegde et al [15] in chrysanthemum, Praveen et al [18] in rose, and Tartil et al [16] in pot marigold.…”