The Effect of Planting Dates on Narcissus Plant (Narcissus tazetta L.) under Irrigation and Effective Microorganisms (EM)

علوم باغبانی

Article 11, Volume 39, Issue 2 - Serial Number 66, June 2025, Pages 344-331   

Document Type: Research Article

DOI: 10.22067/jhs.2024.90121.1380

Authors

A. Akrami; H. Bayat^* ; S. Daghighi; M.H. Aminifard

Department of Horticultural Sciences, Faculty of Agriculture, University of Birjand, Birjand, Iran

Abstract

Introduction
Narcissus is the most important early-season blooming flowering plant that belongs to the Amaryllidaceae family. N. tazetta is a valuable plant for cosmetics, cut flowers, and landscape plants. The growth and flower quality of narcissus could be improved by adopting proper cultural practices and application of plant nutrients. Narcissus is one of the geophyte plants; therefore, one of the important and influencing factors on the growth and performance of narcissus is the appropriate planting date, especially in the first year. Bio-fertilizers can be mentioned among the new and effective sources of fertilizer that are used in plant nutrition today. These fertilizers contain useful soil microorganisms such as bacteria, fungi and actinomycetes with their metabolites that stimulate the quantitative and qualitative performance of the plant in different ways. Since there is little information about the effect of planting and environmental conditions, including the date of planting, nutrition with bio-fertilizers and irrigation on Narcissus tazetta. Therefore, the investigation of these factors can help the cultivation of narcissus plant in South Khorasan region. Therefore, the aim of this research was to study the effect of planting dates, summer irrigation and EM bio-fertilizer on the growth and reproductive characteristics of N. tazetta cv. Shahla in South Khorasan region.
 
Materials and Methods
To investigate the effect of planting date, summer irrigation and EM bio fertilizer on the growth, ornamental and physiological traits of Narcissus tazetta cv. Shahla, an experiment in the form of randomized complete block design with three replications during crop years 2021-2022 in Qaen city of South Khorasan province was implemented. The experimental treatments were bulb planting on July 1 without irrigation, bulb planting on July 1 with irrigation, bulb planting on July 1 along with irrigation with EM fertilizer, bulb planting on September 1 without irrigation, bulb planting on September 1 along with irrigation, and bulb planting on September 1 along with irrigation with EM. The measured indices including vegetative characteristics (number of leaves, leaf length, leaf width and plant height), reproductive traits (corona diameter, flower length, flower diameter, stem diameter, flowering stem length, number of flowers per square meter and number of flowers per stem), physiological traits (total chlorophyll, chlorophyll a, chlorophyll b and carotenoid content) and leaf nutrients (nitrogen, phosphorus and potassium). Finally, the experimental data were statistically analyzed using SAS, JMP Statistical Discovery Pro v13.2.1 program and comparison of means was performed by LSD test at 5% probability level.
 
Results and Discussion
The results showed that the maximum amount of leaf length and plant height was obtained from the bulbs planted in September and were irrigated with EM fertilizer. However, the highest number of leaves and leaf width were obtained from the bulbs planted in July along with irrigation with EM fertilizer. Planting the bulbs in July along with irrigation had the highest diameter of the flower corona and the length of the flowering stem. In the second year of the experiment, the maximum flower diameter was obtained from the bulbs planted on July 1 with irrigation (3.61 cm). The results showed that the number of flowers per square meter in both years of the experiment was affected by the date of planting and irrigation, so that the bulbs planted on July 1 with irrigation and irrigation with EM fertilizer had the highest number of flowers. The highest number of flowers on the flowering stem was obtained from the treatments of planting bulbs on July 1 (7.21 flowers per square meter) and September 1 (1.7 flowers per square meter) along with bio-fertilizer. In addition, the highest total chlorophyll, carotenoid, nitrogen and potassium content was obtained from September culture. Enhancing the supply of nutrients throughout the growing season, a key mechanism of bio fertilizers, promotes the development and reinforcement of floral structures in the terminal meristem of the bud during the phases of cell meiosis in summer and the stimulation of flower buds, which ultimately boosts the yield of the narcissus flower farm.
 
Conclusions
The results of this research showed that planting the bulbs in September and using EM bio-fertilizer improved the vegetative characteristics of narcissus flower. In addition, the results showed that the planting of bulbs in July and irrigation in summer improved the reproductive characteristics of N. tazetta cv. Shahla. Overall, the results indicate that planting narcissus bulbs on July 1, along with summer irrigation, significantly increases the yield of narcissus flower in South Khorasan province.

Keywords

Bio fertilizer; Flowering; Summer irrigation; Vegetative traits

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