نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه زراعت، دانشکده تولید گیاهی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران
2 گروه علوم زراعی و اصلاح نباتات، دانشکدگان ابوریحان، دانشگاه تهران، پاکدشت، ایران.
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Introduction
The use of medicinal plants has been done since ancient times and may even be considered the origin of modern medicine. Medicinal plants are a source of biomolecules with therapeutic potential and as a lead to develop new drugs. Black cumin (*Nigella sativa* L.), often referred to as a "miracle herb," is a medicinal plant that has been used worldwide for centuries in the treatment and prevention of diseases such as cancer and diabetes. Additionally, it has been valued as a spice and flavoring agent in products like bread and sweets. Various factors influence the growth and yield of black cumin per unit area, with planting date being particularly significant. The timing of planting affects environmental conditions during the plant's growth stages, influencing the rates of vegetative and reproductive growth, and ultimately impacting yield. Therefore, selecting the appropriate planting time is crucial for the successful cultivation of any crop, including black cumin. The aim of this research is to determine the most suitable planting date of black cumin for this plant and the response of different ecotypes of this medicinal plant to the planting date in the weather conditions of Gorgan city.
Materials and Methods
In order to evaluate different ecotypes of black cumin in response to planting date in Gorgan, a field experiment with four planting dates was carried out in the cropping year of 2020-2021 at the research farm of Gorgan University of Agricultural Sciences and Natural Resources, Iran. The experiment was carried out in the form of split plots based on completely randomized block statistical design with three replication, in which four planting dates were 18th December, 17th January, 16th February and 18th March as the main plot and thirteen ecotypes (Such as Tafaresh, Gardmiran, Razan, Hamedan, Arak, Esfahan, Semirom, Eqlid, Ashkazar, Zabol, Bajestan, Sarayan and Khaf) with 3 replication were considered as sub-plot. In this research, the attributes of plant height, number of branches per plant, number of follicles per plant, number of grain per follicle, weight of 1000 grains and grain yield were measured. After harvesting, measurements were taken and then the data were analyzed with SAS 9.4 statistical software and means comparison was done with LSD’s test in significance at 5% probability level. Graphs were prepared using Excel software.
Results and Discussion
The results showed that the interaction effects of planting date and ecotype on plant height, number of branches per plant, number of capsules per plant, number of grains per capsule and 1000- grain weight were significant. However, the main effects of planting date and ecotype on grain yield were significant, and the interaction effects were not significant. With the delay in planting, all measured traits decreased. The highest grain yield was obtained from the first planting date (December 18) with 1245 kg per ha. The highest grain yield was obtained from Khaf (1245 kg.ha-1), Sarayan (1179 kg.ha-1), Bajestan (1156 kg.ha-1), Zabol (1141 kg.ha-1) and Esfahan (1117 kg.ha-1) ecotypes. In contrast, the lowest grain yield was obtained from the fourth (March 18) planting date with 694 kg.ha-1. The lowest grain yield was obtained from Arak and Gardmiran ecotypes with 903 and 890 kg.ha, respectively. With the delay in planting, the grain yield of high-yield ecotypes decreased linearly (8-9 kg.ha for each day of delay in planting), with the difference that the decrease in grain yield in the Bajestan ecotype (5.8 kg.ha for each day of delay in planting) was less than other ecotypes, which indicates the high adaptability of this ecotype to the planting date and environmental conditions of Gorgan. Also, there is a positive and significant correlation between grain yield and traits of plant height (0.73**), number of branches per plant (0.56**), number of follicles per plant (0.83**), number of grains per follicle (0.84**) and 1000- grain weight (0.55**).
Conclusion
In general, the results of this research showed that planting date and ecotype have a significant effect on black cumin yield, and it is recommended to plant high-yield ecotypes in December to obtain higher grain yield in Gorgan and additional tests should be done in this area for final confirmation.
کلیدواژه‌ها [English]
©2023 The author(s). This is an open access article distributed under Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source.
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