Study on cold tolerance of tall fescue (Festuca arundinacea L.) ecotypes under field and controlled conditions

بوم شناسی کشاورزی

Article 23, Volume 11, Issue 1 - Serial Number 39, March 2019, Pages 349-364   

Document Type: Scientific - Research

DOI: 10.22067/jag.v11i1.73193

Authors

Abdolah Soltan Ahmadi¹; Ahmad Nezami^{* 1}; Mohammad Kafi²; Hamid Reza Khazae²

¹Department of Agronomy, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran

²Department of Agronomy, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran

Abstract

Introduction[1]
Tall festuca (Festuca arundinacea) belongs to Poaceae family and is a cool-season perennial plant native to Europe. Festuca species are broadly adapted to different climate conditions. To date, 9 different species of Festuca have been identified in Iran. These species are growing naturally in different regions of Iran such as Golestan, Mazandaran, Lorestan, Khorasan, Fars, Isfahan, Karaj, Dorood, Damaneh, Alvand and Firoozkooh. Festuca reduces soil erosion due to its fibrous, thick and deep roots. Such roots reduce soil density and improve soil structure and reduce soil erosion, and thus, this plant plays a crucial role in reducing water and wind erosion. Tall fescue is a long-lived perennial species with medium to large leaves. The plant is grown as turf and is considered as an important animal fodder, thus is widely grown in pastures and grasslands. Tall festuca is among the 27 identified species of festuca in Iran. The species is well spread across Iran and has a high potential for growth and production in pastures or mountainous areas, especially in the central, western and northern regions of the country. Tall festuca is a perennial plant, so it is often exposed to cold and freezing stress. Therefore, the successful production of this plant requires the use of cold-tolerant varieties. According to previous studies, although tall festuca has good tolerance to a wide range of environmental stresses (cold and drought), different ecotypes show different cold tolerance, accordingly further studies on growth characteristics and cold tolerance of this plant is necessary, especially in winter type varieties.
 
Materials and methods
The field experiment was carried out in Parks and Green Space Organization, Mashhad Municipality located in the Islamic Republic of Iran Blvd., and Crop Physiology Laboratory, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran in 2013- 2014. The experimental design was a randomized complete block design arranged in a split plot with three replicates. In order to expose the tall festuca plants to winter cold stress, 23 ecotypes were sown on the 7th of October and 6th of November. Dimensions of each plot were 100 × 150 cm and after seed sowing, seeds were covered with composted cattle manure and then irrigated. After emerging the seedlings, the plots were thinned to reach final plant density of 400 plants per square meter. Weeds were manually controlled and irrigation was carried out according to the need of the plants. The data were analyzed using MSTAT-C. The comparison of means was performed through the LSD test at 5% probability level.
 
Results and discussion
The results showed that the effects of sowing date and ecotype were significant on a number of days until emergence, survival percentage, plant dry weight, seed yield, and total dry weight. The phenological investigations and plant height measurement indicated that there was a genetic difference between the ecotypes. In all studied ecotypes, the survival percentage in the second sowing date was higher than that in the first sowing date. However, a number of days until emergence, plant dry weight, seed yield and total dry weight in the first sowing date were found to be higher in comparison to tens second sowing date. In addition, among the studied ecotypes, the highest traits stability with an emphasis on survival percentage and yield components were observed in Isfahan, Boroujen, Daran, Daran-Damaneh, Gandoman, Sanaajan, Mashhad, Sari, Golestan, and Quchan-Seyyed Abad ecotypes. Therefore, these ecotypes were selected as genetic reserves for future studies.
 
Conclusion
In general, the effect of sowing date and ecotype was significant on most of the studied traits such as a number of days until seedling emergence, survival percentage, plant dry weight, seed yield, and total dry weight. In addition, in phenology related traits such as a number of days from flowering to maturity, total growing period length and plant height genetic difference between ecotypes was investigated. Although in most of the traits such as a number of days until seedlings emergence, plant dry weight, seed yield, and total dry weight, the obtained values were higher in the first sowing date compared with the second sowing date, survival percentage showed unlike results so that late sowing increased this index.

Keywords

Keywords: Green area; Height; Planting date; Survival percentage; yield

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