| چکیده انگلیسی مقاله |
Introduction and Objective: In order to fodder production in the hot and dry region of Sistan as the hub of animal husbandry in the province, it is inevitable to investigate and introduce high-yielding alfalfa cultivars. So the present research was conducted to evaluate tropical alfalfa cultivars and identify high-yielding and more compatible cultivars in terms of yield production and selection of stands with suitable potential for selection.
Materials and Methods:This research aims to investigate the phenological, morphological and functional characteristics of 10 tropical alfalfa genotypes (Zabol local purified alfalfa, Zabol local mass, Baghdadi, two Afghani mass, Nikshahri, Omid, lines 473, 472 and 471) in the Zahak Agricultural and natural resources research station, located 20 km from Zabol city, was implemented. The experiment was conducted in the form of a statistical design of randomized complete blocks in three repetitions for 2017-2018 years. In each year, eight plants were harvested at the 20% flowering stage. During the experiment, the traits of days to greening, days to flowering, plant height, leaf to stem percentage, stem diameter, stem number, dry matter percentage, wet and dry fodder yield were measured.
Results:Statistically significant differences were observed between the genotypes in terms of all studied traits. Based on the clustering, the genotypes were divided into two groups, and the first group, including Omid, Baghdadi, and the purified local alfalfa of Zabol, was superior to the others. In the comparison of the averages by Duncan's method, Omid variety ranked first with the average yield of wet and dry fodder 107.589 and 28.323 tons per hectare, respectively. The Baghdadi variety and the local purified line of Zabol ranked second and third respectively with the average yield of 103.513, 102.463, 26.419 and 27.322 tons per hectare. These genotypes were in good condition in terms of other traits (plant height, number of stems and percentage of leaves per stem).
Conclusions:Considerable variation between genotypes was observed in terms of studied traits. The highest seed yield was observed in the genotypes of Omid, Baghdadi and the purified local alfalfa of Zabol. In favorable conditions, a significant amount of land in Sistan and Baluchistan province and similar regions can be dedicated to alfalfa cultivation, including Omid, Baghdadi and the purified local genotype of Zabol.
Key words: drought stress, local mass, fodder production, variety, dry areas
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