)Hordeum vulgare L.(اثر کودهای زیستی بر رشد و عملکرد سه رقم جو دیم

Background and Objectives: Barley (Hordeum vulgare L.) is one of the crops that has a high nutritional value and can be used as animal feed and cover crops to increase soil fertility, as well as has various uses in the food industry. In order to increase the efficiency of nutritional elements, the use of efficient crop cultivars is a cheap and accessible method for farmers. Based on the principles of sustainable agriculture, one of the methods to improve the nutrition status of crops is to use biological fertilizers. Considering the importance of barley cultivation in Lorestan province, this study was conducted to investigate the effect of biological fertilizer in combination with common cultivars in this region. Materials and Methods: The experiment was conducted in the form of split plots in the form of a randomized complete block design with three replications in 2014-2016. The main plot includes three varieties of barley, including Mahor (M), Izeh (I) and Khorram (K). The subplot of four types of biofertilizer treatments included control (without biofertilizer), Azotobacter (A), mycorrhizal (M) and Azotobacter + mycorrhizal (AM). Barley seeds were inoculated with biofertilizers according to their instructions before planting. The seeds were poured on nylon in the shade, and one package of biological fertilizer per hectare was dissolved in an appropriate volume of chlorine-free water. After filtering the fertilizer solution with a thin cloth, it was sprayed on the seeds with a sprayer and mixed well. All of them should be evenly coated with fertilizer. At the time of plant harvesting, some growth characteristics, including seed yield, straw yield, number of seeds per spike, number of spikes per square meter and weight of 1000 seeds per plot, were measured. Results: The result of the analysis of variance showed that cultivar has a significant effect on grain yield, straw yield, number of seeds per spike, number of spikes per square meter, and thousand-grain weight. The result of the mean comparison showed that the highest grain yield, straw yield, number of seeds per cluster, number of clusters per square meter and weight of 1000 seeds are related to M-AM treatment. As a result, the Mahor variety had the highest grain yield compared to the other two varieties. Among the fertilizers used, Azotobacter + Mycorrhiza was the most effective. Therefore, the interaction effect of these two treatments has the greatest effect on grain yield (4931 kg/ha), straw yield (8797 kg/ha), number of seeds per spike (16), number of spikes per square meter (546) and weight of 1000 seeds (17.8 g). Conclusion: The finding indicates that in order to achieve the highest seed yield, it is suggested to cultivate Mahor cultivar along with Azotobacter and Mycorrhiza treatment in the region. Further assessments should be conducted to explore alternative cultivars and other biofertilizers for the region. [ABSTRACT FROM AUTHOR]