Effect of Azotobacter inoculants and Mushroom compost on nitrogen use efficiency of potato(Solanum tuberosum L.) - Sante Variery

Maximizing of nitrogen use efficiency has an important rule in sustainable agricultural development. This experiment wasconducted in order to investigate the reduction effect of nitrogen and instead useing of Azotobacter inoculants and Mushroom compost on potato yield in 1392.The experiment performed split factorial based on complete randomized design in three replication in the farm of Sheykhlar located in Razan Hamedan.Main factor was nitrogen from the source of urea in three levels including 100% nitrogen (as suggested by soil and water research institute) ¡ 75% nitrogen suggested¡ 50% nitrogen suggested . Second factor was mushroom compost and Azotobacter levels as factorial.Compost were used in two levels control and 11 ton/ha. Azotobacter (Azotobacter chroococcum) were used in two levels control and application of bacteria as spraying on tubers. Results of nitrogen application showed significant effect on tuber number per unit area¡tuber yield¡ average weight of tubers per plant in 1% level of probability. Results of using compost also showed significant effect on tuber number per unit area¡ average weight of tubers per plant in 1% level of probability. Azotobacter showed significant effect on total number of tubers per unit of area ¡ tuber yield and average weight of tubers per plant in 5% level of probability.