Combined effect of nitrogenous fertilizer, Nitroxin and vermicompost on yield and yield components of potato(Solanum tuberosum L.) in Damavand

To study of combined effect of vermicompost and nitrogen fertilizers, nitroxin on yield and yield components of potato a factorial based on randomized complete block design (RCBD) with three replications was conducted in Damavand city in 2015. The first factor was three levels of vermicompost including no application (control), application 5 and 10 ton.ha-1 and the second factor was four levels of nitrogen fertilizers and Nitroxin including no application(control),application 100% of the recommended consumption nitrogen fertilizers(150kg.ha-1urea),application nitrogen bio fertilizer (5kg.ha-1Nitroxin)and application 75% of the recommended consumption nitrogen fertilizers(100kg.ha-1urea) and nitrogen bio fertilizer (5kg.ha-1Nitroxin). Analysis of variance showed that vermicompost and integration of nitrogenous fertilizer and Nitroxin in most traits were significant. Results of mean comparison showed that the highest tuber yield of five tons per hectare use of vermicompost (22/52 kg.ha-1) and taking seventy-five percent of the recommended amount of nitrogenous fertilizer with biological Nitroxin (23/8 kg.ha-1). Finally the consumption of 5 tons per hectare use of vermicompost and application 75% of the recommended consumption nitrogen fertilizers (100kg.ha-1urea) and nitrogen bio fertilizer (5kg.ha-1Nitroxin) the results were the best