Study of yield and nitrogen use and recovery efficiencies in lentil genotypes as affected by nitrogen

In order to evaluate yield and yield components of four lentil genotypes (local line, local landrace, ILL-10314 and ILL-6037) as affected by three N fertilizer levels as urea (0, 45, 90 kg/ha), an experiment was conducted at Ardabil Agriculture Research Station, Iran in 2008 as a factorial one based on randomized complete block design with three replications. According to the results, different N fertilizer levels did not have any significant effects on the studied traits, while genotype significantly affected all the studied traits. Having the highest filled pod number and grain number/plant, the local line produced the highest grain yield. In spite of having high grain number/plant, grain number/pod and filled pod number, ILL-10314 had the lowest grain yield, 23% lower than grain yield of local line, which could be partly related to its lower 100-grain weight (about 80% lower than the highest 100-grain weight). ILL-6037 had the lowest filled pod number. This genotype stood in a same yield group as the local line and landrace because of having the highest 100-grain weight.