Evaluation of chemical, organic and biological nitrogen on agronomic traits of different linseed ecotypes (Linum usitatissimum L.)

Due to importance of role of nitrogen on the agronomic traits of linseed oil, a factorial experiment was conducted in randomized complete block design with three replications at the field research station of faculty of agriculture at Shahrekord University in 2012. Five different treatments of fertilizer including urea, azomin, nitroxin, supernitroplus and control (without nitrogen) as the first factor and three ectotype of Iranian, French and Canadian linseed as second factor were evaluted. The results showed that, ecotypes and fertilizer treatments had significant effects on the plant height, leaf number, number of lateral branches, number of capsule, shoot dry weight per plant and grain yield per m-2. The maximum leaf number, number of lateral branches, number of capsule and shoot dry weight per plant were observed in French ecotype, while for the other traits Iranian ecotype had priority. ‏The traits measured under the chemical nitrogen treatment (urea) was greater than other fertilizer treatment. Although the resonse of linseed to biological and organic nitrogen was lower than chemical nitrogen, but it was significantly higher than control. Thus, application of biological and organic nitrogen, due to less environmental pollution, is reasonable compare to chemical fertilizer.