Effect of drought stress and bio-fertilizers and chemical fertilizers on some morphplogical and physiological characteristis of linseed (Linum usitatissimum L.)

In order to evaluate the effects of drought stress, bio-fertilizers and chemical fertilizer (N) treatments on some traits of linseed, include percent of proline, potassium and calcium and the pattern of CGR, a field experiment was conducted as split-plot in RCBD design with three replications at Shahrekord University in 2013.Drought stress at four levels of without stress (with potential of 0.3 atmosphere), light stress(with potential of 3.5 atmosphere), moderate stress(6.5 atmosphere) and severe stress (9.5 atmosphere) as main factors and five fertilizer treatments of control (no ferlilizer), chemical fertilizer (N), bio-fertilizer of Azotobarvat 1, Azotobarvar2 and combination of Azotobarvar 1 Azotobarvar 2 as minor factors were used. Results showed that the effects of drought stress, fertilizer and their interaction on the characteristics of proline, calcium and potassium concentrations were significantat 1percent level (P≤0.01).The maximum proline (19.24 mg/g dry weight) and potassium (3.10%) obtained under severe drought stress and Azotobarvar 1 Azotobarvar2 treatments and maximum calcium obtained under severe drought stress and Azotobarvar2 treatments. Analyzing of the trend of crop growth rate the maximum CGR observed at65days after seedling emergence in soil in both control treatment of without stress and chemical fertilizers(N P).Because ofthe side environmental effects of using chemical fertilizers, using bio-fertilizers of azotobarvar 1, Azotobarvar 2 is recommended.