Evaluation of Growth Characteristics of Flax. (Linum usitstissimum L.) With Application of Organic and Nitrogen Fertilizers

In order to study of some flax characteristics under nitrogen and organic fertilizer, a field experiment was conducted in experimental farm of Agricultural Faculty of Shahid Chamran University of Ahvaz at 2015-2016 growing season. Experimental design was randomized complete block as factorial arrangement with three replications. The first factor was different nitrogen fertilizer sources, control (no nitrogen fertilizer), 150kg.ha-1 urea, 75 kg.ha-1 urea+Nitrocara biological fertilizer and 100 kg.ha-1 Slow Released Urea). The second factor was different organic fertilizer sources as control (no organic fertilizer application), 5 tones.ha-1 vermicompost, 2.5 tones vermicompost+ humic acid and humic acid). The results showed the highest crop growth rate (CGR)(2.28 g.m-2.day-1) and leaf area index(LAI) (4.35) in nitrogen treatments were related to 150 kg.ha-1 urea fertilizer and in organic fertilizer treatment, the highest CGR(22.8 g.m-2.day-1) and LAI (4.15) were conducted at 2.5 tones/ha vermicompst+humic acid treatments on GDD=737 at capsuling phonological stage. The highest relative growth rate (RGR) were obtained at urea fertilizer (0.09) and humic acid (0.02) at GDD=527 (flowering stage). The highest grain yield (2706.67 kg) was obtained at vermicompost(2.5 tons.ha-1)+ humic acid +urea fertilizer. The results of this study indicated that application of organic and biological fertilizers alone or in combination with chemical fertilizers have a positive effect on improving the quality and quantity of flaxen. In this experiment, application of organic fertilizers showed good effect than nitrogen fertilizer and it was significantly more than control treatment.