Grain oil and fatty acids composition of soybean affected by nano-iron chelate,chemical fertilizers and farmyard manure

Applying organic sources has been recommended to increase soil fertility and crop growth in sustainable production systems. Less information is available on the effects of organic inputs on soybean oil quality in the presence of nano-iron chelate. Field experiments were conducted during 2012 and 2013 to investigate the impact of organic, nano- and chemical sources on oil content and fatty acid composition of soybean (Glycine max L.] Merr.). In split-plot arrangement of treatments, the main plots consisted of four fertilization systems: (F1): cattle manure, (F2): chemical fertilizers, (F3): cattle manure + chemical fertilizers, and (F4): control (without fertilizers). The subplots were (N1): soybean treated with nano-iron chelate fertilizer and (N2): control. Results showed that the highest oil yield was obtained in F3 treatment. The application of farmyard manure with nano-iron chelate significantly increased oleic acid compared to chemical fertilizers. The highest stearic acid and linolenic acid were observed in chemical fertilizer-contained treatments. Finally, the organic manure increased the oil quality of soybean.