Effects of nitrogen fertilizers and manure (Farm Yard Manure) on grain yield and yield components

In order to study the effect of nitrogen fertilizers and manure on grain yield and yield components, a field experiment was conducted in the Agriculture Research Field, Babolsar, Iran, in 2012 crop season. This experiment was carried out with two factors, in a split plot arrangements using Randomized Complete Blocks Design (RCBD) with 3 replications. Manure (Cow) fertilizer (10, 20, 30 t/ha) were assigned to main plots and Nitrogen fertilizer (0, 50, 100, 150 kg/ha) were randomized in sub plots. The results indicated that the use of nitrogen fertilizer on traits such as plant height, cob diameter, number of grains per ear, grain yield, 1000- grain weight and biological yield was significance at 5% level. The highest and lowest grain yield was obtained from 150 kg N/ha and without application of nitrogen respectively. The different amounts of nitrogen fertilizer on traits such as ear length, number of rows per ear, cob length and harvest index were not significant. Manure application had not significant effect on any traits, except number of grains per ear,1000- grain weight and harvest index. Manure treatments were not significant due to de composition gradually and therefore can not release enough nutrients, especially nitrogen. The manure should be added to the soil for several consecutive years to show its effect on soil and plants. The interaction of nitrogen fertilizer and manure on ear diameter and biological yield at 5%level should significant effect. The highest grain yield was produced from 30 ton/ha farm yard manure (FYM) +100kg N/ha treatments.