Assessment Results of Nitrogen amount on Morphological Characteristics associated lodging in local Tarom rice

To evaluate the effect of stress concentrations and nitrogen on morphological characteristics associated with lodging and local Tarom rice agronomic traits, the experiment was a split plot in a randomized complete block design with four replications in The farm is located at Amol In years 2009 and 2010 were executed. As main plots Values nitrogen for Source of urea with 3 levels Included (46, 69, 92 kg N per ha urea) and subplots consisted of four levels of stress or nitrogen intake (Stress in during full panicle stage, Tension in the early heading stage, Tension at transplanting, and tillering stage) respectively. The results showed that nitrogen stress at the tillering stage. What percentage of high and reduced clusters and increase panicles empty in each cluster. The highest percentage of spikelet per panicle was obtained in year 2009 with consumption of 69 kg nitrogen per hectare. The result was perfect Maximum biological yield and Minimum straw yield in 2009, Nitrogen stress on heading. Considered Percent filled spikelet, spikelet number per panicle and seeds weight as the most important components that have very high correlation with grain yield.

Rice, Nitrogen stress, lodging, grain yield