Investigation Flag Leaf Traits in Different Agronomical Treatments in Rice

In order to study of different agronomical treatments like transplanting date, planting spaces and nitrogen fertilization on rice flag leaf characteristics, a field experiment was conducted at the Rice Research Institute of Iran in 2009. Variety that be used was Line 0856. Results showed in increasing the applications of nitrogen fertilization the flag leaf area was significantly increased and flag leaf angle was decreased at 0.01 probability levels. The flag leaf was improved by early transplanting date due to more extends flag leaf area and decline of flag leaf angle. Also, the highest plant density resulted in a reduction in both flag leaf area and flag leaf angle. None of responsive the flag leaf chlorophyll was affected to different agronomical treatments. Flag leaf characteristics were influenced by nitrogen fertilization levels, transplanting date and plant density, respectively. The flag leaf angle was affected by the interaction effects of transplanting date×nitrogen fertilizer at 0.01 probability levels. In this experiment, transplanting date on 12 May, planting space at 20 × 20 cm and 138 kg N ha for the best performance of flag leaf and yield attributes were recommended. 1