Effect of integrated nutrient management and weed competition on efficiency and potential of accumulation and remobilization of dry matter in wheat main stem internodes

In order to study the effect of integrated chemical and biological fertilizer in competition with weeds on accumulation and remobilization of dry matter, a field study was conducted at 2010-2011 in Agricultural Faculty of Shahid Chamran University of Ahwaz. The experimental design was split-plot based on randomized complete block with 3 replications. The main plot included 5 integrated nutrient managements and the sub-plot also included 3 competitions intensity. Lengths and dry weight of main stem internodes and dry matter remobilization efficiency were calculated. Our results showed dry matter accumulation and translocation efficiency was changed by changing the chemical fertilizer ratio in integrated treatments. The treatment of 50% chemical fertilizer with biological fertilizer had the highest translocation efficiency (43/30), percent of dry matter translocation (51/10), and also, dry matter translocation (2/09). Different integrated nutrient management treatments had higher effect on dry matters translocation efficiency than weed competition treatments. In addition, weight changed more than length in all 3 types of stem internodes. Finally, our results showed that integrated VS. biological methods had more consisted sitvation for wheat in ternods characters.