Exploring the Effect of Different Nitrogen Fertilizer Management on the Yield of Rice (Tarom Cultivar)

Inappropriate management of nitrogen affects rice yield and the intensity of disease and pest dispersion and lowers recovery efficiency (RE) in a way that it does not exceed 50%. The chlorophyll meter (SPAD) and leaf colour chart (LCC) are simple, portable diagnostic tools that can measure the N status in situ in rice fields to determine the time of N fertilizer consumption and can be used to effectively manage the fertilizer. To examine the effect of different N fertilizer managements on increasing the efficiency of fertilizer yield in Tarem rice cultivar, an experiment was carried out in Rice Research Station in Amol following a Randomized Complete Block Design with eight treatments and three replications. The treatments included a zero-N control, two splits, and chlorophyll meter 35, 37, 40, LCC 4 and 5. The results showed that LCC 4 and chlorophyll meter 35 were the best management strategy for N fertilizer consumption in Tarem cultivar due to their higher relative yield and physiological, recycling, and agricultural efficiency. Therefore, when N fertilizer is used in plant’s real need time (drawing on SPAD and LCC instruments), unnecessary consumption of fertilizers by farmers can be avoided.