Comparison of quantitative and qualitative characteristics of two tall rice cultivars under different planting systems

In order to compare the quantitative and qualitative characteristics of two tall rice cultivars under different planting systems, an experiment was conducted as a split-plot in a randomized complete block design with four replications at the farmer's field located in Neka during 2021-2022. The rice cultivars at two levels (Tarom Hashemi and Sange-Tarom) as the main plot and the planting systems at three levels (traditional planting, improved planting and system of rice intensification (SRI)) as the sub-factor were considered. The results showed that the Tarom Hashemi cultivar (3371 kg.ha-1) and Sange-Tarom (3448 kg.ha-1) were in the same statistical group in terms of grain yield, but the nitrogen concentration in rice grains for Tarom Hashemi (1.49%) was significantly higher than Sange-Tarom (1.39%). The plants cultivated in the SRI produced the highest grain yield with an average of 3736 kg.ha-1, which showed an increase in yield by 14.9% and 11.3%, respectively, compared with the traditional and improved planting systems. The use of SRI management led to the production of the highest concentration of nitrogen in the grain (1.63%) and the application of the improved planting system resulted in the accumulation of the highest concentration of phosphorus (0.15%) and potassium (0.47%) in the rice grain. Therefore, according to the results of the present research, the use of SRI management system increases the quantitative and qualitative characteristics and sustainable production of rice.