In order to investigate Silicon and potassium application facts on agronomical indices and quantity yield in rice (Oryza sativa L.) Tarom Hashemi cultivar, an experiment was carried out at split-plot in randomized completely block design with four replications at Sari region in 2010. Main factor was silicon rates in four levels including 0, 250, 500 and 750 kg Si ha-1 and subfactor was potassium rates in four levels including 0, 30, 60 and 90 kg K ha-1. Results showed that the all of traits except harvest index significantly (p 0.01; p 0.05) at the silicon rates. Also fertile tiller number, filled spikelet number, filled spikelet percentage, unfilled spikelet number, 1000 grain weigth, grain yield and harvest index significantly (p 0.01; p 0.05) at the potassium rates. maximum of the grain yield (612 g.m-2) were obtained in 750 kg Si ha-1, because most of the tiller number per hill, fertile tiller number, panicle number per m2 and total spikelet number per panicle due this treatment. Most of the fertile tiller number, filled spikelet percentage per panicle, 1000 grain weight, therefore grain yield (575.3 g.m-2) and harvest index (35.6 %) was produced in 90 kg K ha-1. Most of the filled spikelet percentage per panicle were obtained at interaction of 750 kg Si ha-1 × 90 kg K ha-1. Grain yield had been positive correlation with total tiller number per hill, fertile tiller number, panicle number per m2 and total spikelet number per panicle. Harvest index had been positive correlation with fertile tiller number, panicle number per m2, filled spikelet percentage and grain yield. Therefore, 750 kg Si ha-1 and 90 kg K ha-1 due to as most of agronomical indices and grain yield introduced the best of treatment.
کلید واژگان :Agronomical indices, Grain yield, Potassium, Rice, Silicon.
ارزش ریالی : 300000 ریال
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