The effect of using sulfur fertilizer in seedling box and plant density in field ongrowth and yield of rice Tarom mahali cultivar

In order to investigate the effect of different sulfur levels application with planting densityon yield and yield components of rice of Tarom mahali cultivar, a split plot experimentwas conducted in a completely randomized format with 12 treatments and 4 replications in2011 in Babol. Experimental factors included sulfur at 4 levels (0, 50, 100 and 150 g perseedling box) as the main factor and 3 planting density (30 × 13, 30 × 15 and 30 × 17 cm2)as a secondary factor. Measured traits included plant height, 1000-seed weight, number ofleaves, number of tillers, cluster length, number of pro-empty seeds, Leaf Area Index andseed yield. The results showed that the application of sulfur increased the number of fullgrains in the cluster and also the interaction effects of sulfur application and plantingdensity increased the weight of 1000 grains compared to the control. The results of meancomparison showed that planting density treatment 17× 30 cm2, 100 g of sulfur caused96.65% increase in 1000-seed weight compared to planting density treatment 17× 30 cm2and 50 g of sulfur. Also, the maximum and minimum number of tillers in the mound wereobtained from the combined treatment of planting density 17× 30 cm2 and 150 g of sulfurand planting density 15× 30 cm2 and 150 g of sulfur respectively.