The effect of plant density and nitrogen fertilizer levels on yield and yield component and some physiological indices of rice cv. Tarom Hashemi in Roudsar

In order to investigation of the effect of plant density and nitrogen fertilizer levels on yield and yield component of Hashemi rice, an experiment has been performed in Rudsar city (Gishakjan) in 2016. This study performed as split plot in complete randomized block design with three replication. Plant densities were as main factor in four levels of 100 plant in m2 (1010 cm), 25 plant in m2 (2020 cm), 16 plant in m2 (2525 cm), 11 plant (3030 cm) and nitrogen levels were sub factor were in four levels 0, 40, 80 and 120 kg/ha. The results of variances analysis indicated that fertile tiller number in m2, grain number in panicle, grain yield, biologic yield and harvest index was in effect of plant density, nitrogen fertilizer levels and significant interaction of plant density and nitrogen fertilizer levels. The highest LAI and CGR were in treatments of 100 plant in m2 (1010 cm). LAI and CGR in treatments with higher nitrogen level were more than treatments with lower levels.The most grain yield observed in treatment of 25 plant in m2 (plant distance 20 × 20 cm) and consuming 80 kg/ ha with 6833 kg and the least grain yield was in treatment of 11 plant in m2 (plant distance 30 × 30 cm) and no consuming of nitrogen fertilizer with 4780 kg/ha. The results showed that consuming of 80 kg/ ha nitrogen fertilizer had increased 43 % the grain yield rather than no consuming nitrogen fertilizer. Inspite of consuming more Seedling in density of 100 plant in m2 (plant density 10 × 10 cm) the grain yield was reduced by the reason of competition among plants.
In order to investigation of the effect of plant density and nitrogen fertilizer levels on yield and yield component of Hashemi rice, an experiment has been performed in Rudsar city (Gishakjan) in 2016. This study performed as split plot in complete randomized block design with three replication. Plant densities were as main factor in four levels of 100 plant in m2 (1010 cm), 25 plant in m2 (2020 cm), 16 plant in m2 (2525 cm), 11 plant (3030 cm) and nitrogen levels were sub factor were in four levels 0, 40, 80 and 120 kg/ha. The results of variances analysis indicated that fertile tiller number in m2, grain number in panicle, grain yield, biologic yield and harvest index was in effect of plant density, nitrogen fertilizer levels and significant interaction of plant density and nitrogen fertilizer levels. The highest LAI and CGR were in treatments of 100 plant in m2 (1010 cm). LAI and CGR in treatments with higher nitrogen level were more than treatments with lower levels.The most grain yield observed in treatment of 25 plant in m2 (plant distance 20 × 20 cm) and consuming 80 kg/ ha with 6833 kg and the least grain yield was in treatment of 11 plant in m2 (plant distance 30 × 30 cm) and no consuming of nitrogen fertilizer with 4780 kg/ha. The results showed that consuming of 80 kg/ ha nitrogen fertilizer had increased 43 % the grain yield rather than no consuming nitrogen fertilizer. Inspite of consuming more Seedling in density of 100 plant in m2 (plant density 10 × 10 cm) the grain yield was reduced by the reason of competition among plants.