ﺑﺮرﺳﻲ اﺛﺮات ﺗﻌﺪاد ﻧﺸﺎء و آراﻳﺶ ﻛﺎﺷﺖ ﺑﺮﻋﻤﻠﻜﺮد و اﺟﺰای ﻋﻤﻠﻜﺮد ﺑﺮﻧﺞ (Oryza sativa L) رﻗﻢ ﻃﺎرم اﻣﺮاﻟﻠﻬﻲ

bstract
In order to study the effects of planting pattern and seedling number on agronomy traits of rice (Amrollahi cultivar) a field experiment was carried out in the field of amol city in year of 2013. Experimental design was arranged in factorial in basis of Randomized Completely Block design with three Replication. Treatments consist of seedling number in three levels (1 , 3 , 5 seedling in hill ) and planting pattern in four levels (15×15 , 20×20 , 25×25 , 30×30 cm2). Results was showed that the interaction effects of planting pattern and seedling number on plant height was significant at 0.05 probability level. Also had a significant effect on total tiller number , panicle number per m2, filled grain number in panicle and grain yield at 0.01 probability levels. With increasing of plant density, plant height was reduced. The highest panicle number per m2 was obtained in 20×20 cm2 planting pattern and 5 seedling in hill. The highest filled grain in panicle was obtained in 25×25 and 30×30 cm2 planting pattern with 1 seedling in hill.The highest grain yield (6550 kg/ha) was obtained for 20×20 cm2 planting pattern with 3 seedling in hill. For this variety transplanting in planting pattern at 20×20 cm2 and 3 seedling in hill for the best performance of yield attributes were recommended