Effect of plant density and planting pattern on yield components and yield of rice (Oryza sativa L.) var. Tarom Amrollahi

Subject Areas : Journal of Plant Ecophysiology

norollah kheyri ¹ , حمیدرضا MOBASER ² , بهنام masoodi ³ , پرویز YADOLAHI ⁴

1 - باشگاه پژوهشگران جوان و نخبگان ، واحد آیت الله آملی، دانشگاه آزاداسلامی ، آمل، ایران
2 - گروه زراعت ،دانشکده کشاورزی، دانشگاه آزاد اسلامی واحد قائمشهر، قائمشهر، ایران
3 - گروه زراعت و اصلاح نباتات،واحد چالوس،دانشگاه ازاداسلامی ،چالوس ،ایران
4 - باشگاه پژوهشگران جوان ونخبگان ،واحد شهر کرد،دانشگاه آزاد اسلامی، شهرکرد، ایران

Received: 2015-03-28 Accepted : 2015-07-05 Published : 2016-12-01

Keywords: Rice, Planting pattern, Seedling number, Grain crop,

Abstract :

In order to study the effects of plant density and planting pattern on agronomic traits of rice (var. Tarom Amrollahi), a field experiment was conducted as a factorial in a randomized complete block design with three replications in Amol in 2013. Treatments consisted of three levels of plant density (1, 3 and 5 seedlings per hill) and four levels of planting pattern (15×15, 20×20, 25×25 and 30×30 cm2). Results showed that the interaction effect between plant density and planting pattern was significant on all traits, except fertile tiller number per hill. Increasing the plant density, decreased the plant height, panicle length and number of filled and unfilled grain, but increased the panicle number per m2 and grain yield. Changing the planting pattern from 30×30 to 15×15 cm2, decreased the fertile tiller number per hill by 56.9 %. The treatment of 25×25 and 30×30 cm2 planting pattern with 5 seedlings per hill was represented the highest amount of 1000-grain weight. The highest grain yield was obtained in the treatment of 20×20 cm2 planting pattern and 3 seedlings per hill with the average of 6550 kg.ha-1. It seems that, the plant density of 3 seedlings per hill and planting pattern of 20×20 cm2 was considered as the best planting density for rice of var. Tarom Amrollahi.