Effect of Planting Arrangement and Nitrogen Fertilizer Rates on Agronomical Traits and Rice (Oryza sativa L.) Yield on Hashemi Cultivar in Guilan Climate.
Sobhan Mahzari
1
(
2Ms.c Graduated of Weed Science
)
Keywords: Rice, Panicle, Fertile Tiller, Grain and Biological Yield,
Abstract :
In order to study the effect of planting arrangement and application of different amounts of nitrogen fertilizer on yield and agronomic traits of experimental rice as split plot in a randomized complete block design with three replications in a field located in Kishakjan village of Rudsar county in 2016 is accomplished. The main plant density treatments were in four levels: D1 = 100 plants per square meter (10×10 cm), D2 = 25 plants per square meter (20×20 cm), D3 = 16 plants per square meter (25×25 cm) and D4=11 plants per square meter (30×30 cm) and sub-treatments were four levels of nitrogen fertilizer (from urea source) including: = N1= zero (control), N2=40, N3=80 and N4 = 120 kg N ha-1. The results showed that the interaction effect of planting density on nitrogen fertilizer rates caused a statistically significant difference on plant height, tiller number per square meter, number of fertile tiller, number of seeds per panicle, grain and biological yield and harvest index of rice. But no significant effect was observed on panicle length and percentage of the unfilled grain. The highest grain yield was obtained at the treatment of 25 plants per square meter with 80 kg nitrogen fertilizer (6833 kg.ha-1) and no significant difference was observed with the treatment of 16 plant density with consumption of 80 kg N (6520 kg.ha-1). The lowest seed yield was obtained in the treatment of 11 plants per square meter without N application (4780 kg.ha-1).