Abstract

THE EFFECT OF PLANTING DENSITY ON THE CHARACTERISTICS RELATED TO THE RICE CULTIVAR PANICLE IN NORTH REGIONS OF KHUZESTAN, IRAN

*Kaveh Limouchi

Abstract

This paper aims at determining the most proper planting density in the form of transplantation on the yield and yield components of rice cultivars in north regions of Khuzestan located in Iran as factorial with two planting density factors in three levels (15×15, 20×20 & 25×25) and five cultivars (red Anbori, Champa, and Ramhormoz pollen) as split-plot design in randomized complete blocks with three replications in 2010 crop year. Variance analysis results revealed that there was a significant difference in all characteristics among different planting dates and cultivars at 1% level. while grain yield does not have a significant difference in the interaction of two factors. The maximum grain yield in 20×20 cm density was in average 3070.11 kg /ha; and among cultivars Champa and Ramhormoz pollen possessed the maximum and the minimum grain yield respectively with the average 3572.78 and 2910.22 kg/ha. Investigating changes in characteristics of 1000-grain weight, panicle length and floret number revealed that density rise caused increase in these characteristics, yet in secondary branches, as density increased changes trend descended. There was no significant difference in panicle length and secondary branches statistically. The maximum and minimum grain densities were attained respectively in 20×20 cm and 15×15 cm densities. Ultimately it can be concluded that 20×20 cm density is the most appropriate density in Khuzestan climate as it causes the maximum grain yield.

Keywords: rice, density, cultivars, yield and its components, panicle.