Effect of variety, spacing and number of seedlings per hill on the yield potentials of transplant aman rice

Abstract An experiment was carried out at Agronomy Field Laboratory, Department of Agronomy and Agricultural Extension, University of Rajshahi during the kharif season to study the effect of variety, spacing and number of seedlings hill-1 on the yield potentials of transplant aman rice. The experiment consisted of three high yielding varieties viz. BRRI dhan32, BRRI dhan33 and BR11, four levels of spacing viz. 10cm25cm, 15cm25cm, 20cm25cm and 25cm25cm and four levels of number of seedlings hill-1 viz. 2 seedlings hill-1, 3 seedlings hill-1, 4 seedlings hill-1 and 5 seedlings hill-1. A split-split plot design was used with three replications assigning the variety on the main plot, spacing to the sub-plots and number of seedlings hill-1 to the sub-sub plots. Variety had significant effects on almost all the yield component characters and yield. All the yield components characters except number of fertile spikelets panicle-1 were highest in case of variety BR11 and hence it produced the highest grain yield (5.92 tha-1). Spacing had a significant influenced on the yield components and yield of rice. All the yield contributing characters were highest at 15cm×25cm spacing and thus it produced the highest grain yield (5.93 t ha-1). Effect of the number of seedlings hill-1 was also significant on almost all the yield enhancing characters. The highest plant height, panicle length, fertile spikelets panicle-1 and 1000-grain weight were found when 2 seedlings were transplanted hill-1 and consequently it produced the highest grain yield (5.78 t ha-1)..