EFFECT OF NUMBER OF SEEDLING PER HILL AND SPACING ON THE GROWTH AND YIELD OF HYBRID RICE

Abstract

An experiment was carried out at the Experimental Field of the Department of Agronomy and Haor Agriculture, Sylhet Agricultural University, Sylhet-3100 under the AEZ 22 (Northern & Eastern Piedmont Plains) in Kharif-II (Aman) season during the period of July 2013 to November 2013 to evaluate the effect of number of seedling hill and spacing on the growth and yield of hybrid rice line Bio-453. The experiment was laid out in a split plot design with three replications. Two levels of seedling hill -1 ) and five levels of plant spacing viz. Sp1 (15 cm × 15 cm), Sp2 (15 cm × 20 cm), Sp3 (20 cm × 20 cm), Sp4 (20 cm × 25 cm) and Sp5 (20 cm × 30 cm) were the treatments of this study. Result obtained from experiment revealed that number of seedling hill -1 viz. NS1 (1 seedling hill -1 ) and NS2 (2 seedlings hill -1 had no significant influence on growth parameter like plant height at different days after transplanting (DAT) while another growth parameter like number of tiller hill -1 at different days after transplanting (DAT) was significantly influenced. Some of yield contributing characters were also significantly influenced by number of seedling hill -1 -1 . Single seedling hill like number of total tiller hill -1 and number of effective tiller hill -1 -1 ) might be attribute by the combined effect of number of total tiller hill produced highest grain yield (8.38 t ha -1 -1 and 1000-grain weight. Plant spacing had significant effect on both growth parameters and different yield contributing characters under the study. The closest plant spacing 15 cm × 15 cm (Sp1) produced maximum grain yield (8.93 t ha , number of effective tiller hill -1 , filled grain panicle -1 and spacing had significant influences on grain yield. The combination of 1 seedling hill -1 ). Interaction effect between number of seedling hill -1 (NS1) along with the spacing of 15 cm × 15 cm (Sp1) produced significantly highest grain yield (9.43 t ha -1 ) and also produced maximum biological yield (25.70 t ha -1 (NS1) along with the spacing 15 cm × 20 cm (Sp2) and 1 seedling hill -1 ). The combination of 1 seedling hill -1 (NS1) along with 20 cm × 20 cm (Sp3) produced statistically similar grain yield (9.26 t ha -1 , respectively) to that of Sp1. Grain yield progressively reduced with increase of spacing at both 1 and 2 seedlings hill -1 -1 and 8.86 t ha . The lowest grain yield (7.00 t ha -1 (NS1) along with the spacing 20 cm × 30 cm which was statistically similar to that of 7.36 t ha -1 ) was obtained from 1 seedling hill -1 and 7.56 t ha -1 -1 , 7.96 t ha -1 (NS1) along with the spacing 20 cm × 25 cm (Sp4), 2 seedling hill obtained from the combination of 1 seedling hill -1

(NS2) along with the spacing 20 cm × 30 cm (Sp5), respectively. -1 (NS2) along with the spacing 20 cm × 25 cm (Sp4)and 2 seedlings hill -1