ASSESSMENT OF SRI WITH CONVENTIONAL METHOD OF RICE CULTIVATION IN BORO SEASON

Abstract

A field experiment was carried out at Agronomy Field of Sher-e-Bangla Agricultural University Dhaka during the period from December 2012 to May 2013 to assess the System of Rice Intensification (SRI) with conventional method of rice cultivation in born season. The experiment consisted of two factors. Factor A: Planting method (2 levels); P1 : conventional method. P2: SRI method and factor B: Variety (5 levels): V 1 : BR 16. V 2: 13RRl dhan29. V3: BRRI dhan50. V4 : BRRI hybrid dhan2 and V 5 : Heera 4. The experiment was laid out in split-plot design with three replications. Experimental results showed that planting method had significant efibet on all the agronomic parameters except leaf area index (LAI), total dry weight m 2. unfilled grains panicle", rachis branches panicl&'and harvest index. The tallest plant (112.43 cm). root (29.10 cm), higher number of tillers hill'(43.45) at harvest was recorded in P 2. Fligher effective tillers hilr' (41.13). longer panicle (28.15 cm), higher total grains panicle-1 (216.89), number of filled grains panicle' (166.82), grain yield (9.10 t hi) and straw yield (9.48 t ha1 ) were observed in SRI than the conventional method. Variety also significantly influenced all the growth and yield attributes except root length. The longest plant (119. 1cm), highest number (11.62) of rachis branches panicle-1 (11.62), longest panicle (28.20 cm) and highest 1000-grains weight (29.91 g) were produced in V5. Statistically similar grain yields (8.64. 9.16 and 8.97 t ha 5 and biological yields (18.31. 18.58 and 18.08 t ha) were produced by V 2. V4 and V5 respectively. The lowest grain yield (8.10 t ha4) and straw yield (8.75 t ha4 ) were recorded in V 1 and V3 respectively. Maximum number of effective tillers huE' (52.47) was produced in treatment combination of P 2V1 and minimum (8.87) in PV 5. The longest panicle (30.53 cm), maximum total grains panicle-1 (255.40) and unfilled grains (88.60) were also recorded in P2V2.The shortest panicle (23.52 cm) and lowest numbers of grains panicle-1 (145.80) were found in P,V3. The highest grain yield (9.60 t ha4) and straw yield (10.02 t hi') were produced in P2V4. The lowest grain yield was obtained in P,V 1 (7.56 t hi') and straw yield (8.38 t hi') in P1 V3 . All of the five varieties preformed better in SRI practice than in the conventional practice. SRI can give extra return about 11. 26,788 ha' compared to the conventional method of rice cultivation in born season.