Touhid Uzzaman
Fertilizer Division, BADC, Dhaka-1000, Bangladesh
R.K. Sikder
Horticulture Development Division, BADC, Dhaka-1000, Bangladesh
M.I. Asif
Department of Seed Technology, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh
H. Mehraj
The United Graduate School of Agricultural Sciences, Ehime University, 3-5-7 Tarami, Matsumaya, Ehime 790-8556, Japan
AFM Jamal Uddin
Dept. of Horticulture, Sher-e-Bangla Agricultural University, Dhaka
Oryza sativa, SRI, Early maturity, Performance
Agronomy field Laboratory, Sher-e-Bangla Agricultural University, Dhaka-1207
Variety and Species
Location, period, varieties, experimental design and plot size: The experiment was conducted at Agronomy field Laboratory, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh from December, 2011 to May, 2012. The experiment consisted sixteen variety viz. BR 3 (V1), BR 14 (V2), BR 16 (V3), BRRI dhan 28 (V4), BRRI dhan 29 (V5), BRRI dhan 36 (V6), BRRI dhan 45 (V7), BRRI dhan 50 (V8), BINA 6 (V9), BINA 9 (V10), BRRI hybrid dhan 1 (V11), BRRI hybrid dhan 2 (V12), BRRI hybrid dhan 3 (V13), Chamak (V14), Hira 1 (V15) and Bhajan (V16) following RCBD design with three replications. The size of unit plot was 3 m × 2.7 m. Distances between plot to plot and replication to replication were 0.75 m and 1.0 m respectively. Seed collection: Seeds of V1-V8 and V11-V13 were collected from Genetic Resources and Seed Division, BRRI, Joydebpur, Gazipur; V9 and V10 from BINA, BAU, Maymensingh-2202; V14-V16 was collected from Supreme Seed Co. Ltd., Amin Court 62-63, Motijheel, Bangladesh. Seed Sprouting: Seeds selected by specific gravity method were immersed in water in a bucket for 24 hours. These were then taken out of water and kept tightly in gunny bags. The seeds started sprouting after 48 hours which were suitable for sowing in 72 hours. Preparation of seedling: Sprouted seeds were sown as broadcast in 16 portable trays for 16 varieties containing soil and cow dung. Thin plastic sheets were placed at the base of trays to protect water loss. Trays were kept inside a room at night to protect the seedlings from freezing temperature of season and kept in sunlight at daytime for proper development of seedlings. Seed Sowing: Seeds were sown in the portable trays on December 27, 2011. Fertilization on the main field Plot was fertilized with 110, 90, 76, 60, 7 kg ha-1 Urea, TSP, MP, Gypsum and Zinc Sulphate respectively. The entire amounts of TSP, MP, Gypsum and Zinc Sulphate were applied as basal dose at final land preparation. Urea was top-dressed in three equal installments viz. after seedling recovery, vegetation stage and 7 days before panicle initiation. Uprooting and transplanting of seedlings: 12 days old seedlings were uprooted from the trays and transplanted on January 7, 2011. The trays were brought to main field and seedlings were planted in prepared plot just after uprooting and this process was completed within one minutes. Application of irrigation water Alternate wetting and drying of crop field is desired in SRI method. Water level should be dried in such a level that hairline cracks should develop in field. Irrigation must be applied to such amount that field remains moist but not fully submerged. Field was allowed to dry for 4 to 5 days during panicle initiation period for better root growth that increases tillering. From panicle initiation (PI) to hard dough stage, a thin layer of water (2-3 cm) was kept on the plots. Again water was drained from the plots during ripening stage. Data collection: Data were collected on growth, development and yield characters. Among these, leaf area index were estimated. Statistical Analysis:All the collected data were analyzed following the analysis of variance (ANOVA) technique using MSTAT-C package and the mean difference were adjusted by LSD technique.
Sci. Agri. 11 (2) : 81-89 (2015)
Journal