M.A. AZIZ
Sylhet Agricultural University,Sylhet 3100, Bangladesh.
M.S. HOSSAIN
Sylhet Agricultural University,Sylhet 3100, Bangladesh.
M.J. UDDIN
Department of Soil, Water and Environment, University of Dhaka,Dhaka‐1000, Bangladesh
Organic fertilizer, Growth and yield, Rice
Farmer’s field, Tukerbazar, Sylhet
Crop-Soil-Water Management
Two experiments were conducted at farmer’s field, Tukerbazar, Sylhet during T. Aman season, 2011 and Boro season, 2012. The initial soil properties of the experimental site is presented in Table 1. Soil texture, pH, organic matter, available P, S, Zn and exchangeable K were determined following standard methods(4?8). The elemental composition of Northern Bio Fertilizer (NBF) was N = 6.48%, P = 4.56%, K = 1.2%, S = 3.36%, Zn = 0.40%, and B = 0.10% where as in Northern Shakti, N = 6.0%, P = 3.5%, K = 8.5%, S = 2%, Ca = 2%, Mg = 1% and B = 0.10%. The following nine treatment combinations were tested in T. Aman season : T1 = Control, T2 = Northern Jaibo?Sar (NJS) @ 500 kg/ha, T3 = STB (Soil Test Based), T4 = T2 + NBF @ 250 kg/ha + Recom. N, T5 = T2 + 50% STB, T6 = T2 + 60% STB, T7 = T2 + 70% STB, T8 = T2 + 80% STB and T9 = T2 + T3. The experiment was laid out in a RCBD with three replications having unit plot size of 6 m × 5 m. Fertilizer doses on STB were 77 kg N, 18 kg P, 36 kg K and 13 kg S/ha and was applied as urea, TSP, MP and gypsum, respectively. BRRIdhan 31 was used as test crop. Thirty?day?old 2 ? 3 seedling/hill were transplanted with 20 cm × 20 cm spacing. During Boro season, the same nine treatment combinations were tested except treatment T4. The treatment T4 was as NJS @ 500 kg/ha + Northern Shakti @ 500 kg/ha + Recom. N. Fertilizer doses on STB were 115 kg N, 30 kg P, 56 kg K and 23 kg S/ha and was applied as urea, TSP, MP and gypsum, respectively. BRRIdhan 29 was used as test crop. Fifty day old 2?3 seedling/hill were transplanted with 20 cm × 20 cm spacing. TSP, MP, Gypsum and Northern Jaibo?Sar were applied at final land preparation. Urea was applied into three equal splits, 1/3 basal, 1/3rd maximum tillering stage and the remaining 1/3rd at panicle initiation stage. Necessary intercultural operations were done as and when required. At maturity, the crop was harvested from 5 m2 area for grain and straw yield and grain yield was adjusted to 14% moisture content. The plant height, tiller, panicle production, grain and straw yield were recorded. Finally economic analyses were done for net benefit and marginal rate of return.
Dhaka Univ. J. Biol. Sci. 23(2): 173-178, 2014 (July)
Journal