S. K. Paul
Department of Agronomy, BAU, Mymensingh - 2202, Bangladesh
M. A. R. Sarkar
Department of Agronomy, BAU, Mymensingh - 2202, Bangladesh
M. Ahmed
Department of Agronomy, BAU, Mymensingh - 2202, Bangladesh
Row arrangement, Tiller seperation time, Tiller kept/hill, Yield, Yield component and transplant aman rice
Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh
Crop-Soil-Water Management
The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from June to December 1998. The land was medium high with sandy loam texture having pH 5.9-6.5.
BR23 (Dishari), a modern variety of transplant aman rice, was used as the test crop in experiment. The experiment consisted of three levels of row arrangements viz., a) single row (row spacing 25 cm), b) double row (row spacing 25-10-25 cm), c) triple row (row spacing 25-10-10-25 cm); two times of tiller separation viz., a) 25 days after transplanting (DAT). b) 35 days after transplanting (DAT) and three levels of number of tillers kept hill-1 a) 2 tillers hill-1, b) 4 tillers hill-1 and c) intact hills.
The experiment was laid out in a split-plot design with row arrangements in the main plots and combination of time of tiller separation and number of tillers kept hill-1 in the sub-plots. The treatments were replicated thrice. Area of each unit plot was 4.0 m x 2.5 m. Forty days old seedlings were uprooted from the nursery bed and were transplanted on 1st August 1998 with two seedlings hill-1.
The land was fertilized with 90-70-50-25-6 kg ha-1 of N-P2O5-K2O-S-Zn in the form of urea, triple super phosphate, muriate of potash, gypsum and zinc sulphate, respectively. The entire amount of triple super phosphate, muriate of potash, gypsum and zinc sulphate were applied at final land preparation. Urea was top dressed in three equal instalments at 10, 30 and 50 DAT (panicle initiation stage).
The crop was properly weeded and irrigated whenever necessary. Sumithion @ 400 ml acre-1 was applied to control green leaf hopper. At maximum tillering stage sheath blight was successfully controlled by proper drainage and applying Tilt (25 EC) @ 400 ml acre-1 at 10 day intervals.
Five hills were randomly selected in each unit plot excluding border rows to record the data on plant characters and yield components. Harvesting was done on 20 December 1998. The harvested crop was then threshed, cleaned and sun dried to record the grain yield plot-1, which was finally converted to ha-1 at 14% moisture basis.
Journal of Agronomy, 1: 9-11, 2002; ISSN 1680-8207
Journal