AHM Motiur Rahman Talukder
PhD Fellow, Department of Agronomy and Haor Agriculture, Sylhet Agricultural University, Bangladesh
M Biswas
Professor, Jashore University of Science & Technology, Jashore-7408, Bangladesh
MNH Miah
Professor, Sylhet Agricultural University, Sylhet-3100, Bangladesh
MA Kashem
Professor, Sylhet Agricultural University, Sylhet-3100, Bangladesh
Lutfun Nahar
Scientific Officer, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh
Siliquae maturity, Plant establishment, Growth, Yield, Rapeseed-mustard.
Regional Agricultural Research Station, Jamalpur, Bangladesh during the period from November 2015 to March 2016
Crop-Soil-Water Management
The experiment was conducted at the Regional Agricultural Research Station, Jamalpur during the rabi (winter) season from November 2015 to March 2016 to observe the growth and yield performances of the rapeseed-mustard varieties grown from the seeds collected from the crop of different stages of siliquae maturity of the previous season research. The geographic coordinates of the research area located between 240 34' and 250 26' North latitude and between 890 40' and 900 12' East longitude. Soil samples of 0-15 cm depth were taken prior to sowing of seeds to analyze the physical and chemical properties. All the elements were found above the critical values. Physical and chemical properties of initial soil samples (0-15 cm depth) of the research plot of Regional Agricultural Research Station, Jamalpur The treatments of the experiment comprised four rapeseed-mustard varieties viz. V1 = BARI Sarisha-11, V2 = BARI Sarisha-14, V3 = BARI Sarisha6 and V4 = Tori-7 and four seed sources viz. seeds were collected from field experiment of previous rabi season 2014-2015 of the above-mentioned rapeseed-mustard varieties considering four stages of siliquae maturity i.e. at H1 = Green siliquae stage harvested seed (BARI Sarisha-11, BARI Sarisha-14, BARI Sarisha-6 and Tori-7 were harvested at 87, 66, 81 and 65 days after sowing), H2 = Pale yellow siliquae stage harvested seed (BARI Sarisha-11, BARI Sarisha-14, BARI Sarisha-6 and Tori-7 were harvested at 98, 75, 90 and 74 days after sowing), H3 = Golden yellow siliquae stage harvested seed (BARI Sarisha-11, BARI Sarisha14, BARI Sarisha-6 and Tori-7 were harvested at 104, 85, 99, 85 days after sowing) and H4 = Full maturity siliquae stage harvested seed (BARI Sarisha-11, BARI Sarisha-14, BARI Sarisha-6 and Tori-7 were harvested at 109, 89, 102 and 89 days after sowing). Collected seeds from different stages of siliquae maturity were stored in airtight plastic polythene under freezing condition before setting up of the experiment. To initiate the field experiment the land was opened on 28 October 2015 with a tractor-drawn disc plough followed by disc harrowing. One week later, the land was harrowed, ploughed and cross ploughed several times by power tiller and laddering was done to attain a good tilth. All weeds, stubbles and crop residues were removed from the experimental field. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The unit plot size was 3m × 4m. The distances between plot to plot and replication to replication were 1m and 1.5m, respectively. As per treatment seeds of four rapeseed mustard varieties collected from four stages of siliquae maturity were sown in furrows under good tilth condition. Before sowing seeds were treated with Provax-200 @ 2.5 g powder for kg-1 seed. Seeds were sown continuously in line according to treatments @ 7.0 kg seeds ha-1 at normal joe condition of soil on 3 November 2015. Germination test of the seeds was also performed variety wise in the laboratory before sowing in the field and average 86%, 97%, 99%. 99% germination was found at H1, H2, H3 and H4 stages of harvest in the previous season respectively. After sowing, the seeds were covered with soil and lightly pressed by hand. For uniform germination, light irrigation was given in the furrows before sowing of seeds. The line to line distance was 30 cm and the number of lines in each plot was ten. Soil Test Based (STB) fertilizer dosages were applied in the crop field [4]. Fertilizers were applied for BARI Sarisha-11 and BARI Sarisha-6 at the rate of 132-14-87-15-0.71-0.7 kg ha-1 N-P-K-S-Zn-B, for BARI Sarisha-14 and Tori7 at the rate of 99-10.6-58-8.71-0.48-0.7 kg ha-1 N-PK-S-Zn-B respectively through urea, triple superphosphate, muriate of potash, gypsum, zinc sulphate and boric acid respectively. Half urea and all other fertilizers were applied as basal during final land preparation. The remaining urea was top-dressed at 22 days after the emergence of seedlings. Two irrigations were applied at the flower initiation and siliquae development stages of the crop. Weeding and thinning were done at 5-7 days after first irrigation at joe condition. During crop growing period different phenological parameters viz. days to emergence, days to the first flower, days to 50% flower, days to 50% siliquae initiation and days to harvest; plant growth parameters viz. plant height (cm) and above-ground dry matter accumulation (g m-2 ) from 20 DAS to harvest at 20-day intervals were recorded. Prior to harvest, ten plants from each plot were collected randomly to record data on yield contributing parameters as well as morphological parameters like siliqua length. To record seed and stover yield, plants of the whole plot were harvested at the full maturity stage of the crop. The harvested plants were dried in the field plot-wise, then threshed and cleaned. The cleaned seeds were dried in the sun for 2-3 days and weighed separately. Dried straw weight was also taken plot-wise. Finally, seed and stover yields were converted into t ha-1 basis. The collected data on each plot were statistically analyzed to obtain the level of significance using the computer-based software MSTAT-C [5]. Mean differences among the treatments were tested with Least Significant Difference (LSD) test at 5% level of significance.
Sch. Bull., Vol-4, Iss-7 (Jul, 2018): 585-595
Journal