KC Roy
AEO, Dept. Agricultural Extension, Dhaka
MM Rahman
SO
Pulses Research Sub-Station BARI, Gazipur4
KAMM Rahman
SSO
Tuber Crop Research Center BARI, Gazipur
MAM Miah
SSO
IAPP Regional Agricultural Research Station, BARI Rangpur
A Hossain
SO
Seed Tech. Division, BARI, Gazipur
MAU Zaman
SO
Rice Farming System Division, BRRI, Gazipur
Rapeseed, Irrigation, Sulphur, Yield, Oil content
Agronomy Field of Sher-e-Bangla Agricultural University
Crop-Soil-Water Management
The experiment was conducted in the Modhupur Tract under Agro-Ecolological Zone 28 (AEZ-28). Experimental site was Sher-e-Bangla Agricultural University, Dhaka (90.2ON latitude and 23.50E altitude) lies at an elevation of 8.2 m above the sea level. The terrace soils of Dhaka belongs to Tejgaon series under the agro ecological zone Madhupur Tract and texture is silty loam. The variety SAU SR-12 isa high yielding line (F12 progeny of SS-75 X Tori-7) under brown sarson group of Brassica campestris. Soil samples (0-20 cm), before initiation of the experiment,was analyzed for soil pH (Jackson, 1973), organic matter (Nelson and Sommers,1982), total N (Bremner and Mulvaney, 1982), exchangeable K (Pratt, 1965), available P (Olsen & Sommers, 1982), available S (Foxet al.,1964) and available B (Page et al., 1982). The experiment was laid in a split plot design with three replications. Irrigation treatments were imposed to the main plots and S treatments to the sub plots. Total number of main plots was 9 (3x3) and subplots was 27 (9x3). The unit subplot size was 6m2 (4.0 m x 1.5 m). The distance among the main plots was 1m and among the subplots 0.5m. The land was prepared thoroughly by country plough followed by laddering. Three irrigation treatments were I1= no irrigation (control), I2= one irrigation at 53 DAS, I3= two irrigation at 25 and 53 DAS at per treatment. Three S fertilizer treatments in the experiment were S1= 15 kg Sha-1, S2= 30 S kgha-1, S3= 45 kg S ha-1. Fertilizers were used as urea, TSP, MP, gypsum and boric acid to supply N, P, K, S and B, respectively. Seeds were sown on 12 November 2013. Ten mature plants were randomly selected from each plot on each replication for recording data on plant height (cm), number of branches plant-1, pod length (mm), siliquae plant-1, seed siliqua-1 ,grain yield (t ha-1), oil content and N, protein, K, P, S, B content in rape seed plant. Oil content of seed was determined by Soxhlet method and expressed in percentage (%), N contentwas determined by Kjeldahl method (Ranganna,1998), S content of plant extract by turbidometric method with the help of a spectrophotometer, set at 420 nm (Wolf, 1982), phosphorus content (diacid mixture extract) determined colorimetrically by ascorbic acid blue colour method at 660 nm (Olsen el al 1954), potassium (K) content (diacid mixture extract) by the help of the flame emission spectrophotometer. The samples were aspirated into a gas flame (Ghosh et al.,1983). Total N of each sample was estimated by the Macro kjeldahl method (PCARR, 1980). The data obtained from the experiment were analyzed statistically to find out the significance of the difference among the treatments. The mean values of all the characters were evaluated and analysis of variance was performed by the F (variance ratio) test. The significance of the differences between means was estimated by Least Significant Difference Test (LSD) at 5%.
Eco-friendly Agril. J. 10(03):30-34, 2017 (March)
Journal