Assessment of High-yielding Rapeseed-mustard Varieties in Haor (Wetland) Ecosystem for Development of Mustard-Boro Rice-Fallow Pattern in Sylhet Region of Bangladesh

Aims: To assess the suitability of short duration high yielding rapeseed-mustard variety(s) cultivation in the haor (wetland) areas.

Study Design: Randomized complete block (RCB).

Place and Duration of Study: Farmers’ field of Lalakhal, Jaintapur Upazila of Sylhet, Bangladesh during November 2014 to February 2015.

Methodology: The treatments included in the experiment were seven rapeseed-mustard varieties viz. i. Tori-7, ii. BARI sarisha-13, iii. BARI sarisha-14, iv. BARI sarisha-15, v. BARI sarisha-16, vi. advanced line Nap-205 and vii. BINA sarisha-4. Design of the experiment was randomized complete block (RCB) with three replications.

Results: The results revealed that BARI sarisha-16 produced the highest seed yield (1.99 t ha-1), but it took the maximum days (92) to maturity. The variety BARI sarisha-15 produced the second highest seed yield (1.78 t ha-1) closely followed by BINA sarisha-4 (1.75 t ha-1) and BARI sarisha-13 (1.68 t ha-1). The lowest seed yield (1.53 t ha-1) was obtained from the variety Tori-7 which was statistically similar to that of BARI sarisha-14 (1.59 t ha-1) and Nap-205 (1.68 t ha-1). Tori-7 took the minimum days (74.7) to maturity while BARI sarisha-15 took 77.7 days.

Conclusion: Variety BARI sarisha-15 could be a good option for haor areas for cultivation in medium low land before Boro rice after recession of rainwater, as it took less duration to maturity (77.7 days) with good seed yield (1.78 t ha-1).