EFFECT OF ROW SPACING AND DATES OF TRANSPLANTING ON YIELD PERFORMANCE OF KASALATH RICE MUTANT IN T. AMAN SEASON OF BANGLADESH
Proper time of transplanting and appropriate spacing are necessary for standardization the yield potential of advance kasalath rice mutants in Bangladesh climatic condition.Thefield experiments were conducted at BINA Headquarters farm, Mymensingh in T. Amanseason of 2017 and 2018 to see the performance of two mutant lines of Kasalath under different dates of transplanting and spacings. In 2017, two advanced mutant lines namely RM-Kas-60(C)-1, RM-Kas-80(C)-1were evaluated along with BRRI dhan49 at three levels of spacing, viz. 20cm×15cm, 20cm×20cm and 20cm×25cm. Mutant line RM-Kas-60(C)-1 produced statistically higher grain yield (4.8 t ha-1) at 20cm×15cm spacing. In 2018, only RM-Kas-60(C)-1 was evaluated against Binadhan-11, at three row spacing (viz. 20cm×15cm, 20cm×20cm and 20cm×25cm) and three dates of transplanting such as July 15, July 30 and August 15. Among three transplanting dates, RM-Kas-60(C)-1 produced the highest grain yield of 4.86 t ha-1 at 20cm x 15cm spacing when transplanted on July 30. Overall observation showed that RM-Kas-60(C)-1 yielded the best at 20cm×15cm when transplanted on July 30 under rainfed condition of Bangladesh.
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