Abstract
Performance of salt-tolerant Boro rice was investigated under the interaction effect of variety and different doses of potassium fertilizer, which is a part of the research for developing agriculture in coastal areas of Bangladesh. A field experiment was conducted at the research field of Agriculture department, Noakhali Science and Technology University (NSTU), Noakhali-3814. The experiment was carried out in a Randomized Complete Block Design (RCBD) with three replications where two varieties viz. BINA dhan-8, BRRI dhan-28 and three doses of potassium viz. 120 kg/ha, 84 kg/ha and 36kg/ha were used as treatments. Plant height (cm), tillers/hill, grain/panicle, 1000 grain weight (g), grain yield (t/ha), straw yield (t/ha) and harvest index (%) were compared among varieties and treatments. Results revealed that only variety and only potassium fertilizer had non-significant influence but the interaction of variety and potassium fertilizer had a significant effect on the performance of salt-tolerant Boro rice. Therefore, the present study suggests that salt-tolerant BINA dhan-8 variety may be cultivated with 120 kg potassium/ha for obtaining higher yield in the southern coastal area of Bangladesh.
 Asian Australas. J. Biosci. Biotechnol. 2020, 5 (1), 21-26
Highlights
Agriculture is the most important sector of the Bangladeshi economy that contributes more than 15% to the national GDP (Gross Domestic Product) and provides employment opportunities for 43% of the total population
Sarker et al (2013) reported shorter plant height in Bangladesh Rice Research Institute (BRRI) dhan-28 among different varieties of boro rice which is similar to our result
BRRI dhan-28 (15.71) produced more tiller/hill than Bangladesh Institute of Nuclear Agriculture (BINA) dhan-8 (13.99) and the result is consistent with some other researcher (Tyeb et al, 2013; Sarker et al, 2013; Islam et al, 2015) BRRI dhan-28 (117.33) had less grain/panicle compare to BINA dhan-8 (121.47)
Summary
Agriculture is the most important sector of the Bangladeshi economy that contributes more than 15% to the national GDP (Gross Domestic Product) and provides employment opportunities for 43% of the total population. The Rice sector contributes one-half of the agricultural GDP and one-sixth of the national income in Bangladesh (BBS, 2018). Bangladesh is one of the most important rice-growing countries of the world. In Bangladesh, rice is the most important leading cereal crop. Sufficient production of rice is the main way to ensure food security in Bangladesh. According to BBS, 2016 the total cultivated area of rice per year is 15.03 million hectares and total production per year about 38.34 million metric tons in Bangladesh. 79 percent of the total cropped area is covered by rice in Bangladesh (BBS, 2015). Boro rice alone provides about 56% of total food grains and highest in productivity (3.965 metric tons per hectare) compared to Aus rice and Aman rice (BBS, 2015).
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