Evaluating the Role of Fertilizer and Seed Soaking on Direct Seeded Aus Rice Varieties

Sushan Chowhan* and Kamrun Nahar

Bangladesh Institute of Nuclear Agriculture (BINA), Bangladesh

*Corresponding Author: Sushan Chowhan, Adaptive Research and Extension Division, Bangladesh Institute of Nuclear Agriculture (BINA), Bangladesh.

Received: December 14, 2021; Published: January 12, 2022

Abstract

Using conservation agriculture strategies is time demanding as intensive crop cultivation has already been started to feed the ever-growing population. Rice requires extensive resources for production. To preserve agroecosystem and sustain rice production it is imperative to consider soil and environmental health. Direct seeded rice (DSR) is a promising technology for rice cultivation which needs less input and resources. Aus season of Bangladesh is highly favorable for DSR cultivation. Being a new technology, farmers’ lack enough information and knowledge on production technology of direct seeded aus rice. Taking into account, the present investigation was implemented to assess the response of some modern aus varieties, fertilizer doses and seed soaking methods on the yield attributes under DSR. The experiment was laid in factorial RCBD. Three factors considered in the experiment were- variety, fertilizer dose and seed soaking. Rice varieties chosen were Binadhan-19 (V₁), Binadhan-21 (V₂), BRRI dhan-82 (V₃) and BRRI dhan-85 (V₄). Fertilizer doses (% of recommended) were 80% NPKSZn (T₁), 100% NPKSZn (T₂) and 120% NPKSZn (T₃). Seed soaking methods were dry seeds directly sown without any soaking (S₀) and seeds sown after hydro soaking for 24 hrs (S₂₄). Data on yield and morpho physical attributes were collected randomly from five hills at final harvest. Outcomes revealed, longest panicle in V₃ × T₁ × S₂₄ (27.14 cm), treatment V₄ × T₁ × S₀ had most filled grains (236.96) and V₄ × T₂ × S₀ had least amount of filled grains (101.24) per panicle. Highest grain sterility was observed with V₂ × T₃ × S₀ (48.17%) and the lowest with treatment V₄ × T₁ × S₀ (27.40%). Lightest thousand grain weight (TGW) was found in V₂ × T₂ × S₂₄ (19.59g); whereas, it was 17.45% more in treatment V₁ × T₂ × S₂₄ (23.73g). Grain yield was maximum with treatment combination V₄ × T₁ × S₀ (4.78 t/ha) followed by a 7.17% reduction in V₂ × T₃ × S₀ (4.46 t/ha) and 64% decrease with V₄ × T₃ × S₂₄ (1.72 t/ha). Late harvesting was seen in V₄ × T₃ × S₂₄ (112.67 days); while V₁ × T₂ × S₀ was the earliest (95.00 days). Above findings imply that, BRRI dhan85 and Binadhan-21 might be better with yields in dry-DSR without soaking; but balanced use of fertilizers should be ensured in order to avoid higher grain sterility and yield reduction.

Keywords: Direct Seeded Rice; Aus; Binadhan; Seed Soaking; Hydro Soaking; Fertilizer Management

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Citation

Citation: Sushan Chowhan and Kamrun Nahar. “Evaluating the Role of Fertilizer and Seed Soaking on Direct Seeded Aus Rice Varieties". Acta Scientific Agriculture 6.2 (2022): 02-17.

Copyright

Copyright: © 2022 Sushan Chowhan and Kamrun Nahar. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.