Morpho-physiological and yield attributes of boro rice varieties as influenced by different nitrogen sources

Research in Agriculture Livestock and Fisheries Pub Date : 2023-09-18 DOI:10.3329/ralf.v10i2.68776

None Parvin Akter Bithy

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Abstract

The present study was carried out at the Research Field of Sher-e-Bangla Agricultural University (SAU), Dhaka during Boro season, 2021-2022 to discover the best nitrogen source for enhancing Boro rice grain production. The experiment consisted of two factors: A) Three varieties: BRRI dhan29 (V1), BRRI dhan58 (V2), and Heera (V3). B) Four nitrogen sources: no nitrogen (T1), BRRI-recommended prilled urea (T2), recommended dose of mixed NPK (T3), and BARC-recommended USG (T4). The experiment was laid out in split plot design with three replications where main plot was for nitrogen source and subplot was for variety. USG treatment resulted in the highest grain production (8.6 t/ha) and the lowest percentage of spikelet sterility of any nitrogen source tested. Except for harvest index, all of the examined characteristics differed considerably between types. This is mostly due to BRRI dhan29 having the maximum number of full grains (98.8/panicale) and a significantly lower degree of spikelet sterility (7.3%). Among the interaction effects, the combination of the USG application with BRRI dhan29 showed the greatest performance in terms of delivering the maximum grain production (9.3 t/ha) by significantly reducing spikelet sterility. Res. Agric. Livest. Fish. Vol. 10, No. 2, August 2023: 175-182

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不同氮源对水稻形态生理及产量性状的影响

本研究于2021-2022年在达卡的Sher-e-Bangla农业大学(SAU)研究基地进行，旨在发现提高米粒产量的最佳氮源。试验包括两个因素:A) BRRI dhan29 (V1)、BRRI dhan58 (V2)和Heera (V3)三个品种。B) 4种氮源:无氮(T1)、brri推荐的颗粒尿素(T2)、混合NPK推荐剂量(T3)和barc推荐的USG (T4)。试验采用3个重复的分区设计，主区为氮源区，次区为品种区。在所有氮源中，USG处理的籽粒产量最高(8.6 t/ hm2)，小花不育率最低。除收获指数外，各类型间各性状差异较大。这主要是由于BRRI dhan29具有最大的全粒数(98.8粒/穗)和显著较低的小穗不育程度(7.3%)。在互作效应中，USG与BRRI dhan29组合施用表现最好，通过显著降低小穗不育性，实现最大产量(9.3 t/ hm2)。阿格利司》。力所能及的。鱼。第10卷第2期，2023年8月:175-182

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来源期刊

Research in Agriculture Livestock and Fisheries

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6 weeks