Author(s): JS Sudha Rani, B Sreedevi, KP Vani, M Venkata Ramana, PC Latha and M Yakadri

Abstract: A field study was taken up to evaluate the influence of organic sources of nutrients and fertility levels in aerobic rice during kharif 2017 and kharif 2018 at Indian Institute of Rice Research, Rajendra Nagar, Hyderabad. The experiment was laid out in split plot design with three replications. The treatment comprised of M 1: Neem leaf manure @ 6 t ha -1; M 2 : Vermicompost @ 2 t ha -1; M 3 : Goat manure @ 5 t ha -1 ; M 4 : Microbial consortia [seed treatment @ 4g kg -1 + soil application @4 kg ha -1] and four subplots with graded doses of fertilizers viz; S 1 :Control; S 2 :50% RDF; S 3 :75% RDF and S 4 :100% RDF (120-60-40). It was observed that higher plant height, dry matter production and tillers m -2 were recorded under M 2 [vermicompost 2 t ha -1] followed by M 3 [goat manure 5t ha ha -1]. Among the graded doses of fertilizers S 4 :100% RDF recorded taller plants, drymatter production and tillers m -2 followed by S 3 :75% RDF and shorter plants, lowest drymatter production and tillers m -2 were recorded under control treatment(S 1 : 0% RDF). Higher panicle length (25.6), panicle weight (3.4), total grains per panicle (125) and filled grains per panicle (116) under M 2 [vermicompost 2 t ha -1], followed by M 3 : Goat manure @ 5 t ha -1 ( panicle length -25.3, panicle weight - 3.3, total grains per panicle - 125 and filled grains perpanicle-114.), and among the graded doses of fertilizers S 4 :100% RDF recorded higher panicle length (26.6), panicle weight (3.4), total grains per panicle (126)and filled grains per panicle (119) followed by S 3 : (75%RDF) with panicle length- 25.3 cm, panicle weight - 3.1g, total grains per panicle - 124 and filled grains per panicle -113 and lowest panicle length (22.7 cm), panicle weight (2.8 g), total grains per panicle (103) and filled grains per panicle (84) were recorded under control (S 1 : 0%). M 2 treatment [vermicompost 2t ha -1] accrued higher grain yield of 4248 kg ha -1 which was statistically at par with M 3 (4141 kg ha -1). Lowest grain yield of 3066 kg ha -1 was obtained with M 1 (neem leaf manure 6t ha -1).100% RDF (S 4) yielded 4712 kg ha -1 followed by 75% RDF (S 3). The highest straw yield (5374 kg ha -1) was obtained with M 2 (vermicompost 2t ha -1) followed by M 3 (Goat manure 5 t ha -1) (5268 kg ha -1). S 4 (100%) RDF produced the highest straw yield of 5894 kg ha -1 followed by S 3 (5530 kg ha -1).

DOI: 10.22271/maths.2023.v8.i6Sj.1458

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