Response of different duration varieties of rice (Oryza sativa) on growth, yield attributes and yield under varied levels of nutrient application

P. VIJAYKUMAR; N. PANDEY; R. MAHENDER KUMAR

doi:10.59797/ija.v64i4.5302

Authors

P. VIJAYKUMAR
N. PANDEY
R. MAHENDER KUMAR

DOI:

https://doi.org/10.59797/ija.v64i4.5302

Keywords:

Different durations, Fertilizers, Nutrient management, Rice, Varieties

Abstract

A field experiment was conducted during the rainy season (kharif) 2017 on clay soils, of the ICARIndian Insti- tute of Rice Research, Hyderabad, Telangana, to study the response of different duration rice (Oryza sativa L.) va- rieties as influenced by varied levels of nutrients under irrigated ecology. The experiment comprised rice varieties of 3 different durations where under each duration there were 2 varieties, viz. short duration of 110 days ('DRR- Dhan 44' and 'DRR-Dhan 46'), medium duration of 125 days ('MTU 1010' and 'Vardhan') and long duration of about 145 days ('Sugandhamti' and 'Swarnadhan') with 3 nutrient levels [50%, 100% and 150% recommended dose of fertilizer (RDF)] were tested in split-plot design with 3 replications. The variety 'Swarnadhan' produced sig- nificantly higher number of tillers, total dry matter and leaf-area index; however, the plant height was highest with the variety 'Sugandhamati' but it was at par with 'Swarnadhan'. The variety 'Varadhan' produced significantly higher number of grains/panicle, 1,000-grain weight, weight of the panicle and produced lower sterility percentage. Thus, it gave the highest grain yield (6.49 t/ha). The plant height, number of tillers/plant, leaf-area index and dry matter accumulation increased significantly with the application of 150% RDF (N : P O : K O 180 : 90 : 60 kg/ha) 2 5 2 as compared to 100% or 50% RDF. The results showed, increased rate of nutrients application that increased growth and yield of improved varieties.

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