Author(s):

Polagani Nagarjuna, RS Singh and Mohan Babu YN

Abstract: A field experiment entitled “Influence of fertilizer levels and weed management practices on growth and yield of hybrid rice” was conducted during the kharif season of 2017 at the Research Farm, TCA, Dholi, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur (BIHAR). The experiment was laid out in split-plot design with twelve treatments. The results revealed that there was a significant difference in various plant growth parameters at harvest like plant height (112.78 cm), number of tillers/m² (317.22), plant dry matter (1291.80 g/m²), crop growth rate (6.27 g/m²/day 90 DAT-at harvest) and yield parameters i.e. the number of panicles (213.05/m²), length of panicle (29.30 cm), number of spikelets/panicle (224.16) and test weight (22.82 g), grain yield (62.35 q/ha) and straw yield (88.00 q/ha) recorded highest with hand weeding twice (20 and 40 DAT) which was found statistically at par with Bispyriback sodium @ 25 g /ha + Pyrazosulfuron @25 g/ha at 20 DAT and significantly superior over rest of the treatments. Among fertilizer levels, growth parameters at harvest i.e. plant height (112.67 cm), number of tillers/m² (315.83), plant dry matter (1180.49 g/m²) and yield parameters i.e. the number of panicles (208.33/m²), length of panicle (28.91 cm), number of spikelets/panicle (229.52) and test weight (22.77 g), grain yield (55.73 q/ha) and straw yield (78.36 q/ha) were recorded highest with the application of 150% RDF, which was found statistically at par with 125% RDF and significantly superior over 100% RDF.

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