Nitrogen scheduling in different cultivars of basmati rice under direct seeding conditions
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Date
2017
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CCSHAU
Abstract
The investigation entitled “Nitrogen scheduling in different cultivars of basmati rice
under direct seeding conditions” was carried out at Regional Research Station, Karnal of
Chaudhary Charan Singh Haryana Agricultural University, Hisar during kharif season of
2014 and 2015. The experiment was laid out in split plot design with three replications. The
treatments included four basmati rice cultivars viz. PB-1121, PB-1509, PB-1 and HB-2 as
main plots. Sub plot treatments included N at 90, 100 and 110 kg ha-1 with 3 splits (0, 15 and
50 DAS) or 4 splits (0, 20, 40 and 60 DAS) of application with 11.5 kg N ha-1 as basal dose
and remaining in equal splits. Cultivar HB-2 recorded highest growth parameters, yield and
yield attributes which was statistically at par with PB-1121 but superior than PB-1 and PB-
1509. The plant height, dry weight accumulation, CGR, LAI, LAD, number of effective
tillers, grains/panicle and grain yield of all the basmati rice cultivars increased with increase
in N levels and number of splits. The grain yield at 110 kg N ha-1 with 4 splits (49.8 q ha-1)
increased by 18 % over 90 kg N ha-1 with 3 splits (42.2 q ha-1). The maximum total N uptake
(82.4-82.6 kg ha-1), P (26.3-27.8 kg ha-1) and K (120.5-125.2 kg ha-1) was recorded with 110
kg N ha-1 in 4 splits. Maximum net returns (Rs.18547-Rs.19948) and B-C ratio (1.23-1.25)
was recorded with 110 kg N ha-1 with 4 splits. Application of 110 kg N ha-1 in 4 splits at 0,
20, 40 and 60 DAS was found to be the best N schedule for these basmati cultivars.