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Subject: Agronomy × Author: Archana Kumari × End date: 2009 × Start date: 2004 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Evaluation of hybrid varieties of mustard (Brassica juncea L.) under different sowing time and spacing
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2009-09) Archana Kumari; Singh, R.P.
    A field experiment was conducted during the Rabi season of 2007-08 and 2008-09 at the Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand. The experiment was laid out in split- split- plot design with three replications by taking sowing dates (October 10, October 20 and October 30 ) in main plot, varieties (Kranti, NRCHB-506 and DMH-1) in sub plots and spacing (30 cm x10 cm, 45 cm x10 cm and 60 cm x10 cm ) in sub-sub- plots. The soil of the experimental field was loam in texture with pH 7.5, organic carbon 0.90%, available N 236 kg/ha, available phosphorus 21 kg/ha and available potassium 306 kg/ha. October 10 sown crop recorded significantly higher seed yield/ha during both the years. Beyond October 10, delay in sowing by 10 days upto October 30 caused significant reduction in seed yield. In both the years hybrid DMH-1 had significantly highest seed yield followed by hybrid NRCHB-506 and variety Kranti. Closer spacing of 30 cm x 10 cm recorded significantly higher seed yield over 60 cm x 10 cm during both the years but remained at par with 45 cm x 10 cm in 2007-08. Early sowing caused significantly higher N, P and K uptake as compared to delayed sowing. Hybrid DMH-1 recorded significantly higher N, P and K uptake by seed and stover followed by hybrid NRCHB-506 during both the years. Closer spacing 30 cm× 10 cm recorded significantly higher N, P and K uptake over other two spacings. Oil content was influenced significantly by sowing dates only during both the years. Seed oil content was the maximum in October 10 sown crop during both the years. Varieties and spacings had non-significant effect on oil content. However higher oil content was recorded in hybrid NRCHB-506 and spacing 60 cm x 10 cm. Dry matter accumulation per plant at 60 DAS as well as at harvest, total branches per plant at harvest, number of siliquae per plant, 1000-seed weight and seed weight per plant had significant positive correlation with seed yield during both the years. The findings of this investigation suggested that October 10 was the optimum sowing time for newly developed hybrids of mustard. Hybrid DMH-1 was the best in terms of seed and oil yield followed by NRCHB-506, and thus, may be promoted for cultivation. These hybrids should be sown at spacing of 30 cm × 10 cm or 45 cm × 10 cm for realizing their yield potential.