Enhancing Nitrogen Use Efficiency in Kharif Sorghum (Sorghum bicolor)

A field experiment was conducted on improving nitrogen use efficiency through split application of nitrogen in rainfed kharif sorghum (Sorghum bicolar (L.) Moench) at AICRP on Sorghum, Main Agricultural Research Station, Dharwad-Karnataka-India during kharif 2014. The experiment was laid out in split plot design with fourteen treatment combinations and three replications. The treatment consisted of two genotypes as main plots and seven methods of split application of nitrogen as sub plot. Among the genotypes DSV-6 recorded significantly higher plant height (225.2 cm), leaf area index (3.14), leaf area duration (114.77 days), total dry matter production (237.28 g plant-1), grain weight ear-1(100.59 g), number of grains ear-1(4376), nitrogen use efficiency (59.36 kg kg-1), grain yield (5937 kg ha-1), fodder yield (9.09 t ha-1), net returns ( 33241 ha-1) and B:C ratio (1.86). Split application of nitrogen @ 50 % N at sowing + 25 % N at 30 DAS + 25 % N at boot leaf stage recorded significantly higher plant height (196.4 cm), leaf area index (3.51), leaf area duration (95.50 days), total dry matter production (220.48 g plant-1), grain weight ear-1(99.56 g).

Autorentext
Mr. Ravi M. Khidrapure completed M.Sc.(Agri) from UAS, Dharwad during 2014. Presently working in Monsanto Holdings Pvt Ltd as a Production Executive at Tumkur (Karnataka, India) since 2.5 years. Dr. V. S. Kubasad graduated from University of Agricultural Sciences, Dharwad, Karnataka in the year 1986 and completed my Ph.D. in the year 2008.